Evap above compressor - changing compressor type

I have an application in a very small system, where the evaporator is located above a rotary compressor, with integral suction accumulator. The system contains a capillary tube expansion device.

I would like to change the compressor to a hermetic, refrigerator-type, which does not have a suction accumulator. My concern is how to manage potential liquid flood-back from the evaporator & droplet carryover.

I have looked into small suction line accumulators, but these are very difficult to find, at the capacity of the system under consideration. Space is also at a premium.

I'd appreciate advice & applied wisdom on how to achieve this system change in a safe manner, with maximum compressor protection afforded. Thanks so much for your help.

Most rotaries have a SA mounted on it because they could be used widely an many times in reversible systems. But, SA's are not always needed.

I thought that many manufactures have a table where you can read max charge a compressor in a cap system may have.
The sump of a hermetic compressor can hold also some refrigerant.

I don't see much troubles with not adding one.
In the worst case, you always can add a small crankcase heater and make sure you have an oil siphon after the evaporator so that liquid can't flow back.

If it was me, I shouldn't worry to much and leave the SA. What's the new compressor model and refrigerant charge?

Or you can always find a small SA in many small domestic freezers on the scrapyard.

I'm sure, all things you certainly knew but hadn't think about it or you just needed a confirmation of your ideas.

Thanks so much Peter.

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Peter_1:
If it was me, I shouldn't worry to much and leave the SA. What's the new compressor model and refrigerant charge?

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An example here would be the Danfoss SC12G, with max refrigerant charge of 1.3kg. The final system charge will be around 600g, or less.

Quote:

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I'm sure, all things you certainly knew but hadn't think about it or you just needed a confirmation of your ideas.

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:D

http://www.ra.danfoss.com/TechnicalI...3_Cd44p402.pdf

SC12G,n max charge, 1300 grams, so no problem at all.

^ Thanks so much, Peter. I always like to quadruple-check everything before cutting metal.

:)

Also if there is possibility stop with pump-down...