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Re: Desuperheating by liquid injection
On freezing plants with -0.3 bar in suction, we still run with a PM valve on the discharge to keep the discharge at 30C, if we do this, we can use the same oil separators on -0.3 bar suction, or at 3.5 bar suction to prevent any accidental oil loss in case of a "alarm stop" on the compressor... we have a "fineoil separator" incorporated in our design, so we can run on any pressures you say and still get 99% of the oil loss back into the compressor suction... we design our freezing systems with two PM valves, so when you need a defrost, we shut of all hotgas to the condenser because the condenser PM is on 0.1 bar higher pressure. and lead it all to the plate freezer or evaporator that needs the hotgas... sure we are like the most expensive air--air-split unit
but after awhile, we will give you more back for your buck...
Of course you could add a full speed condenser pump, but with a regulating valve at the outlet of the condenser... where is the gain, with the full speed pump with the trothling valve, or with the VFD pump with a full open outlet?-Cheers-
Tycho