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Author Question: An engineer wishes to select a suction line that will have a maximum pressure drop which is ... (Read 93 times)

ts19998

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on: Jul 26, 2018
An engineer wishes to select a suction line that will have a maximum pressure drop which is equivalent to a 2F saturation temperature drop. What would be the pressure drop for a 134a system operating with a 0F saturation temperature?
 
  What will be an ideal response?

Question 2

Often around fluorescent lights in a drop ceiling there is a narrow slit. What is the purpose and advantages of application?
 
  What will be an ideal response?


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jlaineee

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

134a at 0F saturation is 6.5 psig. 134a at -2F saturation is 5.5 psig 6.5  5.5 = 1 psi drop for a 2F saturation temperature drop

Answer to Question 2

That opening is the return air. The advantage of having a return air around the fluorescents is that the heat generated by the light is pulled back up into the return and is not radiated as much into the occupied space.


ts19998

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Reply 2 on: Jul 26, 2018
YES! Correct, THANKS for helping me on my review

jackie

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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