What is a Chiller Economizer

I explain what a economizer is on a chiller. These components are used to improve efficiency by increasing subcooling and in some cases removing the flash gas.
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[@Eighty8Fitter]

Refrigeration racks use subcoolers quite often. Improving efficiency is the overall name of the game.

[@Ingmaringmar]

In screw compressors the subcooler is connected to the eco port of te compressor, with a different (higher) pressure than suction pressure. (This is where the efficiency gain is). How is that for centrifugal compressors?

[@HVACGUY]

Gree flexx hs those before liquid line to add subcooling.

[@isaiahlewis3832]

What’s making the vapor rise to the top of the flash tank ?

[@HVACTIME]

Vapor is less dense than liquid. Vapor rises on top and the liquid collects in the bottom.

[@isaiahlewis3832]

The condenser is sending liquid refrigerant to the flash tank how is that liquid being turned into a gas ? & does it has something to do with pressurization or expansion and how ?

[@HVACTIME]

Through a expansion valve. There is a expansion valve prior to the flash tank that creates the flash gas.

[@isaiahlewis3832]

Thank you so much & when u say create the flash gas that means changing the state correct ?

[@HVACTIME]

@isaiahlewis3832 correct, charging state

[@irfvnfaedah5776]

Sr ,may u help me, on york yciv
Is there the High pressure cut out at system 1 is serial with system 3 on logic board

[@NickPhilly215]

Is it ok to think chiller economisers are similar to hot gas bypass, by the concept of keeping a load on the chiller?

[@HVACTIME]

No, different concept

[@NickPhilly215]

@@HVACTIME ok I understand thank you