how to increase the portion of liquid after TXV

[Gary]

Thanks a lot for your reply. Could you give me some more information about two suction/liquid heat exchangers? I am not quite clear.

With the TXV bulb mounted between the heat exchangers, normal superheat can be maintained at the bulb (and at the compressor) while the superheat at the evaporator outlet is very low. In effect, the suction side of the second heat exchanger becomes an extension of the evaporator.

On the liquid side, going through two heat exchangers maximizes the liquid subcooling which minimizes flashing at the evaporator inlet.

Both of these factors add up to maximum liquid ratio in the evaporator without endangering the compressor.