The Experts below are selected from a list of 402 Experts worldwide ranked by ideXlab platform
G Q Chen - One of the best experts on this subject based on the ideXlab platform.
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Ecological accounting for an integrated "pig-biogas-fish" system based on emergetic indicators
Ecological Indicators, 2014Co-Authors: X F Wu, X. H. Xia, T. Mi, X D Wu, J.s. Li, G Q ChenAbstract:With the expansion of urbanization in China, the integrated biogas-utilization system has gained its popularity for both renewable energy production and multi-level utilization of organic waste. To appraise the ecological performance of the integrated biogas system, systematic accounting is undertaken for an integrated "pig-biogas-fish" system in Hubei province, China. Based on Odum's concept of embodied solar energy as a unified measure for environmental resources, human labors and purchased goods, a set of emergetic indicators are employed to quantify the system sustainability. The results reveal that in a 20-year designed lifetime scenario, 94.69% of the total emergy inputs for the "pig-biogas-fish" system are attributed to purchased social resources. Three kinds of products, namely pig, biogas, fish are taken into consideration, and Transformity of the "pig-biogas-fish" system is calculated as 1.26E + 05 seJ/J. Compared with the Chinese conventional agriculture system, the integrated biogas system shows a higher sustainability. Given that most biogas systems have a lifespan less than 20 years, for the "pig-biogas-fish" system, six other scenarios with different lifespans are studied to investigate the impact of the lifespan on sustainability. The findings suggest that the "pig-biogas-fish" system should be well operated for at least 8 years to prove its advantage in ecological economy over the conventional agriculture system. This has essential policy implications that local government should strengthen subsequent management on biogas production to extend the practical service life of the biogas system.
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environmental sustainability of wind power an emergy analysis of a chinese wind farm
Renewable & Sustainable Energy Reviews, 2013Co-Authors: Qing Yang, G Q Chen, S Liao, Y H Zhao, H W Peng, Huanxin ChenAbstract:After a decade of astonishing growth of wind power capacity worldwide, sustainable utilization of wind energy resources has become an issue of utmost importance. For a comprehensive assessment of the environmental sustainability of a wind power, basic emergy flow diagram and emergy indices are presented in this paper to aggregate various renewable/nonrenewable local resources and purchased economic inputs associated with a wind power system, with concrete illustration by a case study of a modern wind farm in Guangxi, China. It is revealed that the solar Transformity of wind electricity is the lowest among typical electricity generation technologies. Emergy-based indices are then calculated to provide integrated information of the investigated wind farm from an ecological point of view. Comparison between the results with existing data for other renewable energy systems reflects the substantial advantages of wind power technology over solar thermal power and photovoltaic technologies in terms of sustainability and ecological cost. Nevertheless, biomass-derived fuels, especially biogas by anaerobic digestion, show a better ecological performance and environmental sustainability than wind and solar technologies. In addition, potential for improvements of Chinese wind farm are identified by optimization effort in human labor, land use and waste treatment.
Chen G. Q. - One of the best experts on this subject based on the ideXlab platform.
