« previous next »

Author Question: A pressure-time-temperature defrost system goes into defrost with very little frost on the bottom of ... (Read 182 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?

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?

There are approximately 3 million unintended pregnancies in the United States each year.

Did you know?

ACTH levels are normally highest in the early morning (between 6 and 8 A.M.) and lowest in the evening (between 6 and 11 P.M.). Therefore, a doctor who suspects abnormal levels looks for low ACTH in the morning and high ACTH in the evening.

Did you know?

The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.

Did you know?

Atropine, along with scopolamine and hyoscyamine, is found in the Datura stramonium plant, which gives hallucinogenic effects and is also known as locoweed.

Acetylcholine receptors and the autonomic nervous system Acetylcholine receptors and the autonomic nervous system
Endocrine System - Fish Endocrine System - Fish
Outline of the System That Controls Drinking Outline of the System That Controls Drinking
Overview of the cardiovascular system. Overview of the cardiovascular system.
Connections of a nitric acid plant, intermediate pressure type Connections of a nitric acid plant, intermediate pressure type
Average Surface Air Pressure – July Average Surface Air Pressure – July
Video: Properties of macromolecules (Explained with No Audio)

For a complete list of videos, visit our video library