Comparison of indices for evaluating building green values based on greenhouse gas emission reductions

The rapid increase of the amount of impervious surfaces in urban areas has generated heat islands and other adverse environmental impacts that subsequently increase greenhouse gas (GHG) emissions. Local governments are now looking for an index to encourage building owners to increase green areas, in...

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Autores principales:	By Tze-Chin Pan, Jehng-Jung Kao
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Building green value Greenhouse gas emission reduction Green roof Green wall Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/56e5be2fbe874b5bba5c69134fafa860
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spelling	oai:doaj.org-article:56e5be2fbe874b5bba5c69134fafa8602021-12-01T04:39:38ZComparison of indices for evaluating building green values based on greenhouse gas emission reductions1470-160X10.1016/j.ecolind.2020.107228https://doaj.org/article/56e5be2fbe874b5bba5c69134fafa8602021-03-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X20311675https://doaj.org/toc/1470-160XThe rapid increase of the amount of impervious surfaces in urban areas has generated heat islands and other adverse environmental impacts that subsequently increase greenhouse gas (GHG) emissions. Local governments are now looking for an index to encourage building owners to increase green areas, including green roofs and green walls. Currently, several building green value (BGV) indices can be used to assess building greenness, including the green coverage ratio (GCR), biotope area factor (BAF), green factor (GF), and green plot ratio (GnPR). However, these indices use different sub-indexes and weights, such that the values they output vary significantly. To analyze their applicability, this study compares output values of the BGV indices and estimated GHG emission reductions for three typical buildings under three conditions: no green roof or green wall; a green roof; and a green roof and green walls. The GCR does not include green walls and thus cannot reflect reductions in GHG emissions from green walls. The BAF values are highly correlated to associated GHG emission reductions. The trend of GF values vs. associated GHG emission reductions is less consistent than that using the BAF method because the weights of GF are not consistent with associated thermal resistance improvements. The correlation between GnPR values and associated GHG emission reductions is the strongest among all BGV indices because the ratio of leaf area indexes for green roofs to that of green walls is close to the ratio of U-value reductions from green roofs and green walls.By Tze-Chin PanJehng-Jung KaoElsevierarticleBuilding green valueGreenhouse gas emission reductionGreen roofGreen wallEcologyQH540-549.5ENEcological Indicators, Vol 122, Iss , Pp 107228- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Building green value Greenhouse gas emission reduction Green roof Green wall Ecology QH540-549.5
spellingShingle	Building green value Greenhouse gas emission reduction Green roof Green wall Ecology QH540-549.5 By Tze-Chin Pan Jehng-Jung Kao Comparison of indices for evaluating building green values based on greenhouse gas emission reductions
description	The rapid increase of the amount of impervious surfaces in urban areas has generated heat islands and other adverse environmental impacts that subsequently increase greenhouse gas (GHG) emissions. Local governments are now looking for an index to encourage building owners to increase green areas, including green roofs and green walls. Currently, several building green value (BGV) indices can be used to assess building greenness, including the green coverage ratio (GCR), biotope area factor (BAF), green factor (GF), and green plot ratio (GnPR). However, these indices use different sub-indexes and weights, such that the values they output vary significantly. To analyze their applicability, this study compares output values of the BGV indices and estimated GHG emission reductions for three typical buildings under three conditions: no green roof or green wall; a green roof; and a green roof and green walls. The GCR does not include green walls and thus cannot reflect reductions in GHG emissions from green walls. The BAF values are highly correlated to associated GHG emission reductions. The trend of GF values vs. associated GHG emission reductions is less consistent than that using the BAF method because the weights of GF are not consistent with associated thermal resistance improvements. The correlation between GnPR values and associated GHG emission reductions is the strongest among all BGV indices because the ratio of leaf area indexes for green roofs to that of green walls is close to the ratio of U-value reductions from green roofs and green walls.
format	article
author	By Tze-Chin Pan Jehng-Jung Kao
author_facet	By Tze-Chin Pan Jehng-Jung Kao
author_sort	By Tze-Chin Pan
title	Comparison of indices for evaluating building green values based on greenhouse gas emission reductions
title_short	Comparison of indices for evaluating building green values based on greenhouse gas emission reductions
title_full	Comparison of indices for evaluating building green values based on greenhouse gas emission reductions
title_fullStr	Comparison of indices for evaluating building green values based on greenhouse gas emission reductions
title_full_unstemmed	Comparison of indices for evaluating building green values based on greenhouse gas emission reductions
title_sort	comparison of indices for evaluating building green values based on greenhouse gas emission reductions
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/56e5be2fbe874b5bba5c69134fafa860
work_keys_str_mv	AT bytzechinpan comparisonofindicesforevaluatingbuildinggreenvaluesbasedongreenhousegasemissionreductions AT jehngjungkao comparisonofindicesforevaluatingbuildinggreenvaluesbasedongreenhousegasemissionreductions
_version_	1718405808686891008

Comparison of indices for evaluating building green values based on greenhouse gas emission reductions

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