Refrigeration and Air Conditioning
A human body feels comfortable when the heat produced by the metabolism of human body is equal to the

Heat stored in the human body
Heat dissipated to the surroundings
Sum of (A) and (B)
Difference of (A) and (B)

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Refrigeration and Air Conditioning
A good refrigerant should have

High specific volume and high latent heat of vaporisation
High operating pressures and low freezing point
Low C.O.P. and low freezing point
High latent heat of vaporisation and low freezing point

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