A Staged Approach for Energy Retrofitting an Old Service Building: A Cost-Optimal Assessment

Office buildings built before the pre-1960 age constitute a relevant group for analyzing the energy performance of the Portuguese building sector. A dynamic energy simulation was used to assess the energy performance of an existing office building located in the town of Bragança, Portugal. By using...

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Autores principales:	Jorge Lopes, Rui A. F. Oliveira, Nerija Banaitiene, Audrius Banaitis
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	building retrofitting cost-optimality dynamic energy simulation economic assessment energy performance staged renovation Technology T
Acceso en línea:	https://doaj.org/article/e53ced1a8f4d46b9b82046dd87e1fc7d
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spelling	oai:doaj.org-article:e53ced1a8f4d46b9b82046dd87e1fc7d2021-11-11T15:45:36ZA Staged Approach for Energy Retrofitting an Old Service Building: A Cost-Optimal Assessment10.3390/en142169291996-1073https://doaj.org/article/e53ced1a8f4d46b9b82046dd87e1fc7d2021-10-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/21/6929https://doaj.org/toc/1996-1073Office buildings built before the pre-1960 age constitute a relevant group for analyzing the energy performance of the Portuguese building sector. A dynamic energy simulation was used to assess the energy performance of an existing office building located in the town of Bragança, Portugal. By using a staged renovation approach, two passive technologies applied to the building envelope and an efficient domestic hot water system were selected and a financial evaluation through the net saving (NS) method was undertaken to choose the best efficiency measures/packages for improving the building’s energy performance. Real discount rates of 3% and 1% were used in the financial evaluation. Considering the real discount rate of 3%, the results showed that only two out seven retrofit options had a positive financial return. By using the real discount rate of 1%, all retrofit options were found to be financially efficient. The results of the study corroborated those of earlier works that found that the financial profitability of energy renovation investments is very sensitive to the discount rate used in the analysis. The results of the study also suggested that the staged renovation approach used in the analysis is economically feasible, and that this approach is an alternative to one-step renovation approach to help to achieve the country´s energy and climate targets by 2030. Suggestions for future research conducted for office buildings in the different climate zones and other age groups in Portugal are proposed.Jorge LopesRui A. F. OliveiraNerija BanaitieneAudrius BanaitisMDPI AGarticlebuilding retrofittingcost-optimalitydynamic energy simulationeconomic assessmentenergy performancestaged renovationTechnologyTENEnergies, Vol 14, Iss 6929, p 6929 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	building retrofitting cost-optimality dynamic energy simulation economic assessment energy performance staged renovation Technology T
spellingShingle	building retrofitting cost-optimality dynamic energy simulation economic assessment energy performance staged renovation Technology T Jorge Lopes Rui A. F. Oliveira Nerija Banaitiene Audrius Banaitis A Staged Approach for Energy Retrofitting an Old Service Building: A Cost-Optimal Assessment
description	Office buildings built before the pre-1960 age constitute a relevant group for analyzing the energy performance of the Portuguese building sector. A dynamic energy simulation was used to assess the energy performance of an existing office building located in the town of Bragança, Portugal. By using a staged renovation approach, two passive technologies applied to the building envelope and an efficient domestic hot water system were selected and a financial evaluation through the net saving (NS) method was undertaken to choose the best efficiency measures/packages for improving the building’s energy performance. Real discount rates of 3% and 1% were used in the financial evaluation. Considering the real discount rate of 3%, the results showed that only two out seven retrofit options had a positive financial return. By using the real discount rate of 1%, all retrofit options were found to be financially efficient. The results of the study corroborated those of earlier works that found that the financial profitability of energy renovation investments is very sensitive to the discount rate used in the analysis. The results of the study also suggested that the staged renovation approach used in the analysis is economically feasible, and that this approach is an alternative to one-step renovation approach to help to achieve the country´s energy and climate targets by 2030. Suggestions for future research conducted for office buildings in the different climate zones and other age groups in Portugal are proposed.
format	article
author	Jorge Lopes Rui A. F. Oliveira Nerija Banaitiene Audrius Banaitis
author_facet	Jorge Lopes Rui A. F. Oliveira Nerija Banaitiene Audrius Banaitis
author_sort	Jorge Lopes
title	A Staged Approach for Energy Retrofitting an Old Service Building: A Cost-Optimal Assessment
title_short	A Staged Approach for Energy Retrofitting an Old Service Building: A Cost-Optimal Assessment
title_full	A Staged Approach for Energy Retrofitting an Old Service Building: A Cost-Optimal Assessment
title_fullStr	A Staged Approach for Energy Retrofitting an Old Service Building: A Cost-Optimal Assessment
title_full_unstemmed	A Staged Approach for Energy Retrofitting an Old Service Building: A Cost-Optimal Assessment
title_sort	staged approach for energy retrofitting an old service building: a cost-optimal assessment
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/e53ced1a8f4d46b9b82046dd87e1fc7d
work_keys_str_mv	AT jorgelopes astagedapproachforenergyretrofittinganoldservicebuildingacostoptimalassessment AT ruiafoliveira astagedapproachforenergyretrofittinganoldservicebuildingacostoptimalassessment AT nerijabanaitiene astagedapproachforenergyretrofittinganoldservicebuildingacostoptimalassessment AT audriusbanaitis astagedapproachforenergyretrofittinganoldservicebuildingacostoptimalassessment AT jorgelopes stagedapproachforenergyretrofittinganoldservicebuildingacostoptimalassessment AT ruiafoliveira stagedapproachforenergyretrofittinganoldservicebuildingacostoptimalassessment AT nerijabanaitiene stagedapproachforenergyretrofittinganoldservicebuildingacostoptimalassessment AT audriusbanaitis stagedapproachforenergyretrofittinganoldservicebuildingacostoptimalassessment
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A Staged Approach for Energy Retrofitting an Old Service Building: A Cost-Optimal Assessment

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