Cooling performance can be improved by sub-cooling the liquid before it arrives at the expansion valve. Without the in-line heat exchanger, the ambient air will normally transfer heat to suction line. The in-line heat exchanger can transfer heat from the liquid line to the suction line and increase the sub-cooling of the liquid. At the same time, the suction line is heated and the suction gas will arrive drier to the compressor, and the risk for compressor failures due to droplets is reduced.

Example of connections

Increased cooling system performance.

Rule of thumb:
1°C increased sub-cooling temperature results in up to 0.5 percent better cooling performance

Reduce the risk for compressor failure by evaporating liquid refrigerant droplets in the suction line heat exchanger.
 

Various design are possible - Ask Hydro!

Hydro has developed an extruded coaxial tube especially for suction-line heat exchangers. The coaxial tube can withstand high pressures and is therefore well suited for refrigerants with high working pressures. In addition, increased sub-cooling in the liquid line will give the expansion valve better working conditions. This can lead to more stable superheating control of the evaporator and result in better cooling capacity.