Elisa DI GIUSEPPE

Pubblicazioni

Elisa DI GIUSEPPE

 

175 pubblicazioni classificate nel seguente modo:

Nr. doc. Classificazioni
100 1 Contributo su Rivista
34 2 Contributo in Volume
31 4 Contributo in Atti di Convegno (Proceeding)
5 3 Libro
4 7 Curatele
1 8 Tesi di dottorato
Anno
Risorse
2017
Numerical analyisis of thermal bridges in dynamic conditions
Building Simulation Applications BSA 2017
Autore/i: Romagnoli, Alessandra; DI PERNA, Costanzo; Barbaresi, Davide; DI GIUSEPPE, Elisa
Editore: Bozen-Bolzano University Press
Classificazione: 2 Contributo in Volume
Abstract: Thermal bridges play a significant role in the heat loss of nearly Zero Energy Buildings (nZEB). In the case of existing buildings, the underestimation of thermal bridges can lead to errors of about 20 % in the assessment of their energy requirements. Nowadays, proper simulation tools for evaluating the building energy performance in dynamic conditions are increasingly needed. Their outputs are important inputs for life cycle costs (LCC) and life cycle assessment (LCA) as well as for energy audits. A weak point is that the tools which are currently well established on the market, do not consider the contribution given by thermal bridges to the overall building energy balance as they rely on a onedimensional approach to recreate heat flows. Several scientific studies deal with different methods that can be applied to evaluate the dynamic behaviour of thermal bridges, but they disregard the wall capacity to accumulate/release heat loads and the role played by internal temperatures. This work analyses some numerical methods proposed by different authors based on the discretization of thermal bridges and their characterization in dynamic regime. A calculation procedure is evaluated to underline its potential as a rapid dynamic calculation algorithm to be integrated in the current software for dynamic analyses. The surface temperatures and the heat fluxes are taken into account. In the present work, the method of the equivalent thermal wall has been implemented to get the input parameters required to dynamically assess the thermal bridges energy contribution. Afterwards a finite volume analysis is developed to compare the outputs coming from different methods in terms of crossing fluxes, surface temperatures and thermal storage capacities. A low percentage error is found between the equivalent thermal wall and the real one in terms of surface temperatures. This achievement allows to carry out proper superficial condensation assessments. Anyway the above-exposed procedure is quite complex and time-consuming. The algorithm is then expected to be refined in the future by simplifying the necessary operations for the evaluation of thermal bridges.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/258756 Collegamento a IRIS

2017
Probabilistic life cycle costing of existing buildings retrofit interventions towards nZE target: Methodology and application example
ENERGY AND BUILDINGS
Autore/i: DI GIUSEPPE, Elisa; Iannaccone, Monica; Telloni, Martina; D’Orazio, Marco; DI PERNA, Costanzo
Classificazione: 1 Contributo su Rivista
Abstract: One of the major challenge facing the achievement of nZE standards in existing buildings is the economic issue: the evidence of monetary gains of energy savings facing high investment costs seems still rather limited to the investors’ eyes. In this context, LCC methods have gained much importance in recent years. However, they present a limitation due to the notable simplifications and hypothesis usually made for input parameters that may affect the results. In order to overcome this limit, this work suggests a probabilistic LCC based on uncertainty and sensitivity analysis via Monte Carlo methods and illustrates it through a building case study under several retrofit scenarios sighting the target nZE. The methodology allows investigating the economic effectiveness of alternative measures, giving insight into possible ranges of the economic indicator related to a specific design option. The analysis is focused on a micro-economic dimension and based on the availability and reliability of inputs data and on their proper characterization with Probability Density Functions. Variance-based methods for sensitivity analysis are employed to establish the most influential parameters on output uncertainty. The paper demonstrates the potentials of a probabilistic LCC in providing a more realistic decision support about investments for energy efficient projects.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/246175 Collegamento a IRIS

2017
Towards a probabilistic approach in LCA of building retrofit measures
ENERGY PROCEDIA
Autore/i: Favi, Claudio; Meo, Ivan; Di Giuseppe, Elisa; Iannaccone, Monica; D’Orazio, Marco; Germani, Michele
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/251560 Collegamento a IRIS

2017
Impacts of Uncertainties in Life Cycle Cost Analysis of Buildings Energy Efficiency Measures: Application to a Case Study
ENERGY PROCEDIA
Autore/i: DI GIUSEPPE, Elisa; Massi, Andrea; D'Orazio, Marco
Classificazione: 1 Contributo su Rivista
Abstract: Life Cycle Cost (LCC) analysis in the field of building renovation is considered an important decision support of the design process in order to compare the effectiveness of different energy efficiency measures (EEMs). Nevertheless, data uncertainty is a well-recognised issue associated with LCC deterministic calculation methods and probabilistic methodologies could instead provide a more effective decision support. This paper proposes a Monte Carlo based methodology for uncertainty quantification that combines parametric building simulation and LCC analysis, showing a great potential in the possibility of combining several EEMs and undertake the uncertainty calculation with low computational costs and high accuracy of the result. The work aimed to identifying and quantifying the main uncertain inputs of the LCC assessment and developing a tools suite to automate the process of evaluation of the energy impact due to the combination of several EEMs and quantification of the uncertainty distribution of the output. Results from the application to a case study are mainly intended to illustrate the methodology application and underline the impact that input uncertainties may have on the output variable. The difficulty to identify the robust EEMs is particularly due to the great influence of macroeconomic parameters uncertainty used in the calculation.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/246176 Collegamento a IRIS

2017
Design and performance assessment of building counter-walls integrating Moisture Buffering “active” devices
ENERGY PROCEDIA
Autore/i: Gianangeli, Andrea; DI GIUSEPPE, Elisa; D'Orazio, Marco
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/251561 Collegamento a IRIS

2016
Experimental and numerical assessment of breathing walls performance for the improvement of air quality and comfort indoors
TEMA
Autore/i: DI GIUSEPPE, Elisa; D'Orazio, Marco
Classificazione: 1 Contributo su Rivista
Abstract: The construction of airtight building envelopes within nearly Zero Energy Buildings is likely to generate thermo-hygrometric discomfort indoors, that needs to be managed with airconditioning and ventilation systems. In countertrend, some researches developed in northern Europe countries focused on the construction of “breathing” building envelopes that let in the air (passively or with mechanical devices) through dynamic thermal insulations able to preheat and filter it from possible pollutants. This study reports the results of experimental and analytical assessments of dynamic insulation systems, aimed to the design of a breathing wall system for the application in building renovation interventions.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/244324 Collegamento a IRIS

