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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Textbook Question
Chapter 44, Problem 5RQ
The__________loop is used to distribute heated or cooled air to the building of a geothermal heat pump system.
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11. Five large hotels in Miami, USA, use their own air-conditioning units, which
have a c.o.p. 3.1. It is proposed that the cooling systems of the five hotels be
substituted with a larger, modern unit that would have a c.o.p. 3.7. The total
installed capacity of the five hotels is 2,600 tons of air-conditioning and the
current systems are in use for 3,200 hours every year. Determine: a) the annual
energy savings from this substitution and b) the annual avoidance of CO₂
emissions if, currently, 72% of the electric energy in the Miami area is
obtained from coal power plants and 28% from nuclear power plants.
Define the objective of a heat pump is to supply heat QH into the warmer space.
17. A 220-volt electrical heater is used to warm 6Li/hr of water from 25°C to 98°C. Assume heat
conversion loss of 23% of the total heat supplied, how much current in amperes must be supplied
to this heater.
a. 3.0072Amps
b. 2.9957Amps
c. 2.8012Amps
d. 3.2160Amps
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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- What is a heat pump and explains its purpose?arrow_forward3. Generate the SFEE equations for the following process equipment with neat diagrams: 1. Air Compressor 2. Boiler 3. Shell & Tube Heat Exchanger 4. Evaporator 5. Condenser 6. Cooling Towerarrow_forward01. A refrigerant 22 system having a refrigerating capacity of 55 kW operates with an evaporating temperature of 5°C and rejects heat to water cooled condenser. The compressor is hermetically sealed. The condenser has a U value of 450 W/m².K and a heat-transfer area of 18 m? and receives a flow rate of cooling water of 3.2 kg/s at a temperature of 30°C. What is the condensing temperature?arrow_forward
- Select the picture that shows the process of a heat engine_________ A. Device A B. Device B C. Device Carrow_forwardAn 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.arrow_forwardCan a heat pump switch from heating to cooling and from cooling to heating automatically?arrow_forward
- The function of the pressure tank in an open-loop, geo-thermal heat pump well system is to prevent the well pump from _____.arrow_forwardDefine net refrigeration effect as it applies to the refrigeration cycle.arrow_forwardA 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 Answerarrow_forward
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