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 52 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
Excellent

peter

  • Member
  • Posts: 330
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?

In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.

Did you know?

Despite claims by manufacturers, the supplement known as Ginkgo biloba was shown in a study of more than 3,000 participants to be ineffective in reducing development of dementia and Alzheimer’s disease in older people.

Did you know?

Anesthesia awareness is a potentially disturbing adverse effect wherein patients who have been paralyzed with muscle relaxants may awaken. They may be aware of their surroundings but unable to communicate or move. Neurologic monitoring equipment that helps to more closely check the patient's anesthesia stages is now available to avoid the occurrence of anesthesia awareness.

Did you know?

Certain rare plants containing cyanide include apricot pits and a type of potato called cassava. Fortunately, only chronic or massive ingestion of any of these plants can lead to serious poisoning.

Control of Circadian Rhythms in Sleep and Waking by the SCN During the day cycle, the DMH inhibits t Control of Circadian Rhythms in Sleep and Waking by the SCN During the day cycle, the DMH inhibits t
Hormonal control of adrenal gland. CRH = corticotropin releasing hormone; ACTH = adrenocorticotropic ... Hormonal control of adrenal gland. CRH = corticotropin releasing hormone; ACTH = adrenocorticotropic ...
Apply effleurage and direct pressure on attachments of pectoralis minor. Lift one arm off the table ... Apply effleurage and direct pressure on attachments of pectoralis minor. Lift one arm off the table ...
Control you knife with one hand and hold the item being cut with the other (1 of 3) Control you knife with one hand and hold the item being cut with the other (1 of 3)
Primary Type of Floor Framing Primary Type of Floor Framing
Mechanisms of negative control of transcription Mechanisms of negative control of transcription
Video: Cardiac Cycle (Part 2 of 4)

For a complete list of videos, visit our video library