2016
Degrado di strutture lignee in edifici storici: effetti dell’uso di isolanti capillarmente attivi per il retrofit energetico / Decay of wooden beams in historical buildings: effects of capillary active insulation for the energy retrofit
Colloqui.AT.e 2016. MATER(i)A Materials Architecture Technology Energy/Environment Reuse (Interdisciplinary) Adaptability
Autore/i: Gianangeli, Andrea; Nikita, Cozzolino; Elena, Ippoliti; DI GIUSEPPE, Elisa; D'Orazio, Marco
Editore: Gangemi Editore
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: According to the actual Italian regulation on energy efficiency, retrofit interventions in historic building's envelope typically concern the internal thermal insulation, which however can cause a strong alteration of the hygrothermal conditions of the interior environment and of building components. Consequently, the risk of decay and microorganism proliferation increases. Aim of this work is the evaluation of the effectiveness of capillary active insulation materials for the reduction of these typical problems’ impact. After experimental activities, aimed at measuring operating hygrothermal conditions of a historic office building and obtaining simulation boundary conditions, HAM simulations have been used to evaluate the hygrothermal performance of wooden beams and envelope components. Results expressed by specific decay indicators showed that internal insulation is likely to involve an increase of building components decay. Nevertheless, the use of a capillary active insulation system can significantly reduce the damage risk.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/250288 Collegamento a IRIS

2016
Strategie in copertura per il comfort interno estivo
COSTRUIRE IN LATERIZIO
Autore/i: DI GIUSEPPE, Elisa; D'Orazio, Marco; DI PERNA, Costanzo
Classificazione: 1 Contributo su Rivista
Abstract: Data l’elevata resistenza termica richiesta oggi ai componenti edilizi, la ventilazione sottomanto si rivela una strategia più efficace ai fini del comfort interno estivo rispetto all’utilizzo di materiali ad elevata riflettanza in copertura
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/238817 Collegamento a IRIS

2016
Una riflettanza equivalente per coperture in laterizio ventilate
LIT, LATERIZI D'ITALIA
Autore/i: DI GIUSEPPE, Elisa; D'Orazio, Marco; DI PERNA, Costanzo
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/244883 Collegamento a IRIS

2016
Progettare edifici nZEB in clima mediterraneo. Strategie ed esempi progettuali per nearly Zero Energy Building
Autore/i: DI GIUSEPPE, Elisa
Editore: Maggioli
Classificazione: 3 Libro
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/243165 Collegamento a IRIS

2016
Prestazioni termiche di componenti edilizi per il database INNOVance
COSTRUIRE IN LATERIZIO
Autore/i: DI GIUSEPPE, Elisa; Gulino, Rosario; Di Fusco, Alfonsina
Classificazione: 1 Contributo su Rivista
Abstract: L’articolo presenta la metodologia per il calcolo di grandezze termiche di stratigrafie in laterizio, sviluppata per il database INNOVance, con i relativi risultati. Tali informazioni agevolano la valutazione delle prestazioni di diverse soluzioni tecniche
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/244495 Collegamento a IRIS

2016
Pareti “traspiranti” e qualità dell’aria interna: valuazioni sperimentali ed analitiche delle prestazioni per la progettazione in clima mediterraneo
Colloqui.AT.e 2015. L’orizzonte del sapere tecnico in Architettura
Autore/i: DI GIUSEPPE, Elisa; D'Orazio, Marco
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/244810 Collegamento a IRIS

2016
Jackson Clements Burrows Pty Ltd Architects, Harold Street Residence, Melbourne, Australia
COSTRUIRE IN LATERIZIO
Autore/i: DI GIUSEPPE, Elisa
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/243167 Collegamento a IRIS

2016
Sviluppo di una metodologia probabilistica per valutazioni LCC di interventi di retrofit di edifici / Development of a probabilistic methodology for LCC assessments of building retrofit measures
Colloqui.AT.e 2016. MATER(i)A Materials Architecture Technology Energy/Environment Reuse (Interdisciplinary) Adaptability
Autore/i: DI GIUSEPPE, Elisa; Monica, Iannaccone; Martina, Telloni; Quagliarini, Enrico; D'Orazio, Marco
Editore: Gangemi
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: Life Cycle Cost (LCC) analysis in the field of buildings has been introduced at regulatory level in Europe by Directive 2010/31/EU on the energy performance of buildings. This established that Member States should assess their “cost-optimal levels” of minimum energy performance requirements considering the calculation method of standard EN 15459. However, in LCC analysis, results are heavily dependent on future trends for macroeconomic parameters (e.g. inflation rate, market interest rate, energy prices) and on the service life and costs of building components and their corresponding uncertainties. Since LCC methodologies in the field of buildings are considered as important decision supports of the design process, it is then necessary to assess and communicate the problem of these uncertainties properly; otherwise design options might be selected based on faulty assumptions. In this work a methodology for uncertainty quantification and sensitivity analysis for buildings LCC is developed. Through the application to a case study, its potential is showed, linked to the possibility of providing decision support during the design phase by investigating and comparing different energy efficiency measures.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/244808 Collegamento a IRIS

2016
Uncertainties in Life Cycle Cost Analysis of Buildings Energy Efficiency Measures
JOURNAL OF FUNDAMENTALS OF RENEWABLE ENERGY AND APPLICATIONS
Autore/i: D'Orazio, Marco; DI GIUSEPPE, Elisa
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/236024 Collegamento a IRIS

2015
Experimental assessment of moisture buffering “active” devices for indoor humidity control
TEMA
Autore/i: DI GIUSEPPE, Elisa
Classificazione: 1 Contributo su Rivista
Abstract: A high thermal resistance and air tightness of the building envelope risk to create great internal moisture load with consequences for durability of materials and inhabitants’ comfort and health. The passive solution here proposed is a moisture buffering “active” device (MB-AD), to be integrated in the building envelope, which is able to measure the RH indoors and react by increasing the MB ability of a material forcing the passage of air inside it. The hygrothermal performance of the device has been experimentally tested and results showed that the Moisture Buffering Value measured in the “active” device increased until 29% more than the “passive” one.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/243168 Collegamento a IRIS

2015
L’orizzonte del sapere tecnico in Architettura
Autore/i: DI GIUSEPPE, Elisa; Cecilia, Mazzoli
Editore: Maggioli
Classificazione: 7 Curatele
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/243166 Collegamento a IRIS

2015
Uncertainty effects of input data on cost optimal nZEB performance analysis
Zero Energy Mass Custom Home ZEMCH 2015 International Conference Proceedings
Autore/i: Salavatian, Seyedehmamak; DI GIUSEPPE, Elisa; D'Orazio, Marco
Editore: ZEMCH Network Publisher e Ordine degli Architetti Pianificatori Paesaggistici della Provincia di Bari
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: According to EPBD recast 2010, all European member states have to set their national minimum energy performance requirements with a view to achieve cost-optimal levels following the delegated regulation No 244/2012 and normative EN 15459:2008. Although economic input data utilized for calculating future costs are based on statistical predictions and not defi nite, most of studies in this regard are based on a deterministic system that do not consider any randomness of parameters in global cost calculations. This paper aims to utilize EU suggested methodology on a representative apartment building in Italian context in order to evaluate eff ects of uncertainties in assumed economical input data on calculation results. In this study, twenty two wall envelope technologies were taken as design variables for acquiring primary energy needs and performing LCC calculations. By analyzing time series of main fi nancial rates during recent years, their magnitude as well as marginal percentages were introduced and applied to the parameters by means of a of Monte Carlo based method; Then, amount of uncertainties for obtained results were quantifi ed by means of statistical indicators and variation of possible output around base case values were fi gured out. Moreover, infl uence of individual input as well as combination scenarios were studied in a sensitivity analysis. Among studied parameters, Rp (Product price development rate) was identifi ed as the most dominant stochastic parameter.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/244884 Collegamento a IRIS

