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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
A bootstrap air cooling system has

Four heat exchangers
Three heat exchangers
One heat exchanger
Two heat exchangers

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Refrigeration and Air Conditioning
Which of the following cycles uses air as the refrigerant?

Ericson
Bell Coleman
Carnot
Stirling

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Refrigeration and Air Conditioning
Air refrigeration cycle is used in

Air conditioning
Gas liquefaction
Commercial refrigerators
Domestic refrigerators

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Refrigeration and Air Conditioning
An infinite parallel planes with emissivities e₁ and e₂, the interchange factor for radiation from surface 1 to surface 2 is given by

(e₁ + e₂)/ e₁ + e₂ - e₁e₂
e₁e₂
e₁ + e₂
1/e₁ + 1/e₂

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Refrigeration and Air Conditioning
The bank of tubes at the back of domestic refrigerator is

Condenser tubes
Capillary tubes
Refrigerant cooling tubes
Evaporator tubes

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Refrigeration and Air Conditioning
A refrigeration cycle operates between condenser temperature of + 27°C and evaporator temperature of -23°C. The Carnot coefficient of performance of cycle will be

5
1.2
0.2
6

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