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 18RQ
What kind of material is used in the waterless ground loop in a waterless, earth-coupled, closed-loop geothermal heat pump system?
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Use ashrae table and charts for reference state
01. 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?
What is a heat pump and explains its purpose?
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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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 a heat sink?arrow_forwardDraw the schematic and p-h diagram for the problem below: A two-stage cascade refrigeration system uses ammonia as refrigerant. The mass flow rate in the high-pressure loop is 0.10 kg/s. The condenser saturated temperature is 38 degree Celsius and the evaporator temperature is -40 degree Celsius. The cascade condenser is a direct contact type. Determine a.) the refrigerating effect in tons of refrigeration, b.) the power required, and c.) the COP.arrow_forward14. A 220-volt electrical heater is used to warm 6Li/hr of water from 25°C to 93°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. 3.2160Ampsarrow_forward
- provide solutions using the ASHRAE tables and chartsarrow_forwardUSE THE REFRIGERANT TABLE MODULE : THERMODYNAMICS QUESTION 4 Consider a two-stage cascade refrigeration system operating between the pressure limits of 1.6 MPa and 140 kPa with refrigerant-134a as the working fluid. Heat rejection from the lower cycle to the upper cycle takes place in an adiabatic counterflow heat exchanger where the pressure in the upper and lower cycles are 0.4 and 0.6 MPa, respectively. In both cycles, the refrigerant is a saturated liquid at the condenser exit and a saturated vapour at the compressor inlet, If the mass flow rate of the refrigerant through the lower cycle is 0.4 kg/s, determine the COP of this refrigerator. NOTE: Your answer should be in 2 decimal places and do not include SI units in your answer when puting it in the answer boxarrow_forwardWhat are the different Heat pump circuits? Explain any one of them with the help of neat sketcharrow_forward
- USE THE REFRIGERANT TABLES MODULE : THERMODYNAMICS QUESTION 3 Consider a two-stage cascade refrigeration system operating between the pressure limits of 1.6 MPa and 140 kPa with refrigerant-134a as the working fluid. Heat rejection from the lower cycle to the upper cycle takes place in an adiabatic counterflow heat exchanger where the pressure in the upper and lower cycles are 0.4 and 0.6 MPa, respectively. In both cycles, the refrigerant is a saturated liquid at the condenser exit and a saturated vapour at the compressor inlet, If the mass flow rate of the refrigerant through the lower cycle is 0.4 kg/s, determine the mass flow rate of the refrigerant through the upper cycle, NOTE : Your answer should be in 2 decimal places and do not include the SI units when puting your answer in the answer boxarrow_forwardThe figure-of-merit indicating the quality of a refrigeration unit is usually the coefficient of performance COP ≡ heat absorbed/net work put in What is the COP for this magnetic refrigeration device? (use wnet = 100 J/mol)arrow_forwardMay you help me with thatarrow_forward
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