« previous next »

Author Question: A pressure-time-temperature defrost system goes into defrost with very little frost on the bottom of ... (Read 189 times)

RRMR

  • Hero Member
  • *****
  • Posts: 557
on: Jul 26, 2018
A pressure-time-temperature defrost system goes into defrost with very little frost on the bottom of the coil. Describe the major cause of and solution to this problem.
 
  What will be an ideal response?

Question 2

Where are the specific enthalpy lines and how are they marked?
 
  What will be an ideal response?


vickybb89

  • Sr. Member
  • ****
  • Posts: 347
Reply #1 on: Jul 26, 2018
Answer to Question 1

The major cause of this action is a dirty outdoor coil, which causes an increased air pressure drop across the outdoor coil. Cleaning the coil solves this problem.

Answer to Question 2

The specific enthalpy lines are vertical lines going from top to bottom; the scale is shown along the top and bottom of the PH diagram. The units are given in Btu per pound of refrigerant, Btu/lb.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

Did you know?

Drug abusers experience the following scenario: The pleasure given by their drug (or drugs) of choice is so strong that it is difficult to eradicate even after years of staying away from the substances involved. Certain triggers may cause a drug abuser to relapse. Research shows that long-term drug abuse results in significant changes in brain function that persist long after an individual stops using drugs. It is most important to realize that the same is true of not just illegal substances but alcohol and tobacco as well.

Did you know?

The average person is easily confused by the terms pharmaceutics and pharmacology, thinking they are one and the same. Whereas pharmaceutics is the science of preparing and dispensing drugs (otherwise known as the science of pharmacy), pharmacology is the study of medications.

Did you know?

The shortest mature adult human of whom there is independent evidence was Gul Mohammed in India. In 1990, he was measured in New Delhi and stood 22.5 inches tall.

Did you know?

The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.

Measuring Temperature Using a Tympanic Membrane (Aural) Thermometer Measuring Temperature Using a Tympanic Membrane (Aural) Thermometer
Major Degenerative Diseases of the Central Nervous System Major Degenerative Diseases of the Central Nervous System
The human gustatory system. The human gustatory system.
The annual pattern of rings changes with ocean temperature and coral health The annual pattern of rings changes with ocean temperature and coral health
system equation system equation
A chemical reaction is run in which 447 Joules of work is done by the system and A chemical reaction is run in which 447 Joules of work is done by the system and
Video: Nerve Impulse Transmission Animation

For a complete list of videos, visit our video library