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Basically, you need to calculate the amount of energy contained in the fuel you use to produce a given amount of electrical energy. To calculate the amount of energy in the fuel you need to lookup the number of thermal energy units per unit volume then you can convert those thermal energy units into Joules (1 gallon [U.S.] of diesel oil = 146 520 000 joules - www.onlineconversion.com) The on the electrical side, just multiply the voltage by the current by the number of seconds of run time (unvarying load) to get the electrical power output in Joules. Then the efficiency is just the the output power divided by the input power (x100 for %).

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16y ago
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12y ago

Efficiency for any machine is the ratio of the output power to the input power, expressed as a per unit or percentage value.

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11y ago

some approach 33%

Carnot efficiency maximum

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11y ago

70%

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Q: What is the efficiency of hydraulic generators?
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