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Renewability assessment of a production system: Based on embodied energy as emergy
RENEWABLE & SUSTAINABLE ENERGY REVIEWS, 2016Co-Authors: Shao Ling, Chen G. Q.Abstract:Based on a comprehensive review of previous renewability assessment studies, the present work contributes a framework to assess the renewability of a production system based on the systems ecological concept of embodied energy as emergy (embodied solar energy). An input-output analysis based Transformity database is adopted to concretely trace the renewable and nonrenewable resources embodied in the supply chain for all product materials. A renewability index as the percentage of total renewable resources over the total resources used for the production process is devised to assess the renewability of a production system. The renewability assessment of a typical wastewater treatment system in Beijing is performed as a case study to illustrate the framework in context of water-energy nexus. The renewability index of the case system is evaluated around 13%, and fossil energy is revealed as a key source for total resources use. The presented framework is shown to have broad application prospects and can be very useful in sustainability studies. (C) 2015 Elsevier Ltd. All rights reserved.National Natural Science Foundation of China [71503236, 11272012]; State Key Program for Basic Research of China (973 Program) [2013 CB430402]; Fundamental Research Funds for the Central Universities [2652015151]SCI(E)EIREVIEWlingshao@pku.edu.cn; gqchen@pku.edu.cn380-3925
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Ecological accounting for an integrated "pig-biogas-fish" system based on emergetic indicators
ecological indicators, 2014Co-Authors: Wu X. F., Chen G. Q., Chen B., Yang Q., Wu X. D., Li J. S., Xia X. H., Mi T., Hayatf T., Alsaedi A.Abstract:With the expansion of urbanization in China, the integrated biogas-utilization system has gained its popularity for both renewable energy production and multi-level utilization of organic waste. To appraise the ecological performance of the integrated biogas system, systematic accounting is undertaken for an integrated "pig-biogas-fish" system in Hubei province, China. Based on Odum's concept of embodied solar energy as a unified measure for environmental resources, human labors and purchased goods, a set of emergetic indicators are employed to quantify the system sustainability. The results reveal that in a 20-year designed lifetime scenario, 94.69% of the total emergy inputs for the "pig-biogas-fish" system are attributed to purchased social resources. Three kinds of products, namely pig, biogas, fish are taken into consideration, and Transformity of the "pig-biogas-fish" system is calculated as 1.26E + 05 seJ/J. Compared with the Chinese conventional agriculture system, the integrated biogas system shows a higher sustainability. Given that most biogas systems have a lifespan less than 20 years, for the "pig-biogas-fish" system, six other scenarios with different lifespans are studied to investigate the impact of the lifespan on sustainability. The findings suggest that the "pig-biogas-fish" system should be well operated for at least 8 years to prove its advantage in ecological economy over the conventional agriculture system. This has essential policy implications that local government should strengthen subsequent management on biogas production to extend the practical service life of the biogas system. (C) 2014 Elsevier Ltd. All rights reserved.http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000343853000022&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701Biodiversity ConservationEnvironmental SciencesSCI(E)EISSCI11ARTICLEqyang@mail.hust.edu.cn; aalsaedi@hotmail.com,SI189-1974
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Environmental sustainability of wind power: An emergy analysis of a Chinese wind farm
renewable sustainable energy reviews, 2013Co-Authors: Yang Q., Chen G. Q., Liao S., Zhao Y. H., Peng H. W., Chen H. P.Abstract:After a decade of astonishing growth of wind power capacity worldwide, sustainable utilization of wind energy resources has become an issue of utmost importance. For a comprehensive assessment of the environmental sustainability of a wind power, basic emergy flow diagram and emergy indices are presented in this paper to aggregate various renewable/nonrenewable local resources and purchased economic inputs associated with a wind power system, with concrete illustration by a case study of a modern wind farm in Guangxi, China. It is revealed that the solar Transformity of wind electricity is the lowest among typical electricity generation technologies. Emergy-based indices are then calculated to provide integrated information of the investigated wind farm from an ecological point of view. Comparison between the results with existing data for other renewable energy systems reflects the substantial advantages of wind power technology over solar thermal power and photovoltaic technologies in terms of sustainability and ecological cost. Nevertheless, biomass-derived fuels, especially biogas by anaerobic digestion, show a better ecological performance and environmental sustainability than wind and solar technologies. In addition, potential for improvements of Chinese wind farm are identified by optimization effort in human labor, land use and waste treatment. Crown Copyright (C) 2013 Published by Elsevier Ltd. All rights reserved.http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000325830900018&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701Energy & FuelsSCI(E)EISSCI19REVIEW229-2392
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Exergetic assessment for ecological economic system: Chinese agriculture
ecological modelling, 2009Co-Authors: Chen G. Q., Jiang M. M., Yang Z. F., Chen B., Zhou J. B.Abstract:Based on the thermodynamic concept of exergy as a unified measure for environmental resources and economic products, a framework for systems assessment is presented for ecological economies. With a typical systems diagram devised for a general ecological economy with four arm fluxes for free local natural resources, purchased economic investment, environmental impact and economic yield, system indices of the renewability index, exergy yield ratio, exergy investment ratio, environmental resource to yield ratio, system Transformity and environmental stress index are defined for a congregated systems ecological assessment with essential implications to sustainability. As a detailed case study to the Chinese agriculture from 1980 to 2000 with cropping, forestry, stockbreeding and fishery sectors, extensive exergy account and systems assessment are carried out with emphasis on annual and structural variations against social political transitions. For the overall agriculture as a congregated ecological stage, the value of the system Transformity is found around 10, the typical value for the general ecological hierarchy as well devised by Odum associated with Lindeman's Tenth Law. (C) 2008 Elsevier B.V All rights reserved.http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000263209400011&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701EcologySCI(E)EI27ARTICLE3397-41022
Alsaedi A. - One of the best experts on this subject based on the ideXlab platform.
