This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: How can a PH diagram be used to select the system compressor? What will be an ideal ... (Read 97 times)

londonang

  • Hero Member
  • *****
  • Posts: 540
on: Jul 26, 2018
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
Reply #1 on: Jul 26, 2018
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.


londonang

  • Hero Member
  • *****
  • Posts: 540
Reply #2 on: Jul 26, 2018
TY


macagn

  • Sr. Member
  • ****
  • Posts: 345
Reply #3 on: Jul 26, 2018
You're welcome


« previous next »
 

Did you know?

It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.

Did you know?

Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.

Did you know?

Glaucoma is a leading cause of blindness. As of yet, there is no cure. Everyone is at risk, and there may be no warning signs. It is six to eight times more common in African Americans than in whites. The best and most effective way to detect glaucoma is to receive a dilated eye examination.

Did you know?

Sildenafil (Viagra®) has two actions that may be of consequence in patients with heart disease. It can lower the blood pressure, and it can interact with nitrates. It should never be used in patients who are taking nitrates.

Did you know?

The U.S. Pharmacopeia Medication Errors Reporting Program states that approximately 50% of all medication errors involve insulin.

Major glands of the human endocrine system Major glands of the human endocrine system
Block Diagram of a High Concentrate Nitric Acid System for Dual-Stage Pressure Production of Nitric Block Diagram of a High Concentrate Nitric Acid System for Dual-Stage Pressure Production of Nitric
Diagram of a hair follicle. Diagram of a hair follicle.
The digestive system. The digestive system.
The dorsal-column medial-lemniscus system. The pathways from only one side of the body are shown. The dorsal-column medial-lemniscus system. The pathways from only one side of the body are shown.
Pathway of Deterioration Following Central Nervous System Insult Pathway of Deterioration Following Central Nervous System Insult
Video: Embryonic development - Weeks 5 to 8

For a complete list of videos, visit our video library