This topic contains a solution. Click here to go to the answer

Author Question: How can a PH diagram be used to select the system compressor? What will be an ideal ... (Read 68 times)

londonang

  • Hero Member
  • *****
  • Posts: 540
How can a PH diagram be used to select the system compressor?
 
  What will be an ideal response?

Question 2

What are the constant quality lines?
 
  What will be an ideal response?



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

macagn

  • Sr. Member
  • ****
  • Posts: 345
Answer to Question 1

Plot the system on the PH diagram
Determine the amount of heat picked up in the evaporator by subtracting the enthalpy of the saturated mix entering the evaporator from the enthalpy of the gas leaving the evaporator.

Divide this into the required system capacity to get lbs/min of refrigerant Calculate the required gas volume by multiplying the volume of the gas entering the compressor times the lbs/min
Determine the compressor operating pressures from the condenser and evaporator horizontal lines.
Match compressor volume at the determined operating pressures

Answer to Question 2

The constant quality lines start at the bottom and extend upward toward the critical point located in top center of the saturation curve. These lines represent the percentage of vapor in the saturated refrigerant.




macagn

  • Sr. Member
  • ****
  • Posts: 345

 

Did you know?

Though newer “smart” infusion pumps are increasingly becoming more sophisticated, they cannot prevent all programming and administration errors. Health care professionals that use smart infusion pumps must still practice the rights of medication administration and have other professionals double-check all high-risk infusions.

Did you know?

Cyanide works by making the human body unable to use oxygen.

Did you know?

Vaccines prevent between 2.5 and 4 million deaths every year.

Did you know?

Coca-Cola originally used coca leaves and caffeine from the African kola nut. It was advertised as a therapeutic agent and "pickerupper." Eventually, its formulation was changed, and the coca leaves were removed because of the effects of regulation on cocaine-related products.

Did you know?

The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.

For a complete list of videos, visit our video library