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Consider the following functions:

1) Minimizing friction

2) Sealing the gas between suction and discharge ports

3) As a coolant to transfer heat from the crankcase to the compressor shell

4) To dampen the noise generated by moving parts

Which of the above function do lubricants in refrigeration systems perform?
1. 1, 2, 3, and 4
2. 1 and 2 only
3. 2 and 3 only
4. 3 and 4 only

1 Answer

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Best answer
Correct Answer - Option 1 : 1, 2, 3, and 4

Explanation:

Following are the function of lubrication in the refrigeration system:-

  1.  Minimizing friction
  2.  Sealing the gas between suction and discharge ports
  3. As a coolant to transfer heat from the crankcase to the compressor shell
  4. To dampen the noise generated by moving parts
  5. For hermetic units, it must also have high dielectric strength.
  6. Adequate fluidity at a low temperature so that it may easily return to the compressor from the evaporator.

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