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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Chapter 3, Problem 27RQ
Define heat of compression, and explain how it is computed.
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A 12 x 14 in double-acting air compressor with 5.5% clearance operates at 150 rpm, drawing air at 14.5 psia and 85 ̊F and discharging is at 62 psia, the compression and expansion processes are polytropic with n=1.34. Determine:
a) The volume of free air handled per minute, if atmospheric conditions are 82 ̊F and 14.7 psia,
b) The heat rejected,
c) The indicated work of the compressor if the compression efficiency is 87%
d) The ideal work
Chapter 3 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 3 - Name three reasons why ice melts in an icebox:...Ch. 3 - What are the approximate temperature ranges tor...Ch. 3 - One ton of refrigeration is A. 1200 Btu. B. 12,000...Ch. 3 - Describe briefly the basic refrigeration cycle.Ch. 3 - What is the relationship between pressure and the...Ch. 3 - What is the function of the evaporator in a...Ch. 3 - What does the compressor do in the refrigeration...Ch. 3 - Define a superheated vapor.Ch. 3 - The evaporating pressure is 76 psig for R-22 and...Ch. 3 - If the evaporating pressure was 76 psig for R-22...
Ch. 3 - Define the term subcooled liquid.Ch. 3 - The condensing pressure is 260 psig and the...Ch. 3 - The condensing pressure is 260 psig and the...Ch. 3 - What is meant by a saturated liquid and vapor?Ch. 3 - What is meant by desuperheating a vapor?Ch. 3 - What happens to the refrigerant in the condenser?Ch. 3 - What happens to refrigerant heat in the condenser?Ch. 3 - The metering device A. cycles the compressor. B....Ch. 3 - What is adiabatic expansion?Ch. 3 - Describe flash gas, and tell how it affects...Ch. 3 - Quality means _________ when referring to a...Ch. 3 - Describe the difference between a reciprocating...Ch. 3 - List the cylinder color codes for R-12, R-22,...Ch. 3 - Define enthalpy.Ch. 3 - Define a pure compound refrigerant, and give two...Ch. 3 - Define net refrigeration effect as it applies to...Ch. 3 - Define heat of compression, and explain how it is...Ch. 3 - Define flash gas, and explain how it applies to...Ch. 3 - Define temperature glide as it pertains to a...Ch. 3 - Define a zeotropic refrigerant blend, and give an...Ch. 3 - Define a near-azeotropic refrigerant blend, and...
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