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Air Conditioning

Air Conditioning

Air Conditioning

(OP)
Hello,

I may have to put together a air cooling system. One option is to blow air on a finned tube like an evaporator. My question is what if I do not have enough heat in the air to evaporate all the refrigerent? How is this done in standard a/c applications? Are there heaters or expansion tanks used to make sure that only gaseous refrigerent goes into the compressor?

Thanks

RE: Air Conditioning

they are called superheaters.  You restrict the flow through things like: recycles, lower suction pressures.

RE: Air Conditioning

In "standard" a/c the refrigerant flow is metered - typically with a thermal expansion valve - to maintain some level of super-heat leaving the evaporator.

The suction pressure is often monitored, and the compressor will either unload, or shut-off when it drops to low.

Some systems will incorporate a suction accumulator to prevent  liquid from reaching the compressor under unusual operating conditions.

Some systems will incorporate a suction/discharge heat exchanger.

RE: Air Conditioning

If the load is say less then 5 tons you may want to install a variable speed scroll compressor. this will adapt to a variable load better then a compressor with unloading. estimate the prejected load as close as possible

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