Refrigeration and Air Conditioning
The comfort conditions in air conditioning are at (where DBT = Dry bulb temperature, and RH = Relative humidity)

20°C DBT and 80% RH
25°C DBT and 40% RH
25°C DBT and 100% RH
22°C DBT and 60% RH

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Refrigeration and Air Conditioning
The bypass factor of a cooling coil decreases with

Decrease in fin spacing and increase in number of rows
Decrease in fin spacing and decrease in number of rows
Increase in fin spacing and increase in number of rows
Increase in fin spacing and decrease in number of rows

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Refrigeration and Air Conditioning
The bypass factor (B. P. F.) in case of sensible heating of air is (Where td₁ = Dry bulb temperature of air entering the heating coil, td₂ = Dry bulb temperature of air leaving the heating coil, and td₃ = Dry bulb temperature of heating coil)

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

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