Quote Originally Posted by TSK View Post
I have seen this free cooling system in place but not worked on it, refrigerant vapour from the evaporator (+10C water chiller) is allowed to by-pass the compressor using a valve, the vapour travels up to the condenser on the roof and condenses into liquid, the liquid being heaver than gas and affected by gravity stacks up in the liquid line and creates a PD across the expansion valve, saw it for myself, cooling the water by a few degrees but that was all, not sure the result was worth the effort but maybe in the right conditions, V-cold outside by the condenser?
Why bother mucking about with the fridge system when you can install a blast air chiller on the water side of things, we install these and in the winter the fridge plant only runs the water pumps.

Lrac