Chemistry, 19.07.2021 21:20, cowsareawesomeness

If we burn 1 gr of ethyl alcohol (C2H5OH) this will translate into a release of about 50 W of thermal energy of the flame that raise the temperature of the hot and cold reservoirs of a Sterling engine at 55 °C and 95 °C respectively. If at steady state the engine turns at about 240 rpm, its gears are shaped as rings of radius ~2 cm and weigh 50 gr, how efficient (in %) is the transfer of energy via flame?

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If we burn 1 gr of ethyl alcohol (C2H5OH) this will translate into a release of about 50 W of therma...