2015
Proctor and Matthews Architects, Hargood Close a Colchester (UK) 2011-2013
COSTRUIRE IN LATERIZIO
Autore/i: DI GIUSEPPE, Elisa
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/243170 Collegamento a IRIS

2015
Proctor and Matthews Architects, Superare le aspettative
COSTRUIRE IN LATERIZIO
Autore/i: DI GIUSEPPE, Elisa
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/243169 Collegamento a IRIS

2015
L’architettura sensibile di Proctor and Matthews Architects, Intervista agli architetti
COSTRUIRE IN LATERIZIO
Autore/i: DI GIUSEPPE, Elisa
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/243171 Collegamento a IRIS

2015
Huttunen-Lipasti-Pakkanen Architects ltd, Tontunmäentie 42, Espoo, Finlandia
COSTRUIRE IN LATERIZIO
Autore/i: DI GIUSEPPE, Elisa
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/243173 Collegamento a IRIS

2015
Costruire in Laterizio 164 - Proctor and Matthews Architects
COSTRUIRE IN LATERIZIO
Autore/i: DI GIUSEPPE, Elisa
Classificazione: 7 Curatele
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/314610 Collegamento a IRIS

2015
Livelli ottimali di costo per involucri ad alta efficienza energetica
INGENIO
Autore/i: DI GIUSEPPE, Elisa; D'Orazio, Marco
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/244811 Collegamento a IRIS

2015
L’orizzonte del sapere tecnico in Architettura. Introduzione
L’orizzonte del sapere tecnico in Architettura
Autore/i: DI GIUSEPPE, Elisa; Mazzoli, Cecilia
Editore: Maggioli
Classificazione: 2 Contributo in Volume
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/243175 Collegamento a IRIS

2015
Valutazione sperimentale di dispositivi moisture buffering “attivi” per il controllo dell’umidità ambientale interna
Colloqui.AT.e 2014. L’orizzonte del sapere tecnico in Architettura
Autore/i: Di Giuseppe, Elisa
Editore: Maggioli Editore
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/243176 Collegamento a IRIS

2015
Nicola Braghieri e EX-M Architetti Associati - Unità Minima 5A e 5B a Settimo Milanese, Milano
COSTRUIRE IN LATERIZIO
Autore/i: DI GIUSEPPE, Elisa
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/243172 Collegamento a IRIS

2015
L’orizzonte del sapere tecnico in Architettura. Introduzione
Colloqui.AT.e 2014 L’ORIZZONTE DEL SAPERE TECNICO IN ARCHITETTURA
Autore/i: DI GIUSEPPE, Elisa; Mazzoli, Cecilia
Editore: Maggioli Editore
Classificazione: 2 Contributo in Volume
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/315312 Collegamento a IRIS

2015
Assessment of the effectiveness of cool and green roofs for the mitigation of the Heat Island effect and for the improvement of thermal comfort in Nearly Zero Energy Building
ARCHITECTURAL SCIENCE REVIEW
Autore/i: DI GIUSEPPE, Elisa; D'Orazio, Marco
Classificazione: 1 Contributo su Rivista
Abstract: The effectiveness of cool and green roofs to improve thermal comfort could be strongly dependent on the U-value of the roof itself and on the way it has been constructed (ventilated or unventilated, lightweight or massive, etc.). Recent strict limits on the U-values of building envelopes run the risk of reducing the effectiveness of cooling strategies in roofs which could be employed in warm and temperate climates to reduce surface temperatures and consequently to cool internal environment. In this paper, we experimentally analyse some roof systems (a high-albedo membrane and a green roof) compared to traditional ones in a Nearly Zero Energy Building, in order to provide new information concerning their effect on the internal comfort and the air temperatures of the surrounding environment. Experimental results confirm that, while the effectiveness of green and cool roofs for the mitigation of the Urban Heat Island effect is well established, the use of high-albedo materials on roofing systems with very low U-value is of little effectiveness for internal comfort. The green roof is distinguished by its passive cooling ability due to the evapotranspiration phenomena of the vegetation and the storage capacity of the substrate.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/228806 Collegamento a IRIS

2015
Thermal and Filtration Performance Assessment of a Dynamic Insulation System
ENERGY PROCEDIA
Autore/i: DI GIUSEPPE, Elisa; D'Orazio, Marco; DI PERNA, Costanzo
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/234182 Collegamento a IRIS

2014
Livelli ottimali di costo per involucri ad alta efficienza energetica
COSTRUIRE IN LATERIZIO
Autore/i: DI GIUSEPPE, Elisa; D'Orazio, Marco
Classificazione: 1 Contributo su Rivista
Abstract: In the last decade, the increasing demand for energy efficient buildings has led the stakeholders to look for technological solutions at the highest level, often with high investment costs. The EPBD recast 2010/31/EU on energy efficiency in buildings for the first time emphasizes the need to make design choices taking into account the cost-benefit assessment during the estimated life cycle of buildings. In this perspective, the “optimal” energy efficiency solution is not the one that achieves the best energy performance ever, because this may involve a higher initial investment cost, non-depreciable during the life cycle of the building. The “optimal” solution is rather the point of balance between investment and depreciation, estimated considering all the cost elements that come into play during the life cycle of the building. The Directive then addresses the stakeholders to choose “balanced” technologies, not necessarily the most efficient. However, the application of the calculation method is quite elaborate and requires a precise definition of all the variables involved: the cost of each building component that influences the energy performance; financial parameters; times of maintenance and replacement of components, time of service life of the building, etc. Consequently, there is a possible risk that the uncertainty in the evaluation of these parameters is so influential to make difficult to identify the “optimal” energy efficiency solution in terms of cost-benefit analysis. The present paper shows the first results of a research on the evaluation of the influence of the uncertainty of the input variables on the results of a cost-benefit evaluation of design choices related to the building envelope. The evaluation was performed on 25 alternatives wall solutions, showing primarily as not necessarily the ones with the lower thermal transmittance are the most convenient, considering the entire life cycle of the building. Indeed, these are characterized by higher costs during construction (investment costs) that are not offset by a reduction in operating costs (energy consumptions). Then applied the Monte Carlo statistical method, by assigning to the variables involved oscillating values within predefined intervals, we obtained that, when considering the possible variability of these quantities, it becomes very difficult for any designer to assess unambiguously the optimal solution in terms of cost-benefit analysis.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/223117 Collegamento a IRIS

