Refrigeration and Air Conditioning
A good refrigerant should have

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

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Refrigeration and Air Conditioning
The bypass factor, in case of sensible cooling of air, is given by (where td₁ = Dry bulb temperature of air entering the cooling coil, td₂ = Dry bulb temperature of air leaving the cooling coil, and td₃ = Dry bulb temperature of the cooling coil)

(td₂ -td₃)/( td₁ -td₃)
(td₁ -td₃)/( td₂ -td₃)
(td₃ -td₁)/( td₂ -td₃)
(td₃ -td₂)/( td₁ -td₃)

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