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Thread: walk in freezer
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25-08-2009, 06:42 AM #4
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Re: walk in freezer
If condensing unit is matched to compressor than I would say no. Reason is because heat load in freezer is increased with heat from air infiltration and thru the walls because of high ambient. That additional heat load is slowing your pull down time.
First you size evaporator according to heat load, then you size compressor by required refrigerant mass flow for given conditions, then you size condenser which is able to get rid of heat from evaporator plus heat from mechanical work of compressor, but in your ambient temperature. Than you size TXV according to evaporator capacity, system pressures and pressure losses at pipes and evaporator distributor.
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