A refrigeration system is to be designed to maintain the temperature in the range of -15°C to -5°C, while the outside temperature varies from 15°C to 25°C. The total thermal load on the storage unit is given as 20 kW. Obtain an initial design for the vapor compression refrigeration system shown below. For safe operation and other factors, such as additional energy transfer, design the system using a safety factor of 1.3 such that Q₁ = 26 kW. The compressor efficiency could range from 60 to 80 percent. This is to be completed individually. It would be highly unlikely for multiple students to select all the same design parameters in part (a).

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
Chapter44: Geothermal Heat Pumps
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set the constraints yourself for part a

A refrigeration system is to be designed to maintain the temperature in the range of -15°C to -5°C,
while the outside temperature varies from 15°C to 25°C. The total thermal load on the storage unit is
given as 20 kW. Obtain an initial design for the vapor compression refrigeration system shown below.
For safe operation and other factors, such as additional energy transfer, design the system using a
safety factor of 1.3 such that Q₁ = 26 kW. The compressor efficiency could range from 60 to 80 percent.
This is to be completed individually. It would be highly unlikely for multiple students to select all the
same design parameters in part (a).
Expansion
valve or D
capillary tube
Он
Condenser
Evaporator
QL
Compressor
at
Work
As part of the design, you should:
a) Specify and justify the constraints (isentropic efficiency, condenser, and evaporator
temperature) you chose.
b) Show the cycle in relation to the two-phase region on a temperature-entropy (T-S) diagram.
Transcribed Image Text:A refrigeration system is to be designed to maintain the temperature in the range of -15°C to -5°C, while the outside temperature varies from 15°C to 25°C. The total thermal load on the storage unit is given as 20 kW. Obtain an initial design for the vapor compression refrigeration system shown below. For safe operation and other factors, such as additional energy transfer, design the system using a safety factor of 1.3 such that Q₁ = 26 kW. The compressor efficiency could range from 60 to 80 percent. This is to be completed individually. It would be highly unlikely for multiple students to select all the same design parameters in part (a). Expansion valve or D capillary tube Он Condenser Evaporator QL Compressor at Work As part of the design, you should: a) Specify and justify the constraints (isentropic efficiency, condenser, and evaporator temperature) you chose. b) Show the cycle in relation to the two-phase region on a temperature-entropy (T-S) diagram.
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