ps2_final

ps2_final - 16.050 Thermal Energy Time spent on problems:...

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16.050 Thermal Energy Problem Set #2 – Fall 2002 Time spent on problems: Problem 1: Problem 2: Problem 3: Problem 4: Problem 5: Problem 6:
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16.050 Thermal Energy Problem Set #2 – Fall 2002 Do all problems. Please use a separate sheet of paper for each problem. 1. Two different fuels can be used in a heat engine, operating between the fuel-burning temperature and a low temperature of 350 K. Fuel A burns at 2500 K delivering 52,000 kJ/kg and costs $1.75 per kilogram. Fuel B burns at 1700 K, delivering 40,000 kJ/kg and costs $1.50 per kilogram. Which fuel would you buy and why? 2. Two heat reservoirs (500 K and 300 K) operate a Carnot engine between them. ( a ) If the engine receives 1000 J from the 500 K reservoir, what heat is rejected to the 300 K reservoir? ( b ) If the engine were operated in reverse as a refrigerator and received 1000 J from the 300 K reservoir, what heat is delivered to the 500 K reservoir? ( c ) What is the mechanical work required to operate the refrigerator in (b)?
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This note was uploaded on 01/28/2012 for the course AERO 16.050 taught by Professor Zoltanspakovszky during the Fall '02 term at MIT.

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ps2_final - 16.050 Thermal Energy Time spent on problems:...

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