Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN: 9781305578296
Author: John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Textbook Question
Chapter 45, Problem 3RQ
When the air temperature in a domestic freezer is 0°F, the plate-type evaporator temperature may be as low as
A. -30°F.
B. -12°F.
C. -6°F.
D. 0°F.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
Which process would best represent the opposite ofexhausting air from a system?A. CoolingB. VentilatingC. HeatingD. Filtering
When a refrigeration system's suction line is noticeably cold instead of just being cool , it probably contains refrigerant .
A. high -pressure liquid
B. high -pressure vapor
C. low-pressure liquid
D. low -pressure vapor
Heat expulsion occurs in what section of a heat pump system when operating in the heat mode?
A. accumulator
B. evaporator
C. receiver
D. condenser
Chapter 45 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 45 - The typical temperature inside the fresh-food...Ch. 45 - The operating condition for the single compressor...Ch. 45 - When the air temperature in a domestic freezer is...Ch. 45 - Typical head pressures should correspond to a...Ch. 45 - Using the temperature/pressure chart in Unit 3,...Ch. 45 - Using the pressure/temperature chart in Unit 3,...Ch. 45 - If a forced-draft evaporator fan motor is wired in...Ch. 45 - Frost accumulates on the evaporators of...Ch. 45 - The defrost cycle in a domestic refrigerator may...Ch. 45 - Prob. 10RQ
Ch. 45 - What are the two types of evaporators found in...Ch. 45 - Refrigerators currently being manufactured in the...Ch. 45 - Condensers in these refrigerators are...Ch. 45 - Home freezers are air-cooled and may have...Ch. 45 - Induced-draft condensers are typically used with...Ch. 45 - The capillary tube metering device is usually...Ch. 45 - Prob. 17RQCh. 45 - If the compressor has liquid refrigerant returning...Ch. 45 - Some freezers may have ______heaters to prevent...Ch. 45 - Welded ______sealed compressors are normally used...Ch. 45 - Special heaters called ______heaters are often...Ch. 45 - Prob. 22RQCh. 45 - Prob. 23RQCh. 45 - The adjustment device used for low atmospheric...Ch. 45 - Prob. 25RQ
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- What is the purpose of the cooling tower in a water-cooled system?arrow_forwardWhat is meant by the term approach when dealing withan evaporator chilling water?arrow_forward1. An air-source heat pump is a heat-pump system that uses air: a. as the system refrigerant. b. as the heat source when operating in the cooling mode. c. as the heat sink when operating in the heating mode. d. as the heat source when operating in the heating mode. 2. According to the Department of Energy, duct leakage can result in a energy loss? a. 10% b. 20% c. 30% d. 40% 3. As the outside ambient temperature drops, the efficiency of a heat-pump system operating in the mode will: a. heating, drop b. heating, rise c. cooling, rise d. Both a and c are correct.arrow_forward
- 1- What is the pressure at the Economizer (in bar)? 2- What is the pressure at the Evaporator (in bar)? 3- How much heat received by the Economizer (kW)? 4- How much heat received by the Evaporator (kW)? 5- How much heat received by the Superheater (kW)? 6- How much heat received by the FWH (KW)?.. 7- How much heat received from the fuel burning (kW)? 8- How much heat rejected at the chimney (kW)?. T=35 C From the Pump m-1.3 kg/s + Cpw=4.2 kJ/kg.C ****************** T=150 C, To the Turbine Cp 1.008kJ/kg.K T=400C 44 T=212.2 X=0.0 X=0.85 Chimney Hoo bou to Economizer Evaporator Super Heater -Air, m-4 kg/s, T=20 C P=5 bar, X=0.8, m=0.3 kg/s from FWH X=1 1 Fuel, T-20 C, m=0.2 kg/s, C.V=33.5 MJ/kg Bumerarrow_forwardO b. True Which part in the mechanical heat pump is used to reduce the refrigerant pressure? Select one: O a. Expansion valve Compressor O c. Condenser O d. Evaporatorarrow_forwardWhich of the following is true regarding the refrigerantpiping on a rooftop package unit?A. The discharge and liquid lines must be field installed.B. The suction and liquid lines must be field installed.C. The discharge and suction lines must be field installed.D. No refrigerant lines are field installed.arrow_forward
- The approach temperature for the evaporator isA. the difference between the suction and head pressuresconverted to temperature.B. the difference between the refrigerant boiling temperatureand the suction-line temperature.C. the difference between the refrigerant boiling temperatureand the inlet water temperature.D. the difference between the refrigerant boiling temperatureand the leaving-water temperature.arrow_forwardThe typical temperature difference between the enteringair and the boiling refrigerant on a standard airconditioningevaporator is ______°F.arrow_forwardQuality means _______ when referring to a refrigerant.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Refrigeration and Air Conditioning Technology (Mi...Mechanical EngineeringISBN:9781305578296Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill JohnsonPublisher:Cengage Learning
Refrigeration and Air Conditioning Technology (Mi...
Mechanical Engineering
ISBN:9781305578296
Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher:Cengage Learning
The Refrigeration Cycle Explained - The Four Major Components; Author: HVAC Know It All;https://www.youtube.com/watch?v=zfciSvOZDUY;License: Standard YouTube License, CC-BY