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Wiktionary英語版

出典:Wiktionary

ウィキペディア英語版

出典:Wikipedia

Emergy

出典:『Wikipedia』 (2011/06/07 19:49 UTC 版)

英語による解説

ウィキペディア英語版からの引用
引用

Emergy is the available energy (exergy) of one kind that is used up in transformations directly and indirectly to make a product or service. Emergy accounts for, and in effect, measures quality differences between forms of energy. Emergy is an expression of all the energy used in the work processes that generate a product or service in units of one type of energy. The unit of emergy is the emjoule, a unit referring to the available energy of one kind consumed in transformations. Emergy accounts for different forms of energy and resources (e.g. sunlight, water, fossil fuels, minerals, etc.). Each form is generated by transformation processes in nature and each has different ability to support work in natural and human dominated systems. The recognition of these differences in quality is a key concept of the emergy methodology.

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