Efficiency assessment in co-production systems based on modified emergy accounting approach

Emergy accounting in a system with co-production branch is of great scientific interest since each branch corresponds to a different transformity value. In previous studies, limitations associated with emergy accounting in co-production systems have been highlighted where some “inputs” have to be ad...

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Autores principales:	Keshab Shrestha, Izhar Hussain Shah, Zhe Liu, Hung-Suck Park
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Emergy Co-production system Modified physical quantity method Transformity Efficiency assessment Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/163d0766878d4ca6bbbaf01291e7266b
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spelling	oai:doaj.org-article:163d0766878d4ca6bbbaf01291e7266b2021-12-01T04:50:58ZEfficiency assessment in co-production systems based on modified emergy accounting approach1470-160X10.1016/j.ecolind.2021.107675https://doaj.org/article/163d0766878d4ca6bbbaf01291e7266b2021-07-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X2100340Xhttps://doaj.org/toc/1470-160XEmergy accounting in a system with co-production branch is of great scientific interest since each branch corresponds to a different transformity value. In previous studies, limitations associated with emergy accounting in co-production systems have been highlighted where some “inputs” have to be added to obtain a “useful” product from a “co-product” – giving rise to inaccuracies in the emergy accounting process. To address these methodological aspects of emergy assessment in co-production systems, a modified physical quantity method (MPQM) – that goes in line with the standard emergy algebra – has been proposed in order to provide a different perspective for accounting co-products efficiency. The robustness of MPQM has been verified by taking the case study of Eucalyptus pulp production and a comparison is made against conventional and energy/exergy weighting methods. As per the results, MPQM was able to provide accurate results for co-production systems as compared with other emergy accounting methods. However, the case of Eucalyptus pulp production was found to be “inefficient” following the MPQM approach. These findings are expected to strengthen the methodological aspects of emergy accounting based on the physical quantity criterion.Keshab ShresthaIzhar Hussain ShahZhe LiuHung-Suck ParkElsevierarticleEmergyCo-production systemModified physical quantity methodTransformityEfficiency assessmentEcologyQH540-549.5ENEcological Indicators, Vol 126, Iss , Pp 107675- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Emergy Co-production system Modified physical quantity method Transformity Efficiency assessment Ecology QH540-549.5
spellingShingle	Emergy Co-production system Modified physical quantity method Transformity Efficiency assessment Ecology QH540-549.5 Keshab Shrestha Izhar Hussain Shah Zhe Liu Hung-Suck Park Efficiency assessment in co-production systems based on modified emergy accounting approach
description	Emergy accounting in a system with co-production branch is of great scientific interest since each branch corresponds to a different transformity value. In previous studies, limitations associated with emergy accounting in co-production systems have been highlighted where some “inputs” have to be added to obtain a “useful” product from a “co-product” – giving rise to inaccuracies in the emergy accounting process. To address these methodological aspects of emergy assessment in co-production systems, a modified physical quantity method (MPQM) – that goes in line with the standard emergy algebra – has been proposed in order to provide a different perspective for accounting co-products efficiency. The robustness of MPQM has been verified by taking the case study of Eucalyptus pulp production and a comparison is made against conventional and energy/exergy weighting methods. As per the results, MPQM was able to provide accurate results for co-production systems as compared with other emergy accounting methods. However, the case of Eucalyptus pulp production was found to be “inefficient” following the MPQM approach. These findings are expected to strengthen the methodological aspects of emergy accounting based on the physical quantity criterion.
format	article
author	Keshab Shrestha Izhar Hussain Shah Zhe Liu Hung-Suck Park
author_facet	Keshab Shrestha Izhar Hussain Shah Zhe Liu Hung-Suck Park
author_sort	Keshab Shrestha
title	Efficiency assessment in co-production systems based on modified emergy accounting approach
title_short	Efficiency assessment in co-production systems based on modified emergy accounting approach
title_full	Efficiency assessment in co-production systems based on modified emergy accounting approach
title_fullStr	Efficiency assessment in co-production systems based on modified emergy accounting approach
title_full_unstemmed	Efficiency assessment in co-production systems based on modified emergy accounting approach
title_sort	efficiency assessment in co-production systems based on modified emergy accounting approach
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/163d0766878d4ca6bbbaf01291e7266b
work_keys_str_mv	AT keshabshrestha efficiencyassessmentincoproductionsystemsbasedonmodifiedemergyaccountingapproach AT izharhussainshah efficiencyassessmentincoproductionsystemsbasedonmodifiedemergyaccountingapproach AT zheliu efficiencyassessmentincoproductionsystemsbasedonmodifiedemergyaccountingapproach AT hungsuckpark efficiencyassessmentincoproductionsystemsbasedonmodifiedemergyaccountingapproach
_version_	1718405709626867712

Efficiency assessment in co-production systems based on modified emergy accounting approach

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