Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN: 9781305578296
Author: John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher: Cengage Learning
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Chapter 45, Problem 23RQ
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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
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- Where must a suction-line drier be placed in a heat pump after a motor burnout?arrow_forwardIn the mechanical heat pump, what is the type of process that occurs in the expansion valve? Select one: a. Isentropic. b. Adiabatic. c. Isobaric. d. Isothermal. Question /arrow_forwardA 1-ton air conditioner is a unit that will remove the amount of heat neededto melt one ton of ice in 24 hours. A ton has 2,000 pounds in it.a. If 144 Btu of heat are needed to melt 1 pound of ice, how many Btus woulda 1-ton air conditioner remove in 24 hours?b. How many Btus would a 1-ton air conditioner remove in 1 hour?arrow_forward
- What is the static air powering watts of a fan designed to deliver 800m3/hr of air with static pressure of 5cm of water column on full delivery.a. 155.3 b. 95.7 c. 105.8 d. 122.6arrow_forwardExplain Compressor?arrow_forwardThe Working fluid in heat pumps is called _______ Which is not a thermal energy sink a. Atmosphere b. Hot air in the over during the baking process of potatoes in an oven c. Oceans d. Surrounding air in the room that houses the TV set e. None of the above For the adiabatic efficiency of a ____ the actual output work is always less than the work obtained if the expansion occurred in an isotropic manner a. nozzle b. compressor c. turbine d. pumparrow_forward
- Describe the Mass Balance for Steady-Flow Processesarrow_forwardIn a heat pump, 15% of the heat is from the heat generated running thecompressor. The rest is from the exchange of heat with the air or ground.How much heat is generated running the compressor of a 11⁄2-ton heatpump? (1 ton is equivalent to 12,000 Btu/hr.)arrow_forwardSelect the picture that shows the process of a heat pump_________ A. Device A B. Device B C. Device Carrow_forward
- Draw a neat diagram and explain the working principle of a two-stage reciprocating air compressor?arrow_forwardO a. None of these O b. Absolute pressures and heat capacity ratio O C. Absolute pressures and temperatures O d. Gauge pressures and temperatures In perfect gas law experiment, the pressure pump coupling is used to connect the vacuum vessel to the pump discharge connector. Select one: O a. False O b. True Which part in the mechanical heat pump is used to reduce the refrigerant pnessule? Select one:arrow_forwardWhen you are using a fan ___________________ energy is converted into ________________ energy Electrical; Mechanical Electrical; Light Mechanical; Electrical Light; Mechanicalarrow_forward
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