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 10, Problem 1RQ
How can liquid refrigerant be added to the refrigeration system when the system is out of refrigerant?
Expert Solution & Answer
To determine
When the system is out of refrigerant the procedure for adding liquid refrigerant in it.
Explanation of Solution
In the refrigeration system, charging a system refers to adding a refrigerant into the system. The amount and type of the charge added must be correct so that a refrigeration system can operate effectively and efficiently as it was designed to. Some refrigerant such as single-compound refrigerants may be added into the system either in the vapour or liquid states, while blended refrigerants must be charged only in the liquid state. A scale is used to determine the correct amount of refrigerant that is added to a system.
Liquid refrigerant charging of a system is normally passed in the liquid line. Liquid refrigerant can be passed into the king valve on the liquid line or receiver when a system is out of refrigerant.It moves through the evaporator and condenser. If the system is in a vacuum or has been evacuated, liquid refrigerant is allowed to enter the system until the flow has nearly stopped. After entering into the system, the liquid refrigerant will move towards the evaporator and condenser coils. While charging the system with liquid refrigerant, precautions must be taken to enter the refrigerant into the suction line of a compressor as it causes damage to the system.
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6. If the 50-kg load A is hoisted by motor M so that the load has a constant velocity of 1.5
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1.5 m/s
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Question 1
The engine of a 3500-N car is generating a constant power of 50 hp (horsepower)
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10
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static friction is μ = 0.6, the coefficient of kinetic…
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where a and b are empirical constants.
Chapter 10 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 10 - How can liquid refrigerant be added to the...Ch. 10 - How is the refrigerant cylinder pressure kept...Ch. 10 - Why does the refrigerant pressure decrease in a...Ch. 10 - What type of equipment normally has the...Ch. 10 - Why are digital scales preferred over other types...Ch. 10 - How does a graduated cylinder account for the...Ch. 10 - What methods besides weighing and measuring are...Ch. 10 - Two or more refrigerants combined together to...Ch. 10 - Define temperature glide, and give examples of...Ch. 10 - A portion of a refrigerant blend that is...
Ch. 10 - What is the main difference between a zeotropic...Ch. 10 - What is meant by "restricting" liquid refrigerant...Ch. 10 - What causes fractionation in certain refrigerant...Ch. 10 - When should a service technician use the...Ch. 10 - A service technician is charging an...Ch. 10 - A technician takes the following readings on an...
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