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

1.86 kW

7.44 kW

18.6 kW

3.72 kW

1.86 kW

7.44 kW

18.6 kW

3.72 kW

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Refrigeration and Air Conditioning
The optimum effective temperature for human comfort is

Lower in winter than in summer

Same in winter and summer

Not dependent on season

Higher in winter than in summer

Lower in winter than in summer

Same in winter and summer

Not dependent on season

Higher in winter than in summer

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Refrigeration and Air Conditioning
The coefficient of performance (C.O.P.) of a refrigerator working as a heat pump is given by

O.P.)P = (

O.P)R

O.P.)R + 1

(

O.P.)R + 2

(

O.P.)P = (

O.P)P = (

(

O.P)R - 1

O.P)P = (

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Refrigeration and Air Conditioning
Vapour compression refrigeration is somewhat like

Reversed Carnot cycle

Carnot cycle

None of these

Reversed Carnot cycle

Carnot cycle

None of these

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Refrigeration and Air Conditioning
Highest temperature encountered in refrigeration cycle should be

Near critical temperature of refrigerant

Above critical temperature

At critical Temperature

Much below critical temperature

Near critical temperature of refrigerant

Above critical temperature

At critical Temperature

Much below critical temperature

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Refrigeration and Air Conditioning
In a pressure enthalpy chart, the space to the left of the saturated liquid line represents

Sub-cooled liquid region

Wet vapour region

None of the listed here

Superheated vapour region

Sub-cooled liquid region

Wet vapour region

None of the listed here

Superheated vapour region

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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning The optimum effective temperature for human comfort is

Refrigeration and Air Conditioning The coefficient of performance (C.O.P.) of a refrigerator working as a heat pump is given by

Refrigeration and Air Conditioning Vapour compression refrigeration is somewhat like

Refrigeration and Air Conditioning Highest temperature encountered in refrigeration cycle should be

Refrigeration and Air Conditioning In a pressure enthalpy chart, the space to the left of the saturated liquid line represents

Refrigeration and Air Conditioning
The optimum effective temperature for human comfort is

Refrigeration and Air Conditioning
The coefficient of performance (C.O.P.) of a refrigerator working as a heat pump is given by

Refrigeration and Air Conditioning
Vapour compression refrigeration is somewhat like

Refrigeration and Air Conditioning
Highest temperature encountered in refrigeration cycle should be

Refrigeration and Air Conditioning
In a pressure enthalpy chart, the space to the left of the saturated liquid line represents