Refrigeration and Air Conditioning
For proper refrigeration in a cabinet, if the temperature and vapour pressure difference between cabinet and atmosphere is high, then

Perfectly tight vapour seal should be used
Smaller cabinet should be used
Refrigerant with lower evaporation temperature should be used
Bigger cabinet should be used

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Refrigeration and Air Conditioning
The bypass factor for a cooling coil

Increases with increase in velocity of air passing through it
Decreases with increase in velocity of air passing through it
Remains unchanged with increase in velocity of air passing through it
May increase or decrease with increase in velocity of air passing through it depending upon the condition of air entering

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