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 44, Problem 2RQ
An important factor (or factors) involving water quality with regard to open-loop heat pump systems is(are)
A. water temperature.
B. water cleanliness.
C. water volume in gpm.
D. all of the above.
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c) Assess the limiting factors that impact on the economics of heat pumps.d) Conduct a cost-benefit analysis on the installation of a ground source heat pump on asmallholding, and make valid recommendations for improvements.
4. (It's impossible for a heat engine to produce net work in a complete cycle if it exchanges
heat only with bodies at a single fixed temperature). this statement refer to:
A. 1 law of thermodynamic B. 2nd law thermodynamic C. Gibss-Dalton law
5. The cycle consist of two isothermal processes joined by two adiabatic process is called:
A. Carnot cycle
B. Refrigeration cycle
C. Gas turbine cycle
6. Steam at 800 kPa, 300°C is throttled to 200 kPa. The final temperature will be:
A. 292 °C
B. 302 °C
C. 298 °C
a) State whether the following statements are true or false
A process must satisfy the first law to occur, however, satisfying the first law does not
ensure that the process will take place.
ii.
A heat engine must reject waste heat into a low temperature sink to operate.
A cyclic device that transfers heat from a cold medium to a warmer medium is only
possible to be built if there is a provision for work input.
The Carnot cycle is the most efficient thermodynamic cycle operating between two
specified temperatures and can have as much efficiency as 100%.
iii.
iv.
Chapter 44 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 44 - Geothermal heat pumps, or water-source heat pumps,...Ch. 44 - An important factor (or factors) involving water...Ch. 44 - Explain the ground loop or water loop of a...Ch. 44 - Explain the refrigerant loop of a closed-loop,...Ch. 44 - The__________loop is used to distribute heated or...Ch. 44 - True or False: Domestic hot water can be heated...Ch. 44 - Prob. 7RQCh. 44 - Antifreeze solutions that can be used in the...Ch. 44 - What is the main difference between a copper and a...Ch. 44 - A(n) ______well draws water from the top of...
Ch. 44 - Which of the following is a process in which a...Ch. 44 - The function of the pressure tank in an open-loop,...Ch. 44 - If 14 gpm of water is flowing through an open-loop...Ch. 44 - Explain the operation/purpose of the buffer tank...Ch. 44 - How will oversizing the buffer tank on a...Ch. 44 - Explain why a waterless, earth-coupled,...Ch. 44 - Explain how refrigerant and oil leakage are found...Ch. 44 - What kind of material is used in the waterless...
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- Explain with a neat diagram with all parameters, the components and working of a heat pump system.arrow_forward2) A heat pump with the amount of heat of liquid refrigerant (mix) when it will enter the expansion of 480 Btu/lb. while the amount of heat from the refrigerant vapor after leaving the evaporator is 412 Btu/lb. What is the coefficient of performance (COP) if the heat amount of the superheated refrigerant after being compressed by the compressor has a value of 572 Btu/lb?arrow_forward4.) Why must a room air conditioner be placed in a window rather than just set on the floor and plugged in? Why can a refrigerator be set on the floor and plugged in?arrow_forward
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- A 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_forwardDifferentiate refrigerator and heat pump.arrow_forwardAn electric motor drives a large air conditioner in a temperature controlled laboratory which handles all test samples for a major pharmaceutical company. There is no standby air conditioner, but there is a spare motor in the company’s stores. What classification would you assign to the air conditioner? Explain the reasoning behind your answer.arrow_forward
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