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Thermodynamic and exergoeconomic analysis of a non-domestic Passivhaus retrofit

Garcia Kerdan, I; Raslan, R; Ruyssevelt, P; Vaiciulyte, S; Morillon Galvez, D; (2017) Thermodynamic and exergoeconomic analysis of a non-domestic Passivhaus retrofit. Building and Environment , 117 pp. 100-117. 10.1016/j.buildenv.2017.03.003. Green open access

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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.

Type: Article
Title: Thermodynamic and exergoeconomic analysis of a non-domestic Passivhaus retrofit
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.buildenv.2017.03.003
Publisher version: http://dx.doi.org/10.1016/j.buildenv.2017.03.003
Language: English
Additional information: © 2017 Elsevier Ltd. All rights reserved. This manuscript version is made available under a Creative Commons Attribution Non-commercial Non-derivative 4.0 International license (CC BY-NC-ND 4.0). This license allows you to share, copy, distribute and transmit the work for personal and non-commercial use providing author and publisher attribution is clearly stated. Further details about CC BY licenses are available at https://creativecommons.org/licenses/. Access may be initially restricted by the publisher.
Keywords: Exergy, thermoeconomics, building energy performance, Passivhaus, energy retrofit, low carbon building, building simulation, modelling
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of the Built Environment
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of the Built Environment > Bartlett School Env, Energy and Resources
URI: https://discovery.ucl.ac.uk/id/eprint/1544083
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