The C.O.P. of a refrigeration cycle with lowering of condenser temperature, keeping the evaporator temperature constant, will

Refrigeration and Air Conditioning
The C.O.P. of a refrigeration cycle with lowering of condenser temperature, keeping the evaporator temperature constant, will

Decrease

Increase

Remain unaffected

May increase or decrease depending on the type of refrigerant used

Decrease

Increase

Remain unaffected

May increase or decrease depending on the type of refrigerant used

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Refrigeration and Air Conditioning
Presence of moisture in a refrigerant affects the working of

Condenser

Expansion valve

Evaporator

Compressor

Condenser

Expansion valve

Evaporator

Compressor

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Refrigeration and Air Conditioning
Environmental protection agencies advice against the use of chlorofluorocarbon refrigerants since

These react with plants and cause greenhouse effect

These react with ozone layer

These react with oxygen and cause its depletion

These react with water vapour and cause acid rain

These react with plants and cause greenhouse effect

These react with ozone layer

These react with oxygen and cause its depletion

These react with water vapour and cause acid rain

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Refrigeration and Air Conditioning
During sensible cooling,

Partial pressure of vapour remains constant

Specific humidity increases

Wet bulb temperature increases

Relative humidity remains constant

Partial pressure of vapour remains constant

Specific humidity increases

Wet bulb temperature increases

Relative humidity remains constant

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Refrigeration and Air Conditioning
The heat rejection factor (HRF) is given by

1 - (1/C.O.P)

1 + (1/C.O.P)

1 - C.O.P.

1 + C.O.P

1 - (1/C.O.P)

1 + (1/C.O.P)

1 - C.O.P.

1 + C.O.P

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

Lower in winter than in summer

Higher in winter than in summer

Same in winter and summer

Not dependent on season

Lower in winter than in summer

Higher in winter than in summer

Same in winter and summer

Not dependent on season

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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning The C.O.P. of a refrigeration cycle with lowering of condenser temperature, keeping the evaporator temperature constant, will

Refrigeration and Air Conditioning Presence of moisture in a refrigerant affects the working of

Refrigeration and Air Conditioning Environmental protection agencies advice against the use of chlorofluorocarbon refrigerants since

Refrigeration and Air Conditioning During sensible cooling,

Refrigeration and Air Conditioning The heat rejection factor (HRF) is given by

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

Refrigeration and Air Conditioning
The C.O.P. of a refrigeration cycle with lowering of condenser temperature, keeping the evaporator temperature constant, will

Refrigeration and Air Conditioning
Presence of moisture in a refrigerant affects the working of

Refrigeration and Air Conditioning
Environmental protection agencies advice against the use of chlorofluorocarbon refrigerants since

Refrigeration and Air Conditioning
During sensible cooling,

Refrigeration and Air Conditioning
The heat rejection factor (HRF) is given by

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