The operating temperature of a cold storage is -2°C. The heat leakage from the surrounding is 30 kW for the ambient temperature of 40°C. The actual C.O.P. of refrigeration plant used is one fourth that of ideal plant working between the same temperatures. The power required to drive the plant is

Refrigeration and Air Conditioning
The operating temperature of a cold storage is -2°C. The heat leakage from the surrounding is 30 kW for the ambient temperature of 40°C. The actual C.O.P. of refrigeration plant used is one fourth that of ideal plant working between the same temperatures. The power required to drive the plant is

18.6 kW

7.44 kW

1.86 kW

3.72 kW

18.6 kW

7.44 kW

1.86 kW

3.72 kW

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Refrigeration and Air Conditioning
Which of the following refrigerant has the lowest freezing point?

R-22

R-12

R-11

Ammonia

R-22

R-12

R-11

Ammonia

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Refrigeration and Air Conditioning
In which of the following refrigeration system, waste heat can be effectively used?

None of the listed here

Vapour absorption cycle

Vapour compression cycle

Air refrigeration cycle

None of the listed here

Vapour absorption cycle

Vapour compression cycle

Air refrigeration cycle

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Refrigeration and Air Conditioning
A refrigeration system

Removes heat from a low temperature body and delivers it to a high temperature body

Removes heat from a high temperature body and delivers it to a low temperature body

None of the listed here

Rejects energy to a low temperature body

Removes heat from a low temperature body and delivers it to a high temperature body

Removes heat from a high temperature body and delivers it to a low temperature body

None of the listed here

Rejects energy to a low temperature body

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Refrigeration and Air Conditioning
The higher temperature in vapour compression cycle occurs at

Expansion valve

Compressor discharge

Receiver

Evaporator

Expansion valve

Compressor discharge

Receiver

Evaporator

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Refrigeration and Air Conditioning
In actual air-conditioning applications for R-12 and R-22, and operating at a condenser temperature of 40° C and an evaporator temperature of 5° C, the heat rejection factor is about

1.25

5.12

1

2.15

1.25

5.12

1

2.15

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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning Which of the following refrigerant has the lowest freezing point?

Refrigeration and Air Conditioning In which of the following refrigeration system, waste heat can be effectively used?

Refrigeration and Air Conditioning A refrigeration system

Refrigeration and Air Conditioning The higher temperature in vapour compression cycle occurs at

Refrigeration and Air Conditioning In actual air-conditioning applications for R-12 and R-22, and operating at a condenser temperature of 40° C and an evaporator temperature of 5° C, the heat rejection factor is about

Refrigeration and Air Conditioning
Which of the following refrigerant has the lowest freezing point?

Refrigeration and Air Conditioning
In which of the following refrigeration system, waste heat can be effectively used?

Refrigeration and Air Conditioning
A refrigeration system

Refrigeration and Air Conditioning
The higher temperature in vapour compression cycle occurs at

Refrigeration and Air Conditioning
In actual air-conditioning applications for R-12 and R-22, and operating at a condenser temperature of 40° C and an evaporator temperature of 5° C, the heat rejection factor is about