2014
Paan Architects, Hill House, Dionysos, Grecia
COSTRUIRE IN LATERIZIO
Autore/i: DI GIUSEPPE, Elisa
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/243174 Collegamento a IRIS

2014
Manti permeabili per tetti traspiranti
COSTRUIRE IN LATERIZIO
Autore/i: Di Giuseppe, E.; D'Orazio, M.
Classificazione: 1 Contributo su Rivista
Abstract: That the ventilation in the roof effectively fulfils the cooling function of a building is a well-established concept. However the common opinion associates the working of a ventilated roof only related to the “chimney effect”, neglecting the fact that in discontinuous coverings (such as clay tiles coverings), most of the heat is dispersed by ventilation through the joints of the tiles, with beneficial effects. This paper reports the results of several experimental activities in this regard. We monitored the summer thermal performance of full-scale roofs, built according to the current requirements of thermal transmittance, with different types of coverings (clay tiles, copper) and height of air gap (3 cm and 6 cm). Results show that clay tiles roofs are more effective than copper roofs in cooling the internal environment, and that in roofs with low thermal transmittance, it is of little convenience to invest in elevated air gaps. A tracking smoke test of the air movement into the roofs showed that most of the air entering into the gaps of clay tiles roofs then escapes through the joints of the tiles. Laboratory tests allowed to quantify this airflow and to correlate it to the amount of heat removed by ventilation in a clay tile roof
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/176109 Collegamento a IRIS

2014
Costruire in Laterizio 159 - verso nZEB
COSTRUIRE IN LATERIZIO
Autore/i: DI GIUSEPPE, Elisa
Classificazione: 7 Curatele
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/314612 Collegamento a IRIS

2014
Moisture Buffering “Active” Devices for Indoor Humidity Control: Preliminary Experimental Evaluations
ENERGY PROCEDIA
Autore/i: DI GIUSEPPE, Elisa; D'Orazio, Marco
Classificazione: 1 Contributo su Rivista
Abstract: In recent building practice, obligations of legislation relating to Nearly Zero Energy Buildings (NZEB) (European Directives 2002/91/EC and 2010/31/EU) are carried out mainly by high thermal resistance and total air tightness of the envelope, in order to minimize heat dispersions by conduction and infiltration as much as possible. These measures cause new ways of heat and moisture exchange in the building envelope and are likely to create high internal moisture load with consequences for durability of materials and inhabitants’ comfort and health. Improvement in the thermal performance of the envelope can then lead to the paradoxical need for high energy consumption in order to handle the vapor peaks indoors by using mechanical ventilation equipments. Even if with HVAC devices it is possible to provide an acceptable indoor climate, there is still a need to develop more passive and less energy intensive methods to moderate the indoor environment in NZEB. In recent decades many authors have focused on a promising strategy related to the use of “moisture buffering” materials which dampen indoor humidity variations without additional energy costs. Nevertheless, many internal finishing materials commonly used at present are still not highly performant or lead to problems of hysteresis. In the present study, we propose an alternative solution, which is the design of a moisture buffering “active” device, to be integrated in a part of the building envelope, which is able to measure the relative humidity indoors and control its loads by a low-energy-consumption fan system. The humidity control performance of the device has been dynamically tested in a climate chamber and has been compared with traditional “passive” material samples in order to measure the Moisture Buffering Value (MBV) according to the DTU test method. Experimental results showed that “passive” samples have high moisture buffering values [MBV = 6.12 g/(m2% RH)] and do not lead to hysteresis phenomena. The MBV measured in the “active” devices increased up to 29%, which predicts promising future applications for low-energy-consumption indoor humidity control.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/218317 Collegamento a IRIS

2014
A field study of thermal inertia of roofs and its influence on indoor comfort
JOURNAL OF BUILDING PHYSICS
Autore/i: D'Orazio, Marco; DI PERNA, Costanzo; DI GIUSEPPE, Elisa
Classificazione: 1 Contributo su Rivista
Abstract: Many of the current European Member States regulations on energy saving in buildings seem to follow North European trends that call for high insulation of the envelope. However, this kind of set-up overlooks some specific elements that are necessary to build typical buildings in warmer climates. Thermal inertia on the internal surface of the envelope has traditionally been used in such contexts not only to contain solar gains but also to protect against cold winter because of its capacity to store and to slowly release energy. This research investigates how thermal inertia on roof slabs could positively affect the comfort indoors, also in buildings that tend towards being nearly zero-energy buildings, as suggested by last European Directive 2010/31/EU. With this aim, an experiment was conducted on a full-scale building with different roofs, on light and heavy slabs, under hot and moderate climatic conditions (Ancona, Italy). The thermal performance of roofs was monitored during summer and winter seasons. In winter, the building was also subjected to cyclical internal heat gains. The experiment demonstrated that a certain thermal inertia in the slab guarantees better indoor comfort in both summer and winter, and it can also reduce energy consumption from heating.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/147703 Collegamento a IRIS

2014
Experimental operating cell temperature assessment of BIPV with different installation configurations on roofs under Mediterranean climate
RENEWABLE ENERGY
Autore/i: D'Orazio, Marco; DI PERNA, Costanzo; DI GIUSEPPE, Elisa
Classificazione: 1 Contributo su Rivista
Abstract: The presence of an air gap between a photovoltaic (PV) module and roof facilitates ventilation cooling under the device and consequently reduces cell temperature and improves its performance. In case of rack-mounted PV installation, the Nominal Operating Cell Temperature (NOCT) method could be effectively used to predict the temperature of the module for various environmental conditions. Many countries, for esthetic purposes, offer economic advantages (tax deductions, incentives, etc ... ) for the installation of building integrated photovoltaic modules (BIPV), with water-tightness capability and adequate mechanical resistance in order to substitute tile covering or part of it. Nevertheless, poor or absent ventilation under BIPV panels could cause them to overheat and reduce their efficiency. Lack of validated predictive tools for the evaluation of BIVP energy performance could be another barrier to their widespread application. In this study, we investigated the thermal performance of PV modules installed in a real scale experimental building over a traditional clay tile pitched roof in Italy for almost one year (from August 2009 to June 2010). One PV module was rack-mounted over the roof covering with a 0.2 m air gap; the others were fully integrated and installed at the same level of the roof covering (one with an air gap of 0.04 m, the other mounted directly in contact with the insulation). Temperature and heat flux measurements for each panel, and environmental parameters were recorded. Two temperature prediction models, NoCT model and SNL (Sandia National Laboratory) model were used to predict BIPV temperature and energy efficiency so that their suitability for BIPV could be evaluated. SNL model takes into account also the wind speed. Experimental results demonstrate that even though the rack-mounted PV module constantly maintains cell temperature below that of the other full-building integrated modules, due to the presence of a higher air gap, the difference in the energy produced by the BIPV modules estimated for the entire monitoring period is less than 4%. The two predictive models, NOCT and SNL, cause the differences in predicted and calculated temperature up to 10 degrees C. However, subsequent percentage variations on the energy predicted compared to that arising from the temperature measured generally turn out to be lower than 5%. An optimization of empirical coefficients used for calculations based on the SNL method allows for the reduction of this value below 2.5%.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/149705 Collegamento a IRIS