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Ecological accounting for an integrated "pig-biogas-fish" system based on emergetic indicators
ecological indicators, 2014Co-Authors: Wu X. F., Chen G. Q., Chen B., Yang Q., Wu X. D., Li J. S., Xia X. H., Mi T., Hayatf T., Alsaedi A.Abstract:With the expansion of urbanization in China, the integrated biogas-utilization system has gained its popularity for both renewable energy production and multi-level utilization of organic waste. To appraise the ecological performance of the integrated biogas system, systematic accounting is undertaken for an integrated "pig-biogas-fish" system in Hubei province, China. Based on Odum's concept of embodied solar energy as a unified measure for environmental resources, human labors and purchased goods, a set of emergetic indicators are employed to quantify the system sustainability. The results reveal that in a 20-year designed lifetime scenario, 94.69% of the total emergy inputs for the "pig-biogas-fish" system are attributed to purchased social resources. Three kinds of products, namely pig, biogas, fish are taken into consideration, and Transformity of the "pig-biogas-fish" system is calculated as 1.26E + 05 seJ/J. Compared with the Chinese conventional agriculture system, the integrated biogas system shows a higher sustainability. Given that most biogas systems have a lifespan less than 20 years, for the "pig-biogas-fish" system, six other scenarios with different lifespans are studied to investigate the impact of the lifespan on sustainability. The findings suggest that the "pig-biogas-fish" system should be well operated for at least 8 years to prove its advantage in ecological economy over the conventional agriculture system. This has essential policy implications that local government should strengthen subsequent management on biogas production to extend the practical service life of the biogas system. (C) 2014 Elsevier Ltd. All rights reserved.http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000343853000022&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701Biodiversity ConservationEnvironmental SciencesSCI(E)EISSCI11ARTICLEqyang@mail.hust.edu.cn; aalsaedi@hotmail.com,SI189-1974
Yang Q. - One of the best experts on this subject based on the ideXlab platform.
