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 47, Problem 9RQ
The approach temperature for the evaporator is
A. the difference between the suction and head pressures converted to temperature.
B. the difference between the refrigerant boiling temperature and the suction-line temperature.
C. the difference between the refrigerant boiling temperature and the inlet water temperature.
D. the difference between the refrigerant boiling temperature and the leaving-water temperature.
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The approach temperature for the evaporator isA. the difference between the suction and head pressuresconverted to temperature.B. the difference between the refrigerant boiling temperatureand the suction-line temperature.C. the difference between the refrigerant boiling temperatureand the inlet water temperature.D. the difference between the refrigerant boiling temperatureand the leaving-water temperature.
Does lowering suction temperature decrease the power input to a refrigerant compressor
1. What other substance circulates in the
refrigeration system with the refrigerant?
2. What would happen if there were more refrigerant
in the system than the condenser and receiver
could hold?
Chapter 47 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 47 - When a chiller is used, the secondary refrigerant...Ch. 47 - What are the two basic categories of chillers?Ch. 47 - Three types of compressors are used for chillers:...Ch. 47 - Blocked suction cylinder unloading is accomplished...Ch. 47 - True or False: The capacity control for a screw...Ch. 47 - Which of the following methods are used to...Ch. 47 - Describe a direct-expansion versus a flooded...Ch. 47 - What is the purpose of multiple passes in a...Ch. 47 - The approach temperature for the evaporator is A....Ch. 47 - What type of water-cooled condenser is used in...
Ch. 47 - The compressor used in low-pressure chillers is...Ch. 47 - List the types of metering devices used with...Ch. 47 - The subcooling temperature in a condenser can be...Ch. 47 - What causes a surge in a centrifugal chiller?Ch. 47 - Why is it important to keep an operating log on a...Ch. 47 - Which of the following metering devices is used in...Ch. 47 - The purge unit in a low-pressure chiller removes...Ch. 47 - In an absorption chiller, _______is used to create...Ch. 47 - The types of energy used to power a typical...Ch. 47 - True or False: Some absorption machines are...Ch. 47 - What is the common refrigerant used in absorption...Ch. 47 - How is capacity control accomplished with a...Ch. 47 - True or False: Single-phase induction,...Ch. 47 - Describe how a wye-delta is started and runs.Ch. 47 - Why is it important to have phase protection for...
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- The thermocouple couldn't be directly used for temperature measurement, unless a reference point is defined. This reference point is: Select one: O a. The boiling temperature. b. All of the above. c. The ambient temperature. d. The mixture of ice-water temperature.arrow_forwardThe typical temperature difference between the enteringair and the boiling refrigerant on a standard airconditioningevaporator is ______°F.arrow_forwardChoose correct answer: The purpose of a capillary tube in a refrigeration system is to ___________ A. Reduce the pressure and not temperature B. Reduce the temperature and pressure C. Increase the temperature and pressure D. Reduce the temperature and not pressurearrow_forward
- When a refrigeration system's suction line is noticeably cold instead of just being cool , it probably contains refrigerant . A. high -pressure liquid B. high -pressure vapor C. low-pressure liquid D. low -pressure vaporarrow_forwardGeneral types of Expansion device and Condenser used in a refrigeration system ?arrow_forward1. A temperature drop in the coolant entering the primary loop can be dangerous because,(a) Reactivity can increase as a result.(b) Pressure in the primary loop will decrease and water can flash to steam.(c) All of the above.(d) None of the abovearrow_forward
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