A domestic refrigerator sits in a kitchen, switched on, with the refrigerator door wide open. The kitchen itself is well insulated and it can be assumed no heat can escape or enter the kitchen from the outside. Which of the following is the most accurate statement. a. The temperature in the kitchen will go down very slightly. O b. The temperature in the kitchen could go up or down, depending on the Coefficient of Performance (COP) of the refrigerator. O c. The temperature in the kitchen could go up or down depending on the mechanical efficiency of the compressor. O d. The temperature in the kitchen will stay the same. O e. The temperature in the kitchen will go up very slightly.

A domestic refrigerator sits in a kitchen, switched on, with the refrigerator door wide open. The kitchen itself is well insulated and it can be assumed no heat can escape or enter the kitchen from the outside. Which of the following is the most accurate statement. a. The temperature in the kitchen will go down very slightly. O b. The temperature in the kitchen could go up or down, depending on the Coefficient of Performance (COP) of the refrigerator. O c. The temperature in the kitchen could go up or down depending on the mechanical efficiency of the compressor. O d. The temperature in the kitchen will stay the same. O e. The temperature in the kitchen will go up very slightly.

Name: A domestic refrigerator sits in a kitchen, switched on, with the refr
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Description: A domestic refrigerator sits in a kitchen, switched on, with the refrigerator door wide open.The kitchen itself is well insulated and it can be assumed no heat can escape or enter the kitchen from the outside.Which of the following is the most accur

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter42: Heat Gains And Heat Losses In Structures

Section: Chapter Questions

Problem 8RQ: If a heating system was being designed for use in Modesto, California, what temperature difference...

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A domestic refrigerator sits in a kitchen, switched on, with the refrigerator door wide open. The kitchen itself is well insulated and it can be assumed no heat can escape or enter the kitchen from the outside. Which of the following is the most accurate statement. The temperature in the kitchen will go down very slightly. b. The temperature in the kitchen could go up or down, depending on the Coefficient of Performance (COP) of the refrigerator. The temperature in the kitchen will stay the same. O d. The temperature in the kitchen could go up or down depending on the mechanical efficiency of the compressor. Oe. The temperature in the kitchen will go up very slightly.
A domestic refrigerator sits in a kitchen, switched on, with the refrigerator door wide open. The kitchen itself is well insulated and it can be assumed no heat can escape or enter the kitchen from the outside. Which of the following is the most accurate statement. а. The temperature in the kitchen will stay the same. O b. The temperature in the kitchen could go up or down depending on the mechanical efficiency of the compressor. O c. The temperature in the kitchen will go down very slightly. d. The temperature in the kitchen could go up or down, depending on the Coefficient of Performance (COP) of the refrigerator. е. The temperature in the kitchen will go up very slightly.
A system temperature and pressure becomes equal to that of the earth and transfer of energy ceases is known as unavailable energy Select one: O True O False One tonne of refrigeration is equal to 0.035 W. Select one: O True O False Which statement is FALSE O A. Impeller is absent in reciprocating compressor O B. Diffuser is present in reciprocating compressor O C. Rotary compressors are the capability of running at high speeds O D. Reciprocating compressors are bulky
Which of the following statement(s) is(are) correct? Thermal energy with some effort, can only be partially converted to mechanical energy. If a system's work is positive, work is done to the system; work done by the system is negative. N. For a closed system operating adiabatically, work is obtained from the direct conversion of internal energy of the fluid to work. Work or mechanical energy can spontaneously be converted to heat.
A house is heated and maintained at 20 °C by a heat pump. Part A Part B Based on these results, would you recommend heat pumps at locations with a severe climate? Match the words in the left column to the appropriate blankes in the sentences on the right. Reset Help mild 1. Given that a real heat pump is significantly efficient than a Carnot heat pump, the increases advantage of a heat pump over electric heating rapidly when the outside temperature becomes really low. less more 2. As the COP decreases, the heating power decreases 3. A heat pump is ideal for a climate. severe Submit Request Answer
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C, The air pressure and temperature increase while the volume decrease O d. The air pressure and temperature decrease while the volume increase Which of the following does not help in collecting results in the mechanical heat pump? Select one: O a. Pressure gage b. Flowmeter C. Wattmeter O d. Receiver
Which of the following statement(s) is(are) correct? a. For closed system operating adiabatically, work is obtained from the direct conversion of internal enerft of the fluid to work. b. Work or mechanical energy can spontaneously be converted to geat. c. Thermal energy with some effort, can only be partially converted to mechanical energy. d. If a system's work is positive, work is done to the system; work done by the system is negative.
Which of the following are correct and valid for the Kelvin-Plank statement? O a. Any device O b. Kelvin- Planck O c. It is possible for any O d. No heat engine can have a thermal O e. Kelvin- Planck O f. It is impossible O g. It is impossible for any device O h. It is impossible that statement statement to construct to construct of the second law is device that a device that a device that violates of the efficiency of 100 second law is the that operates in a cycle and produces no effect other than Kelvin- operates in a cycle and produces no effect other than operates negative statement, and a operates on a cycle to receive heat from a single reservoir Planck percent, or as for a positive statement, and a positive on a cycle to receive heat statement power plant to operate, the working fluid also violates negative statement the from a statement the transfer the transfer single reservoir and Clausius cannot be can be of heat from and of heat from a lower- temperature body to a higher-…
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QUESTION 1 A 120-ton capacity chiller, based on a refrigeration cycle, is used to maintain a coolant temperature of 35 deg. F. The chiller exchanges heat to the surrounding air at 70 deg. F. This unit utilizes a 150 hp motor. What is the rate of heat removal from the coolant, in Btu/hr? O1,440,000 O 381,675 O 1,821,675 O 120 QUESTION 2 A powerplant operates between a furnace at 990 deg. Fand cooling water delivered from a nearby river at 70 deg. F. What is the maximum possible efficiency of this powerplant, in %? Oa. 72.8% Ob. 27.2% Oc 92.9% Od.63.4% QUESTION 3 If fuel oil is supplied to a power plant furnace at a rate of 60,000 gallons/hr, and the oil has a heating value of 150,000 Btu/gallon, and the plant has a thermal efficiency of 30%, what is the power output of this plant (in MW)? Oa. 2637.6 Ob.9000 Oc 2700 d. 791.3
In a calorimeter, the space between the outer vessel and an inner vessel acts as a Select one: O a. heat insulator O b. Work conductor O C. Heat absorber O d. heat conductor