2013
Moisture Buffering
MODULO
Autore/i: DI GIUSEPPE, Elisa; D'Orazio, Marco
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/244727 Collegamento a IRIS

2013
Il confort abitativo nel certificato energetico
ARCHITETTI
Autore/i: DI GIUSEPPE, Elisa; Fantini, Lorenza; D'Orazio, Marco; DI PERNA, Costanzo
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/237000 Collegamento a IRIS

2013
I laterizi a vista come sistema di “moisture buffering” per gli isolanti naturali
INGENIO
Autore/i: DI GIUSEPPE, Elisa; D'Orazio, Marco
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/147710 Collegamento a IRIS

2013
Thermal effectiveness of green roofs on NZE buildings
The Visibility of Zero-Energy Housing
Autore/i: D'Orazio, Marco; Di Perna, Costanzo; Di Giuseppe, Elisa
Editore: ZEMCH Network (Miami)
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: The research deals with the experimental assessment of the thermal performance of a green roof compared to other passive cooling technologies (roofs with ventilated cavities or with a reflective covering), under temperate climate in Italy. All roofs are installed on a highly insulated building, in order to understand whether their performance is inhibited by the low thermal transmittance necessary to meet the building energy saving regulations in Europe. Green roofs are also recognized as a fundamental strategy that dense urban areas can deploy to mitigate the Urban Heat Island effect, thanks to their high albedo. Roofs albedo and thermal transmittance were experimentally evaluated. The measurement results show that the passive cooling property of a green roof is not only due to its albedo, but also to combined effects of soil insulation, evapotranspiration and radiative shading of the plant canopy. In summer, a reduction of the surface temperatures has been recorded on the upper part of the soil substrate where temperatures turn out to be lower than those of the external air, and also on the roof soffit because of the thermal inertia of the soil substrate. In winter, the soil substrate of the green roof acts as a natural insulating material, providing further thermal resistance to the roof.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/226851 Collegamento a IRIS

2013
Is Italian energy certification really representative of the indoor comfort ?
TILE & BRICK INTERNATIONAL
Autore/i: D'Orazio, Marco; DI PERNA, Costanzo; DI GIUSEPPE, Elisa; Fantini, Lorenza
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/102466 Collegamento a IRIS

2013
Un indice di confort abitativo nel certificato energetico
INGENIO
Autore/i: DI GIUSEPPE, Elisa; Fantini, L.; D'Orazio, Marco; DI PERNA, Costanzo
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/147709 Collegamento a IRIS

2013
I laterizi come sistema di "moisture buffering"
COSTRUIRE IN LATERIZIO
Autore/i: DI GIUSEPPE, Elisa; D'Orazio, Marco
Classificazione: 1 Contributo su Rivista
Abstract: La ricerca condotta ha permesso di valutare l’utilizzabilità di alcune tipologie di isolanti in costruzioni basate sull’impiego del laterizio, evidenziando il ruolo che può giocare quest’ultimo (con la sua massa) nel mantenere bassi i contenuti d’acqua all’interno degli stessi isolanti, aumentandone l’efficienza. Si evidenzia, quindi, come le soluzioni massive con il laterizio «faccia a vista» sono capaci di ridurre i contenuti d’acqua in esercizio a carico di isolanti fibrosi di tipo naturale. Come noto, molti isolanti fibrosi sono fortemente igroscopici, aspetto che determina significative differenze tra prestazioni termiche «a secco» e in esercizio
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/102467 Collegamento a IRIS

2013
Moisture Buffering per isolanti naturali
CASA & CLIMA
Autore/i: DI GIUSEPPE, Elisa; D'Orazio, Marco
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/147711 Collegamento a IRIS

2013
Bricks and “Heat Island”: cool strategies in the tradition
TILE & BRICK INTERNATIONAL
Autore/i: DI GIUSEPPE, Elisa; D'Orazio, Marco
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/244812 Collegamento a IRIS

2013
Nearly Zero Energy Buildings and Proliferation of Microorganisms. A Current Issue for Highly Insulated and Airtight Building Envelopes
SPRINGERBRIEFS IN APPLIED SCIENCES AND TECHNOLOGY
Autore/i: DI GIUSEPPE, Elisa
Editore: Springer International Publishing
Classificazione: 3 Libro
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/243164 Collegamento a IRIS

2013
Definitions
Nearly Zero Energy Buildings and Proliferation of Microorganisms A Current Issue for Highly Insulated and Airtight Building Envelopes
Autore/i: DI GIUSEPPE, Elisa
Editore: Springer
Classificazione: 2 Contributo in Volume
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/244844 Collegamento a IRIS

2013
Conclusions
Nearly Zero Energy Buildings and Proliferation of Microorganisms A Current Issue for Highly Insulated and Airtight Building Envelopes
Autore/i: DI GIUSEPPE, Elisa
Editore: Springer
Classificazione: 2 Contributo in Volume
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/244842 Collegamento a IRIS

2013
Development of Mould in Indoor Environments
Nearly Zero Energy Buildings and Proliferation of Microorganisms A Current Issue for Highly Insulated and Airtight Building Envelopes
Autore/i: DI GIUSEPPE, Elisa
Editore: Springer
Classificazione: 2 Contributo in Volume
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/244849 Collegamento a IRIS

2013
Introduction
Nearly Zero Energy Buildings and Proliferation of Microorganisms A Current Issue for Highly Insulated and Airtight Building Envelopes
Autore/i: DI GIUSEPPE, Elisa
Editore: Springer
Classificazione: 2 Contributo in Volume
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/244843 Collegamento a IRIS

2013
Thermal performance of an insulated roof with reflective insulation: Field tests under hot climatic conditions
JOURNAL OF BUILDING PHYSICS
Autore/i: D'Orazio, Marco; DI GIUSEPPE, Elisa; DI PERNA, Costanzo; Morodo, M.
Classificazione: 1 Contributo su Rivista
Abstract: The use of reflective insulation materials in buildings, for energy saving in summer, has been spreading in southern Europe. These products are not typical of the local building context. There is a lack of well-established measurement systems for reflective insulation thermal transmittance. The aim of this article is to understand whether a reflective insulation material could be effective in hot and temperate climate, also compared with other roof solutions. For this purpose, we compared the thermal performance of a roof with and without reflective insulation, both installed in a full-scale experimental building near Ancona (Italy) in the summer period. The results showed that the reflective insulation benefits are quite limited when using the insulation level imposed by actual laws, which consider insulation as the main strategy for energy saving in temperate and hot climates.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/74146 Collegamento a IRIS

