Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN: 9781305578296
Author: John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher: Cengage Learning
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Textbook Question
Chapter 45, Problem 2RQ
The operating condition for the single compressor in a household refrigerator is the lowest box temperature, which is typically
A. 0°F
B. -20°F
C. 20°F
D. 40°F
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Chapter 45 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 45 - The typical temperature inside the fresh-food...Ch. 45 - The operating condition for the single compressor...Ch. 45 - When the air temperature in a domestic freezer is...Ch. 45 - Typical head pressures should correspond to a...Ch. 45 - Using the temperature/pressure chart in Unit 3,...Ch. 45 - Using the pressure/temperature chart in Unit 3,...Ch. 45 - If a forced-draft evaporator fan motor is wired in...Ch. 45 - Frost accumulates on the evaporators of...Ch. 45 - The defrost cycle in a domestic refrigerator may...Ch. 45 - Prob. 10RQ
Ch. 45 - What are the two types of evaporators found in...Ch. 45 - Refrigerators currently being manufactured in the...Ch. 45 - Condensers in these refrigerators are...Ch. 45 - Home freezers are air-cooled and may have...Ch. 45 - Induced-draft condensers are typically used with...Ch. 45 - The capillary tube metering device is usually...Ch. 45 - Prob. 17RQCh. 45 - If the compressor has liquid refrigerant returning...Ch. 45 - Some freezers may have ______heaters to prevent...Ch. 45 - Welded ______sealed compressors are normally used...Ch. 45 - Special heaters called ______heaters are often...Ch. 45 - Prob. 22RQCh. 45 - Prob. 23RQCh. 45 - The adjustment device used for low atmospheric...Ch. 45 - Prob. 25RQ
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- Where is the only permanent suction line on a heat pump?arrow_forwardThe typical temperature relationship between a standard-efficiency air-cooled condenser and the ambient temperature is A. 50F. B. 40F C. 30F. D. 20F.arrow_forwardAn important factor (or factors) involving water quality with regard to open-loop heat pump systems is(are) A. water temperature. B. water cleanliness. C. water volume in gpm. D. all of the above.arrow_forward
- When the outside ambient air temperature is 90F, the temperature of the condensing refrigerant in a standard- efficiency unit should be approximately A. 120F. B. 130F. C. 140F. D. 150F.arrow_forwardA typical standard-efficiency evaporator under standard conditions will operate at a temperature of A. 30F. B. 40F. C. 50F. D. 60F.arrow_forwardA medium-temperature refrigeration box operates within what temperature range? A. 28F to 40F B. 40F to 60F C. 0F to -20F D. 0F to 50Farrow_forward
- The condensing and evaporating pressures in a 10 TR refrigeration system are 11.82 bar and 1.64 bar, respectively. The refrigerant enters the compressor at dry and saturated state and leaves the condenser subcooled by 10°C. The actual COP is 70% of its theoretical value. Determine: a. The theoretical COP b. The actual COParrow_forwardChoose correct answer: In the heat pump system, the heat is usually rejected by ______________ A. expansion device B. compressor C. condenser D. evaporatorarrow_forward2.Determine the coefficient of performance for a Carnot Cycle Refrigerating Machine and for a Carnot – Cycle Heat Pump operating between a condenser temperature of 86 F and an evaporator temperature of a) 50 F b) 30 F c) 10 F d) -10 Farrow_forward
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