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 41, Problem 9RQ
If a condensing pressure is 260 psig for R-22, thecondensing temperature will be
A. 110°F.
B. 120°F.
C. 130°F.
D. 140°F.
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for R600a1) at 40oC what is the pressure of condensation?2) What is the absolute pressure and gauge pressure of -25’C evaporating refrigerant?
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1 atm steam (sat.) preheats CO2. If 2.26 MJ heat is released from 1kg of condensing steam, How much saturated steam is needed to condense to that 21 kg/s CO2is preheated from 303.15 K to 353.15 K?
Cp CO2 = 4.5R, where R = 8.314 J/mol K.
a. 0.40 kg/s
b. 0.36 kg/s
c. 0.30 kg/s
d. 0.18 kg/s
Chapter 41 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 41 - Before installing a gauge on the high-pressure...Ch. 41 - Capacitors should be shorted with a(n)...Ch. 41 - The high- and low-side pressures on an operating...Ch. 41 - Why do most air-conditioning systems not need a...Ch. 41 - A typical standard-efficiency evaporator under...Ch. 41 - The typical temperature difference between the...Ch. 41 - When the ambient outside air temperature isand the...Ch. 41 - When the outside ambient air temperature is 90F,...Ch. 41 - If a condensing pressure is 260 psig for R-22,...Ch. 41 - How is high efficiency accomplished in an...
Ch. 41 - True or False: When troubleshooting a small...Ch. 41 - The suction gas may have a high superheat if the...Ch. 41 - If the suction pressure is low and the suction...Ch. 41 - What electrical test instrument is used to measure...Ch. 41 - What electrical test instrument is used to measure...Ch. 41 - Most condensers will subcool the refrigerant to...Ch. 41 - What are two types of fixed-bore metering devices?Ch. 41 - It no crankcase heat is at the compressor, what...Ch. 41 - What is the purpose of the internal overload...Ch. 41 - If a condenser circuit breaker is tripped, you...
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