2013
Remedial Actions and Future Trends
Nearly Zero Energy Buildings and Proliferation of Microorganisms A Current Issue for Highly Insulated and Airtight Building Envelopes
Autore/i: DI GIUSEPPE, Elisa
Editore: Springer
Classificazione: 2 Contributo in Volume
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/244841 Collegamento a IRIS

2013
Algal Growth on External Building Envelope
Nearly Zero Energy Buildings and Proliferation of Microorganisms A Current Issue for Highly Insulated and Airtight Building Envelopes
Autore/i: DI GIUSEPPE, Elisa
Editore: Springer
Classificazione: 2 Contributo in Volume
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/244845 Collegamento a IRIS

2013
Analytical and Experimental Methods for the Assessment of the Biological Proliferation in Buildings
Nearly Zero Energy Buildings and Proliferation of Microorganisms A Current Issue for Highly Insulated and Airtight Building Envelopes
Autore/i: DI GIUSEPPE, Elisa
Editore: Springer
Classificazione: 2 Contributo in Volume
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/244847 Collegamento a IRIS

2013
Nearly Zero Energy Buildings and Proliferation of Microorganisms
Nearly Zero Energy Buildings and Proliferation of Microorganisms A Current Issue for Highly Insulated and Airtight Building Envelopes
Autore/i: DI GIUSEPPE, Elisa
Editore: Springer
Classificazione: 2 Contributo in Volume
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/244846 Collegamento a IRIS

2013
Performance Assessment of Different Roof Integrated Photovoltaic Modules under Mediterranean Climate
ENERGY PROCEDIA
Autore/i: D'Orazio, Marco; DI PERNA, Costanzo; DI GIUSEPPE, Elisa
Classificazione: 1 Contributo su Rivista
Abstract: Many countries, for aesthetic purposes, offer economic advantages (tax deductions, incentives, etc..) for the installation of building integrated photovoltaic modules (BIPV), with water-tightness capability and adequate mechanical resistance in order to substitute tile covering or part of it. Nevertheless, poor or absent ventilation under BIPV panels could cause them to overheat and reduce their efficiency. It is well established that the presence of an air gap between a photovoltaic (PV) module and roof covering facilitates ventilation cooling under the device and consequently reduces cell temperature and improves its performance. In this study, we investigated the thermal performance of PV modules installed in a real scale experimental building over a traditional clay tile pitched roof in Italy for almost one year (from August 2009 to June 2010). One PV module was rack-mounted over the roof covering with a 0.2 m air gap; the others were fully integrated and installed at the same level of the roof covering (one with an air gap of 0.04 m, the other mounted directly in contact with the insulation). Temperature and heat flux measurements for each panel, and environmental parameters were recorded. Experimental results demonstrate that even though the rack-mounted PV module constantly maintains cell temperature below that of the other full-building integrated modules, due to the presence of a higher air gap, the difference in the energy produced by the PV modules estimated for the entire monitoring period is less than 4%.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/139682 Collegamento a IRIS

2012
Valutazione della durabilità di materiali per manti di copertura
COSTRUIRE IN LATERIZIO
Autore/i: D'Orazio, Marco; DI GIUSEPPE, Elisa; Tosi, Giorgio; Persico, I; Mosca, S.
Classificazione: 1 Contributo su Rivista
Abstract: I prodotti e i sistemi destinati alla realizzazione delle coperture, oggigiorno, mutano sempre più velocemente, perdendo quindi l’efficace collaudo del tempo. Allo scopo di verificarne la durabilità, anche dai punti di vista «ambientale» ed «estetico», sono stati sottopost a stress ciclico (invecchiamento accelerato) alcuni dei materiali più diffusi costituenti il manto di copertura
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/74131 Collegamento a IRIS

2012
Un indice di comfort abitativo nel certificato energetico
COSTRUIRE IN LATERIZIO
Autore/i: DI GIUSEPPE, Elisa; Fantini, L.; D'Orazio, Marco; DI PERNA, Costanzo
Classificazione: 1 Contributo su Rivista
Abstract: Lo studio evidenzia come le norme Uni Ts 11300, adottate per la certificazione energetica degli edifici, possano in alcuni casi non cogliere pienamente alcune peculiarità del comportamento termo-fisico dell’edificio e in particolare alcuni aspetti inerziali dello stesso. Questi metodi possono tuttavia essere facilmente integrati da una semplice valutazione delle temperature operative interne in fase estiva, che permette di cogliere il reale comportamento della struttura in termini di comfort
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/72351 Collegamento a IRIS

2012
Green Roofs as passive cooling strategies under Temperate Climates
ZEMCH 2012 International Conference Proceedings
Autore/i: D'Orazio, Marco; DI PERNA, Costanzo; DI GIUSEPPE, Elisa
Editore: ZEMCH Network
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Abstract: The research aims to the comprehension of the energy performance of a green roof, also compared to other passive cooling strategies, when realized on slabs with very low thermal transmittance, as imposed by recent laws on the energy performance of buildings also in Temperate Climates. Although many studies in literature highlight the potential of green roofs on the improvement of internal conditions (reduction of incoming heat fluxes, thermal wave phase shift), knowledge regarding the use of these technologies in highly insulated structures is quite limited. All EU countries in particular, following the issuing of two important Directives (“Save” and “Nearly Zero Energy Buildings”), are enacting decrees which have placed regulatory requirements and strict limits to the thermal transmittance of building components. If the “overinsulation” strategy in Temperate Climates (i.e. Italy, Greece, Spain), is useful for the winter energy savings, it risks to limits the effectiveness of alternative passive cooling strategies, as the use of green roofs. We carried out a thermal monitoring of seven low U-value roof systems, differentiated by the type of covering, the type of slab, the presence of a ventilated cavity, the presence of a vegetated substrate. Experimental results show that the green roof and the other passive cooling technologies benefits, as the reduction of the incoming heat flux and internal surface temperatures, are quite limited by the roofs high insulation imposed by actual laws, which consider the overinsulation as the whole strategy for energy saving even in Temperate Climates.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/86375 Collegamento a IRIS

2012
Laterizi ed "isola di calore": strategie cool nella tradizione
COSTRUIRE IN LATERIZIO
Autore/i: DI GIUSEPPE, Elisa; D'Orazio, Marco
Classificazione: 1 Contributo su Rivista
Abstract: Recentemente si è diffuso l’interesse a sperimentare strategie volte alla mitigazione del fenomeno dell’ «isola di calore» che si genera negli estesi ambienti urbani a causa del surriscaldamento delle superfici degli edifici e delle strade. Materiali con modeste caratteristiche di riflettanza rischiano di accentuare il fenomeno. I laterizi per coperture (tegole e coppi), dalle equilibrate proprietà radiative e grazie alla ventilazione sottomanto, sono invece in grado di garantire minori temperature superficiali, riducendo gli apporti di calore all’aria esterna
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/86151 Collegamento a IRIS

