Mat

Liquid feed temperature -21 C and wet return -39 C. One reason for this disparity may be the location of temperature sensor at in feed and evaporator starving of liquid. I mean there is less feeding to evaporator and the liquid line contains lot of flash gas and the sensor is on the top surface of horizontal pipe which senses gas temperature (12 O clock position) The temperature sensor should be at 4 O clock position and it should be covered with insulation material.