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Hot Gas Defrosting System Design

Hot Gas Defrosting System Design

Hot Gas Defrosting System Design

(OP)
Hi, I am designing the defrosting system for a box @ -18 C. I installed one solenoid valve on liquid line and another one on hot gas line. Do I need to put one valve (check valve or solenoid valve) on discharge line between compressor and condenser inlet? I checked a few books and found it was not on the diagram. But when I did some test with only two valves I installed, it seems to me there was some liquid running from condenser to the hot gas line during defrosting cycle.
Any input will be appreciated.

Cheers,

RE: Hot Gas Defrosting System Design

Your take off should be on top of discharge line and gas should be very close to the compressor if its too far you may be desuperheating too much For a full explanation go here: http://www.sporlan.com/90-40.pdf

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