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A comparison of an energy/economic-based against an exergoeconomic-based multi-objective optimisation for low carbon building energy design

A comparison of an energy/economic-based against an exergoeconomic-based multi-objective optimisation for low carbon building energy design

García Kerdan, Iván ORCID: 0000-0002-0566-555X, Raslan, Rokia, Ruyssevelt, Paul and Morillón Gálvez, David (2017) A comparison of an energy/economic-based against an exergoeconomic-based multi-objective optimisation for low carbon building energy design. Energy, 128. pp. 244-263. ISSN 0360-5442 (Print), 1873-6785 (Online) (doi:https://doi.org/10.1016/j.energy.2017.03.142)

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Abstract

This study presents a comparison of the optimisation of building energy retrofit strategies from two different perspectives: an energy/economic-based analysis and an exergy/exergoeconomic-based analysis. A recently retrofitted community centre is used as a case study. ExRET-Opt, a novel building energy/exergy simulation tool with multi-objective optimisation capabilities based on NSGA-II is used to run both analysis. The first analysis, based on the 1st Law only, simultaneously optimises building energy use and design's Net Present Value (NPV). The second analysis, based on the 1st and the 2nd Laws, simultaneously optimises exergy destructions and the exergoeconomic cost-benefit index. Occupant thermal comfort is considered as a common objective function for both approaches. The aim is to assess the difference between the methods and calculate the performance among main indicators, considering the same decision variables and constraints. Outputs show that the inclusion of exergy/exergoeconomics as objective functions into the optimisation procedure has resulted in similar 1st Law and thermal comfort outputs, while providing solutions with less environmental impact under similar capital investments. This outputs demonstrate how the 1st Law is only a necessary calculation while the utilisation of the 1st and 2nd Laws becomes a sufficient condition for the analysis and design of low carbon buildings.

Item Type: Article
Uncontrolled Keywords: optimisation, building simulation, energy, exergy, low carbon buildings, exergoeconomics
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: 22 Nov 2019 14:27
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/25818

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