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428: 2018/03/31(土)13:52 ID:CkQjJfZM(5/10) AAS
n physics, energy economics, and ecological energetics, energy ret
urned on energy invested (EROEI or ERoEI); or energy return on in
vestment (EROI), is the ratio of the amount of usable energy (the
exergy) delivered from a particular energy resource to the amount
of exergy used to obtain that energy resource. It is a distinct meas
ure from energy efficiency as it does not measure the primary ener
gy inputs to the system, only usable energy. Arithmetically the EROEI can b
e written as:.
EROI - Wikipedia
外部ﾘﾝｸ:en.wikipedia.org
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