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Ecological accounting for an integrated "pig-biogas-fish" system based on emergetic indicators
ecological indicators, 2014Co-Authors: Wu X. F., Chen G. Q., Chen B., Yang Q., Wu X. D., Li J. S., Xia X. H., Mi T., Hayatf T., Alsaedi A.Abstract:With the expansion of urbanization in China, the integrated biogas-utilization system has gained its popularity for both renewable energy production and multi-level utilization of organic waste. To appraise the ecological performance of the integrated biogas system, systematic accounting is undertaken for an integrated "pig-biogas-fish" system in Hubei province, China. Based on Odum's concept of embodied solar energy as a unified measure for environmental resources, human labors and purchased goods, a set of emergetic indicators are employed to quantify the system sustainability. The results reveal that in a 20-year designed lifetime scenario, 94.69% of the total emergy inputs for the "pig-biogas-fish" system are attributed to purchased social resources. Three kinds of products, namely pig, biogas, fish are taken into consideration, and Transformity of the "pig-biogas-fish" system is calculated as 1.26E + 05 seJ/J. Compared with the Chinese conventional agriculture system, the integrated biogas system shows a higher sustainability. Given that most biogas systems have a lifespan less than 20 years, for the "pig-biogas-fish" system, six other scenarios with different lifespans are studied to investigate the impact of the lifespan on sustainability. The findings suggest that the "pig-biogas-fish" system should be well operated for at least 8 years to prove its advantage in ecological economy over the conventional agriculture system. This has essential policy implications that local government should strengthen subsequent management on biogas production to extend the practical service life of the biogas system. (C) 2014 Elsevier Ltd. All rights reserved.http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000343853000022&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701Biodiversity ConservationEnvironmental SciencesSCI(E)EISSCI11ARTICLEqyang@mail.hust.edu.cn; aalsaedi@hotmail.com,SI189-1974
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Environmental sustainability of wind power: An emergy analysis of a Chinese wind farm
renewable sustainable energy reviews, 2013Co-Authors: Yang Q., Chen G. Q., Liao S., Zhao Y. H., Peng H. W., Chen H. P.Abstract:After a decade of astonishing growth of wind power capacity worldwide, sustainable utilization of wind energy resources has become an issue of utmost importance. For a comprehensive assessment of the environmental sustainability of a wind power, basic emergy flow diagram and emergy indices are presented in this paper to aggregate various renewable/nonrenewable local resources and purchased economic inputs associated with a wind power system, with concrete illustration by a case study of a modern wind farm in Guangxi, China. It is revealed that the solar Transformity of wind electricity is the lowest among typical electricity generation technologies. Emergy-based indices are then calculated to provide integrated information of the investigated wind farm from an ecological point of view. Comparison between the results with existing data for other renewable energy systems reflects the substantial advantages of wind power technology over solar thermal power and photovoltaic technologies in terms of sustainability and ecological cost. Nevertheless, biomass-derived fuels, especially biogas by anaerobic digestion, show a better ecological performance and environmental sustainability than wind and solar technologies. In addition, potential for improvements of Chinese wind farm are identified by optimization effort in human labor, land use and waste treatment. Crown Copyright (C) 2013 Published by Elsevier Ltd. All rights reserved.http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000325830900018&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701Energy & FuelsSCI(E)EISSCI19REVIEW229-2392
X F Wu - One of the best experts on this subject based on the ideXlab platform.
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Ecological accounting for an integrated "pig-biogas-fish" system based on emergetic indicators
Ecological Indicators, 2014Co-Authors: X F Wu, X. H. Xia, T. Mi, X D Wu, J.s. Li, G Q ChenAbstract:With the expansion of urbanization in China, the integrated biogas-utilization system has gained its popularity for both renewable energy production and multi-level utilization of organic waste. To appraise the ecological performance of the integrated biogas system, systematic accounting is undertaken for an integrated "pig-biogas-fish" system in Hubei province, China. Based on Odum's concept of embodied solar energy as a unified measure for environmental resources, human labors and purchased goods, a set of emergetic indicators are employed to quantify the system sustainability. The results reveal that in a 20-year designed lifetime scenario, 94.69% of the total emergy inputs for the "pig-biogas-fish" system are attributed to purchased social resources. Three kinds of products, namely pig, biogas, fish are taken into consideration, and Transformity of the "pig-biogas-fish" system is calculated as 1.26E + 05 seJ/J. Compared with the Chinese conventional agriculture system, the integrated biogas system shows a higher sustainability. Given that most biogas systems have a lifespan less than 20 years, for the "pig-biogas-fish" system, six other scenarios with different lifespans are studied to investigate the impact of the lifespan on sustainability. The findings suggest that the "pig-biogas-fish" system should be well operated for at least 8 years to prove its advantage in ecological economy over the conventional agriculture system. This has essential policy implications that local government should strengthen subsequent management on biogas production to extend the practical service life of the biogas system.
