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Chapters 17 & 18 Begin Date: 8/20/2018 12:00:00 AM Due Date: 11/27/2018 11:59:00 PM End Date: 12/7/2018 12:00:00 AM (13%) Problem 6: A heat engine provides a net power output of 6.5 kW and has an efficiency of 27 %. The engine rejects 4200 J of energy per cycle to a low temperature reservoir. 50% Part (a) Determine the amount of heat delivered to the engine from the high temperature reservoir per second. Your answer should be in units of Watts 24074.07 OH 24070 Correct! 50% Part (b) Determine the required number of cycles per minute executed Grade Summary Deductions 6% Potential N- 0.0258 94% sinO Submissions

Part a is correct, please help with part B. Determine the required number of cycles per minute executed.

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Part (a) The efficiency is, The amount of heat delivered is, $29 9 6.5x103 w (1 0.27 Calculate the amount of heat delivered per second as follows 6.5x103 w( 1 0.27 24070 Ws 24070 JPart (b) The amount of energy rejected per second is ejet 4200J Calculate the amount of energy absorbed per second as follows reject orbed 0 bsorbed _ eject absorbed_ 4200 J 1-0.27 5753.4J The required number of cycles per second is 24070J-4.1836 arbe5753.4J The required number of cycles per minute is, N- N(60) (4.1836 (60) 251

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