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Author Question: What is the difference between the way a secondary refrigerant absorbs heat and the way a primary, ... (Read 8 times)

frankwu

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on: Jul 26, 2018
What is the difference between the way a secondary refrigerant absorbs heat and the way a primary, direct expansion refrigerant absorbs heat?
 
  What will be an ideal response?

Question 2

How is heat transferred in a heat pump ground loop?
 
  What will be an ideal response?


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nmyers

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Reply #1 on: Jul 26, 2018
Answer to Question 1

In a direct expansion system, the primary refrigerant evaporates and expands, absorbing both sensible and latent heat. In contrast, a secondary refrigerant does not evaporate and therefore only absorbs sensible heat, which makes the temperature difference and surface area requirements greater than those needed for a direct expansion system.

Answer to Question 2

The water acts like a secondary refrigerant, absorbing heat from the soil and transferring it to the refrigerant in the heat pump.


frankwu

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Reply 2 on: Jul 26, 2018
Great answer, keep it coming :)

Joy Chen

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Reply 3 on: Yesterday
Excellent

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