Exergy consumption of the earth

doi:10.1016/j.ecolmodel.2004.10.015

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	Exergy consumption of the earth
	Chen, GQ
刊名	ecological modelling
	2005
关键词	exergy entropy energy earth ecological modelling resource accounting environmental assessment sustainable development RADIATIVE-CONVECTIVE EQUILIBRIUM ENERGY-CONVERSION SOLAR-RADIATION ENTROPY BUDGET CLIMATE ATMOSPHERE THERMODYNAMICS SYSTEMS SOCIETY
DOI	10.1016/j.ecolmodel.2004.10.015
英文摘要	Presented in this paper are a systematic study on the global exergy consumption in the earth and a budget of the exergy consumption with respect to main terrestrial processes. Based on Szargut's definition of exergy for thermal radiation, a global exergy balance of the thermodynamic system of the earth, driven by cosmic exergy flow originated from the temperature difference between the sun and the cosmic background, is carried out to give the global cosmic exergy consumption as the multiplication of the cosmic background microwave (CBM) radiation temperature and the global entropy generation due to irreversibility in the earth system. Concrete formulae are derived for cosmic exergy, with emphasis on generalization of a simple blackbody relationship between entropy and energy flux densities to the cases of gray body radiation with moderate or large emissivity associated with the earth system. Global entropy generation is evaluated with a result compared very well with a widely accepted datum based on satellite observations in earth science. A budget of the global entropy generation is made with respect to the terrestrial radiation processes associated with the atmosphere and the earth's surface and to the molecular transport phenomena in the material earth. A mechanism of multiplication governing transformation between cosmic exergy and terrestrial exergy is developed. An overall exergy budget of the earth system, based on the entropy budget by means of the Gouy-Stodola law, are presented with essential implication to the problem of global sustainability. (c) 2004 Elsevier B.V. All rights reserved.; Ecology; SCI(E); EI; 76; ARTICLE; 2-4; 363-380; 184
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/253423]
专题	工学院
推荐引用方式 GB/T 7714	Chen, GQ. Exergy consumption of the earth[J]. ecological modelling,2005.
APA	Chen, GQ.(2005).Exergy consumption of the earth.ecological modelling.
MLA	Chen, GQ."Exergy consumption of the earth".ecological modelling (2005).