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

Author Question: Why are systems with fixed restriction metering devices critical to charge? What will be an ideal ... (Read 201 times)

B

  • Hero Member
  • *****
  • Posts: 570
on: Jul 26, 2018
Why are systems with fixed restriction metering devices critical to charge?
 
  What will be an ideal response?

Question 2

What is the purpose of an oil return system for a chiller?
 
  What will be an ideal response?

Question 3

Why must refrigerants that fractionate, such as R-410a, be charged as a liquid?
 
  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

jamesnevil303

  • Sr. Member
  • ****
  • Posts: 337
Reply #1 on: Jul 26, 2018
Answer to Question 1

They cannot adjust to changing conditions and they have no liquid receiver to store extra refrigerant.

Answer to Question 2

The oil in many large commercial centrifugal and screw type chillers travels through the system and collects in the bottom of the cooler. Without some type of oil return system, the oil will not be able to be reintroduced into the lubrication circuit.

Answer to Question 3

Refrigerants that fractionate, such as R-410A, must be charged as liquid to prevent the separation of the refrigerant.


B

  • Member
  • Posts: 570
Reply 2 on: Jul 26, 2018
Great answer, keep it coming :)

juliaf

  • Member
  • Posts: 344
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.

Did you know?

Walt Disney helped combat malaria by making an animated film in 1943 called The Winged Scourge. This short film starred the seven dwarfs and taught children that mosquitos transmit malaria, which is a very bad disease. It advocated the killing of mosquitos to stop the disease.

Did you know?

The tallest man ever known was Robert Wadlow, an American, who reached the height of 8 feet 11 inches. He died at age 26 years from an infection caused by the immense weight of his body (491 pounds) and the stress on his leg bones and muscles.

Did you know?

Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.

Did you know?

Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.

Respiratory Assistive Devices, Peak Flow Meter Respiratory Assistive Devices, Peak Flow Meter
Protective devices: A, abdominal binder; B, arm sling. Protective devices: A, abdominal binder; B, arm sling.
Complex systems and subsystems: watershed Complex systems and subsystems: watershed
Autonomic Nervous Systems Autonomic Nervous Systems
Critical-Thinking Tip Critical-Thinking Tip
Lineage restriction of human developmental potency. Lineage restriction of human developmental potency.
Video: Knee Animation

For a complete list of videos, visit our video library