2012
Thermal performance of reflective insulation in mediterranean climate
Sustainable Mediterranean Construction. Sustainable Environment in the Mediterranean Region: from Housing to Urban and Land Scale Construction
Autore/i: DI GIUSEPPE, Elisa; D'Orazio, Marco; DI PERNA, Costanzo
Editore: Franco Angeli
Luogo di pubblicazione: Milano
Classificazione: 2 Contributo in Volume
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/86376 Collegamento a IRIS

2012
Energia dal tetto con i sistemi solari: valutazione sperimentale delle prestazioni
COSTRUIRE IN LATERIZIO
Autore/i: DI GIUSEPPE, Elisa; D'Orazio, Marco; DI PERNA, Costanzo
Classificazione: 1 Contributo su Rivista
Abstract: Il sole è quella, tra le principali fonti di energia rinnovabile, a cui oggi si guarda con attenzione. Gli impianti solari termici e fotovoltaici, che permettono di realizzare sistemi di produzione energetica diffusi, presentano un’efficienza che può variare fortemente in relazione alle modalità con cui si integrano in copertura e con la tipologia del manto. Una ricerca sperimentale su pannelli fotovoltaici differentemente integrati in copertura mostra come la ventilazione sottomanto nelle soluzioni in laterizio sia un mezzo efficace per ridurre il surriscaldamento degli elementi, che può verificarsi in sistemi totalmente integrati, evitando parallelamente errori di installazione oramai divenuti «classici»
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/244802 Collegamento a IRIS

2012
Green roof yearly performance: A case study in a highly insulated building under temperate climate
ENERGY AND BUILDINGS
Autore/i: D'Orazio, Marco; DI PERNA, Costanzo; DI GIUSEPPE, Elisa
Classificazione: 1 Contributo su Rivista
Abstract: The research deals with the experimental assessment of the yearly thermal performance of a green roof compared to other passive cooling technologies under temperate climate. All roofs are installed on highly insulated slabs (U-value < 0.25 W/m2 K), in order to understand whether in summer the passive cooling effects are inhibited by the low thermal transmittance recently introduced in many southern Europe countries to meet the demands of the energy saving regulations for the winter heating season. Even though many studies have focused on the performance of green roofs, there is little knowledge regarding their potential in highly insulated roofs. Most of the studies derived from analytical simulations, but the thermal behaviour of a green roof is a complex phenomenon and involves combined heat and mass transfer exchanges difficult to assess with analytical models, while more experimental data are necessary. Optical properties of the roofs covering materials were experimentally measured, and the thermal transmittance of the roofs was experimentally evaluated. Field measurements show how in winter the green roof is able to guarantee further insulation even in saturation conditions. In summer, the green roof mitigates incoming heat fluxes and ceiling temperatures. Its performance is however partially hindered by high insulation.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/81635 Collegamento a IRIS

2011
The thermal mass on roof slabs as a thermoregulation strategy for indoor thermal comfort and low energy consumption
Proceedings of the 2011 Helsinki World Sustainable Building Conference, SB11
Autore/i: D'Orazio, Marco; DI PERNA, Costanzo; DI GIUSEPPE, Elisa
Editore: Finnish Association of Civil Engineers
Classificazione: 4 Contributo in Atti di Convegno (Proceeding)
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/63977 Collegamento a IRIS

2011
Prestazione energetica di coperture verdi su strutture fortemente isolate
IL PROGETTO SOSTENIBILE
Autore/i: Di Giuseppe, E.; D'Orazio, M.; Di Perna, C.
Classificazione: 1 Contributo su Rivista
Abstract: La capacità di raffrescamento passivo delle coperture verdi può essere inibita dall’elevato isolamento richiesto dal legislatore che esige un contenimento dei consumi invernali anche in paesi dal clima più temperato.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/72233 Collegamento a IRIS

2011
La progettazione energetica delle coperture: valutazione sperimentale ed analitica di coperture "iperisolate" in clima caldo e temperato
Autore/i: Di Giuseppe, Elisa
Editore: Università Politecnica delle Marche
Classificazione: 8 Tesi di dottorato
Abstract: La presente Tesi di Dottorato nasce nell’ambito di una ricerca cofinanziata dall’Azienda Monier SpA e dal Dipartimento di Architettura Costruzioni e Strutture dell’Università Politecnica delle Marche, con l’obiettivo di valutare, sperimentalmente e analiticamente, le prestazioni termiche di coperture, progettate secondo le recenti disposizioni normative italiane in materia di risparmio energetico degli edifici. In particolare, il lavoro ha cercato di comprendere quali fossero le conseguenze dell’impiego di sistemi di copertura caratterizzati da livelli di trasmittanza particolarmente performanti, anche in contesti climatici caldi e temperati, e quali strategie alternative di raffrescamento passivo in copertura potessero assicurare un contributo altresì efficace per il contenimento dei consumi energetici e la garanzia della qualità ambientale degli edifici. A tal scopo, si è seguito un iter classico di ricerca, comprendente delle attività sperimentali su modelli a scala reale e su prototipi in laboratorio, e delle attività di analisi parametrica su un modello analitico sviluppato ad hoc. Durante la fase sperimentale, si sono predisposti e condotti diversi monitoraggi su sette configurazioni di copertura di un edificio a scala reale costruito ad Agugliano (Ancona). Le diverse coperture, “iperisolate” secondo le attuali prescrizioni normative sull’involucro, si differenziano per tipologia di solaio (ligneo o in laterocemento), per presenza e altezza dell’intercapedine di ventilazione (0-3-6 cm), per tipologia di manto (rame o laterizio), per presenza di una barriera radiante all’estradosso dell’isolante. I rilievi, effettuati sia in fase invernale che in fase estiva, a edificio climatizzato o meno, nel corso degli anni dal 2008 al 2010, hanno permesso di ottenere grandezze termiche e cinematiche in stratigrafia, grandezze climatiche esterne e condizioni ambientali interne all’edificio. I dati sono stati interpretati al fine di valutare la prestazione dei diversi sistemi di copertura. Collateralmente ai monitoraggi sull’edificio, si sono inoltre svolte delle sperimentazioni in laboratorio, finalizzate all’approfondimento di alcune tecnologie specifiche, in vista di una più corretta interpretazione dei dati di monitoraggio: prove per la valutazione dell’entità della ventilazione per permeabilità del manto e prove per la valutazione delle prestazioni termiche di isolanti riflettenti. I risultati delle sperimentazioni sono inoltre stati utilizzati per ottenere correlazioni empiriche o statistiche tra grandezze termiche derivate e grandezze climatiche esterne, con cui implementare e validare un modello semi-empirico, basato sull’analogia con le reti resistive – capacitive elettriche, per il calcolo energetico di coperture ventilate nel nostro contesto climatico. Con il modello si sono quindi condotte analisi parametriche per indagare la prestazione termica di coperture al variare di tecnologie costruttive (trasmittanza termica dell’isolante, presenza o meno di barriera radiante, solaio leggero o massivo), e al fine dunque di estendere i risultati sperimentali già ottenuti. In caso di coperture per le quali si imponga il rispetto dei limiti normativi di trasmittanza termica periodica e stazionaria per la zona climatica D (la zona di Ancona), i principali risultati sperimentali ed analitici ottenuti dimostrano come l’”iperisolamento” tenda ad “appiattire” le differenze tra le varie soluzioni costruttive, determinando modesti flussi termici entranti all’interno dell’edifico, ma non sempre garantendo adeguate condizioni di confort ambientale interno (“effetto scatola”). Inoltre, l’elevata resistenza termica fa sì che gli strati del pacchetto superiore della copertura (superficie dell’isolante, intercapedine ventilata, manto) raggiungano temperature molto elevate per il fenomeno del “disaccoppiamento termico” dell’isolante, con conseguenti problemi di durabilità dei materiali e di prestazione dei componenti stessi. Nonostante le modeste velocità dell’aria rilevate nelle intercapedini sottomanto, si è confermato come la ventilazione, realizzata anche solo attraverso l’utilizzo di manti permeabili all’aria e dalle moderate proprietà radiative, sia una strategia assolutamente efficace per il raffrescamento passivo della copertura, tuttavia investire su elevate intercapedini, in accordo con la teoria classica di ventilazione, risulta poco rilevante. L'uso della massa termica nei solai si rivela una strategia molto performante, sia in termini di riduzione di energia entrante in fase estiva (fino al 19% in meno), sia per il risparmio energetico connesso alla sua risposta dinamica ai carichi termici interni in fase invernale. La combinazione di queste strategie con una barriera radiante sovrapposta all’isolante dà invece un beneficio trascurabile se le coperture sono già fortemente isolate. Dati questi risultati, si è tentato di definire delle soluzioni costruttive “equivalenti” in termini di prestazione termica, che siano adeguate al nostro contesto climatico e che sappiano anche rileggere elementi costruttivi della tradizione. La ricerca si conclude con una rivisitazione delle attuali prescrizioni normative in chiave maggiormente “prestazionale”, e meno “prescrittiva”, e suggerendo soluzioni costruttive alternative all’“iperisolamento” dell’involucro, nei climi più caldi e temperati del nostro paese.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/241939 Collegamento a IRIS

