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Unformatted text preview: Page 1 of 1 Problem 2: A certain fuel burns at a temperature of 2100 K producing 45 kJ/kg of heat. It is proposed to operate a Carnot heat engine between the burning fuel and the atmosphere at T=300 K (80 F). Determine the work output of this heat engine. The work output from the heat engine is used to drive a Carnot refrigerator. The refrigerator is used to cool a room at a constant temperature of 290 K (62 F), and rejects heat to the same atmosphere. Find: a) The coefficient of performance (COP). b) The amount of heat removed from the room in kJ/kg. Now, suppose that the atmosphere temperature has increased to 310 K (98 F) on a hot summer day. Assuming that the refrigerator removes the same amount of heat from the room, determine the work in kJ/kg required to drive the refrigerator. Page 2 of 2...
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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.
- Fall '02