increases COP

decreases COP

COP remains unaltered

other factors decide COP

bigger cabinet should be used

smaller cabinet should be used

perfectly tight vapour seal should be used

refrigerant with lower evaporation temperature should be used

A refrigerant should have low latent heat

If operating temperature of system is low, then refrigerant with low boiling point should be used

Precooling and subcooling bf refrigerant are same

Superheat and sensible heat of a. refrigerant are same

bigger

smaller

equal

smaller/bigger depending on capacity

ineffective refrigeration

high power consumption

freezing automatic regulating valve

corrosion of whole system