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

Author Question: What type of pressure control can be used for rooftop air-cooled condensers? What will be an ... (Read 24 times)

jlmhmf

  • Hero Member
  • *****
  • Posts: 552
on: Jul 26, 2018
What type of pressure control can be used for rooftop air-cooled condensers?
 
  What will be an ideal response?

Question 2

How does a pulse width modulated expansion valve operate?
 
  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

tjayeee

  • Sr. Member
  • ****
  • Posts: 329
Reply #1 on: Jul 26, 2018
Answer to Question 1

Cycling fans, condenser bypass, or split condensers.

Answer to Question 2

Within a period of six seconds a voltage signal from the controller will be transmitted to and removed from the valve coil. If there is a demand for refrigerant, the valve will remain open for almost all of the six seconds. If there is little demand then the valve will only stay open for a fraction of the six second period. This type of valve includes a tight shut-off function that eliminates the need for an additional solenoid valve.


jlmhmf

  • Member
  • Posts: 552
Reply 2 on: Jul 26, 2018
Gracias!

Zebsrer

  • Member
  • Posts: 284
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.

Did you know?

Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.

Did you know?

Nearly all drugs pass into human breast milk. How often a drug is taken influences the amount of drug that will pass into the milk. Medications taken 30 to 60 minutes before breastfeeding are likely to be at peak blood levels when the baby is nursing.

Did you know?

To prove that stomach ulcers were caused by bacteria and not by stress, a researcher consumed an entire laboratory beaker full of bacterial culture. After this, he did indeed develop stomach ulcers, and won the Nobel Prize for his discovery.

Did you know?

Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.

Exercise and Blood Pressure Exercise and Blood Pressure
Sympathetic control of adrenal gland. Sympathetic control of adrenal gland.
Control of urination. Control of urination.
A point-type ignition system showing the distributor cam which opens the points A point-type ignition system showing the distributor cam which opens the points
A severe case of delayed contact dermatitis (Type IV hypersensitivity) from wearing latex gloves. A severe case of delayed contact dermatitis (Type IV hypersensitivity) from wearing latex gloves.
Good hand and body mechanics when applying thumb pressure to the back. Good hand and body mechanics when applying thumb pressure to the back.
Video: Inflammation Animation

For a complete list of videos, visit our video library