midterm_1_solutions

midterm_1_solutions - UNIVERSITY OF CALIFORNIA, DAVIS...

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UNIVERSITY OF CALIFORNIA, DAVIS MECHANICAL & AERONAUTICAL ENGINEERING ENG-105: THERMODYNAMICS MIDTERM #1 Professor Aldredge Spring Quarter, 2007 YOU HAVE 1 HOUR AND 40 MINUTES TO COMPLETE THIS EXAMINATION. PLEASE SHOW ALL OF YOUR WORK ON THE PAGES PROVIDED, IF POSSIBLE. NOTE THAT THE PROBLEMS ARE NOT EQUALLY WEIGHTED. YOU ARE ALLOWED TO REFER TO YOUR OWN SHEET OF HANDWRITTEN NOTES DURING THE EXAM. YOU ARE ALSO ALLOWED TO REFER TO EITHER YOUR PROPERTY-TABLES BOOKLET OR TO THE CONVERSION FACTORS IN THE INSIDE FRONT COVER OF YOUR TEXTBOOK AND THE APPENDICES AT THE BACK OF YOUR TEXTBOOK. YOU MAY NOT REFER TO ANY OTHER PART OF YOUR TEXTBOOK OR TO ANY OTHER NOTES DURING THE EXAM. I HAVE READ AND UNDERSTAND THESE EXAMINATION RULES. Printed Name: _________________________________ Signature: _________________________________ Student ID: _________________________________
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1. The coefficient of performance (efficiency) of a refrigeration cycle is 1.5. What would be the coefficient of performance of a heat-pump cycle operating under identical thermodynamic conditions? You must show your analysis and justify your answer to receive credit. (10 points)
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midterm_1_solutions - UNIVERSITY OF CALIFORNIA, DAVIS...

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