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Thermodynamic and exergoeconomic analysis of a non-domestic Passivhaus retrofit

Thermodynamic and exergoeconomic analysis of a non-domestic Passivhaus retrofit

García Kerdan, Iván ORCID: 0000-0002-0566-555X, Raslan, Rokia, Ruyssevelt, Paul, Vaiciulyte, Sandra and Morillón Gálvez, David (2017) Thermodynamic and exergoeconomic analysis of a non-domestic Passivhaus retrofit. Building and Environment, 117. pp. 100-117. ISSN 0360-1323 (Print), 1873-684X (Online) (doi:https://doi.org/10.1016/j.buildenv.2017.03.003)

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Abstract

This paper presents a thermodynamic and exergoeconomic analysis of a recently-retrofitted Passivhaus non-domestic building. The selected case study, a Community Centre located in London, underwent a deep-energy retrofit in 2011, becoming the first ‘non-domestic Passivhaus’ retrofit in the country. As the building was retrofitted per Passivhaus standards, which is based solely on First Law analysis, a thermodynamic investigation can provide a novel means by which to assess its exergy efficiency and cost-effectiveness. As such, the aim of this paper is to conduct a comprehensive exergy and exergoeconomic analysis, presenting novel performance indicators for the pre-retrofit and post-retrofit Passivhaus building. First law outputs show that the improvement presents high levels of energy savings (75.6%), reductions in carbon emissions (64.5%), and occupant thermal comfort improvement (28.8%). Second law outputs present a reduction in primary exergy input reduction of 56.4% and exergy destructions of 60.4%, leading to improve building exergy efficiency from 9.8% to 18.0%. Nevertheless, exergoeconomically the building did not perform as expected due to high capital cost and exergy destructions cost rates. These results give an insight into the thermodynamic impact of the Passivhaus approach, providing a critical assessment of the strengths and limitations of the standard under both thermodynamic laws.

Item Type: Article
Uncontrolled Keywords: energy, exergy, exergoeconomics, retrofits, building simulation, passivhaus
Subjects: T Technology > TD Environmental technology. Sanitary engineering
T Technology > TH Building construction
Faculty / Department / Research Group: Faculty of Liberal Arts & Sciences
Faculty of Liberal Arts & Sciences > Department of Built Environment
Last Modified: 07 Nov 2019 15:35
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
Selected for GREAT 2019: None
URI: http://gala.gre.ac.uk/id/eprint/25819

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