THERMODYNAMICS LLF W/ CONNECT ACCESS
9th Edition
ISBN: 9781264446889
Author: CENGEL
Publisher: MCG
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Chapter 6.11, Problem 157RP
To determine
Show that the coefficient of performance of heat pump is equal to coefficient of performance of refrigerator plus one at same temperature and heat transfer terms.
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The objective of a refrigerator is to remove QL from the cooled space.
The COP of an ideal refrigerator is N. If the machine is operated as a heat pump between the
same temperature limits, its COP will be
1. N-1
2. N
3. N+1
4. 2N
Detemine the COP of a heat pump when it is working between 1000 K and 100 C.
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- Refrigerators currently being manufactured in the United States are using______as their refrigerant.arrow_forwardIf 14 gpm of water is flowing through an open-loop heat pump with a temperature difference of 7F, how much heat in Btu/h is being absorbed or rejected in the heat pump? Show all work and units.arrow_forwardQuick solution,no gpt.arrow_forward
- Reference Book: Introduction to Chemical Engineering Thermodynamics by Smith, Van Ness, etc. 7th or 8th Ed.arrow_forwardThe refrigerator removes heat at the rate of 5000 kJ/hr at 5 °C. It rejects the heat at 35 °C. COP of the machine is 3. The power needed to operate the refrigerator is 0.1499 1.389 8.33 0.463arrow_forwardThe temperature inside a Carnot refrigerator is8.34°C. What is the high temperature, Th, in Celsius needed to give this refrigerator a coefficient of performance of 9.43?arrow_forward
- 1. A Carnot refrigerator operates between two reservoirs, one at 250K and the other at 300K. It is claimed that the refrigerator has a COPr of 6. Determine: a. If the energy removed from the low temperature reservoir is 160 kJ, then what is the energy delivered to the high temperature reservoir and how much work must be put into the system. b. Is the refrigerator even possible?arrow_forwardA refrigerator and heat pump operate between the same temperature limits. If the COP of the heat pump is 5, then the COP of the refrigerator would be Select one: O a. 7 O b. 5 О с. 4 O d. 6arrow_forwardWhat is the highest COP that a refrigerator operating between temperature levels TL and TH can have?arrow_forward
- A heat pump operates with a Coefficient of Performance equal to 8. What is the COP if this cycle were to operate as a refrigerator?arrow_forwardExplain the principle of operation of a refrigerator (include a simple diagram).arrow_forwardWhat is true about heat pump and refrigerator? a-COP of refrigerator is greater than COP of heat pump b-COP of refrigerator and heat pump cannot be more than unity c-both refrigerator and heat pump works on same principle but different objectives d-heat pump receives heat from high temperature sourcearrow_forward
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