Energy, Environmental Impact and Indoor Environmental Quality of Add-Ons in Buildings

Margherita Mastellone, Silvia Ruggiero, Dimitra Papadaki, Nikolaos Barmparesos, Anastasia Fotopoulou, Annarita Ferrante and Margarita Niki Assimakopoulos
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Margherita Mastellone: Department of Architecture (DiARC), University of Naples, Via Toledo, 402, 80134 Napoli, Italy
Silvia Ruggiero: Department of Engineering (DING), University of Sannio, Piazza Roma, 21, 82100 Benevento, Italy
Dimitra Papadaki: Group of Building Environmental Studies, Physics Department, University of Athens, 15784 Athens, Greece
Nikolaos Barmparesos: Group of Building Environmental Studies, Physics Department, University of Athens, 15784 Athens, Greece
Anastasia Fotopoulou: Department of Architecture (DA), University of Bologna, 40100 Bologna, Italy
Annarita Ferrante: Department of Architecture (DA), University of Bologna, 40100 Bologna, Italy
Margarita Niki Assimakopoulos: Group of Building Environmental Studies, Physics Department, University of Athens, 15784 Athens, Greece

Sustainability, 2022, vol. 14, issue 13, 1-29

Abstract: On a European scale, the existing building stock has poor energy performance and particularly vulnerable structures. Indeed, most of the existing buildings were built before the introduction of energy standards and under structural safety criteria different from those currently required. It is therefore necessary the intervention in existing buildings according to an integrated approach that contemplates both the structural safety and the energy efficiency of buildings. This study, consistently with the objectives of the European research project “Proactive synergy of integrated Efficient Technologies on buildings’ Envelopes (Pro-GET-OnE)”, proposes a retrofit intervention for a student dormitory of the National and Kapodistrian University of Athens. The scope of the evaluation is to understand how an integrated intervention, that implies a structural and energy retrofit, as well as a spatial redistribution, leads to an improvement of the Indoor Environmental Quality (IEQ). In detail, the structural retrofit was performed through exoskeleton that leads to the addition of new living spaces and to a remodeling of the building facades. The energy retrofit regarded all three levers of energy efficiency, and thus the building envelope, the microclimatic control systems, and the systems from renewable sources. The integrated intervention, in addition to a reduction of energy demand, has led to advantages in terms of IEQ. Thermal comfort, both during summer and winter, is improved and the hours of suitable CO 2 concentration pass from 34% in the pre-retrofit stage up to 100% in the post retrofit stage.

Keywords: indoor air quality; thermal comfort; energy refurbishment; dynamic simulations; structure exoskeleton (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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