2011
La progettazione energetica delle coperture: valutazione sperimentale ed analitica di coperture “iperisolate” in clima caldo e temperato
L’attività di Ricerca nel Dottorato, verso un sapere tecnico condiviso
Autore/i: DI GIUSEPPE, Elisa
Editore: Aton
Luogo di pubblicazione: Roma
Classificazione: 2 Contributo in Volume
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/243177 Collegamento a IRIS

2011
The Physics of Vented Roofs in Hot and Temperate climates: Analysis of Different Strategies for the Reduction of Energy Consumption and the Improvement of Environmental Comfort
Energy and Buildings: Efficiency, Air Quality and Conservation
Autore/i: D'Orazio, Marco; Stazi, Alessandro; DI PERNA, Costanzo; DI GIUSEPPE, Elisa
Editore: Nova Science Publishers Inc.
Classificazione: 2 Contributo in Volume
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/25827 Collegamento a IRIS

2010
The effects of roof covering on the thermal performance of highly insulated roofs in Mediterranean climates
ENERGY AND BUILDINGS
Autore/i: D'Orazio, M.; Di Perna, C.; Di Giuseppe, E.
Classificazione: 1 Contributo su Rivista
Abstract: While the EU Directive 2002/91/CE on the Energy Performance of Buildings (EPBD) clearly establishes regulations for the thermal insulation of buildings for saving energy in winter, the summer strategy is described by a little more than qualitative provisions. As a consequence, in the national requirements, the high insulation of the building envelope is considered as the principal strategy to control energy consumption even in summer, regardless of the different climates. This approach leads to a homologation of the building trade, and imposes construction technology and materials which do not adhere to the traditional way of making buildings, like in Southern Europe. Here, the “over insulation” of buildings runs the risk of reducing the effectiveness of traditional passive cooling strategies (thermal mass, air permeability of the roof covering, roof ventilation) and could have adverse effects on internal comfort. In this paper, we focus on the effects of over insulation on the thermal performance of roofs in summer, by analyzing experimental data from monitoring a full-scale mock-up in Italy. Results show how an increase in insulation thickness reduces the effectiveness of traditional passive cooling strategies, as an effect of the thermal decoupling between the interior and the upper layers of the roofs.
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/244839 Collegamento a IRIS

2009
Iperisolare conviene?
L'INDUSTRIA DEI LATERIZI
Autore/i: Orciari, Angela; DI GIUSEPPE, Elisa
Editore: Gruppo Editoriale Faenza Editrice:via Pier de Crescenzi 44, I 48018 Faenza Italy:011 39 0546 670111, EMAIL: info@faenza.com, Fax: 011 39 0546 660440
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/30797 Collegamento a IRIS

2009
Influenza delle proprietà radiative del manto sul comportamento termico di sistemi di copertura
COSTRUIRE IN LATERIZIO
Autore/i: DI GIUSEPPE, Elisa; Orciari, Angela; D'Orazio, Marco; DI PERNA, Costanzo
Editore: Gruppo Editoriale Faenza Editrice:via Pier de Crescenzi 44, I 48018 Faenza Italy:011 39 0546 670111, EMAIL: info@faenza.com, Fax: 011 39 0546 660440
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/30798 Collegamento a IRIS

2009
Influenza delle proprietà radiative del manto sul comportamento termico di sistemi di copertura
L'INDUSTRIA DEI LATERIZI
Autore/i: Orciari, Angela; DI GIUSEPPE, Elisa
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/244804 Collegamento a IRIS

2009
Iperisolare conviene?
COSTRUIRE IN LATERIZIO
Autore/i: DI GIUSEPPE, Elisa; Orciari, Angela
Classificazione: 1 Contributo su Rivista
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/244803 Collegamento a IRIS

2009
Comportamento termico di coperture ventilate in clima mediterraneo: analisi di diverse strategie per la riduzione dei consumi energetici e il miglioramento del comfort ambientale
L’attività di Ricerca nel Dottorato
Autore/i: DI GIUSEPPE, Elisa
Editore: Alinea
Classificazione: 2 Contributo in Volume
Scheda della pubblicazione: https://iris.univpm.it/handle/11566/243178 Collegamento a IRIS




Università Politecnica delle Marche

P.zza Roma 22, 60121 Ancona
Tel (+39) 071.220.1, Fax (+39) 071.220.2324
P.I. 00382520427