The heat exchanger installed on the suction and liquid line has three advantages:
He subcools liquid refrigerant and increase efficiency.
This reduces the flash gas in the liquid line.
This reduces the liquid refrigerant in the suction line.
The heat exchanger is shown in Fig. 13-84. Heat is transferred from the warmer fluid in the liquid line cold vapor coming from the evaporator. Fig. 13-85 shows the appearance of the heat exchanger. Liquid-cooled 10F 20F (5 to 11C) at the prevailing pressure absorbs more of latent heat. It happens, how it changes to a pair of the evaporator.
Reduction flash vapour (sometimes called "flash-gas") is important. Flash gas (refrigerant evaporates) comes from the sudden change of some of the liquid-vapor. It occurs as a refrigerant passes through refrigerant management. Valve capacity is reduced, increasing the low side pressure drop. The amount of heat each pound of refrigerant absorbs, as it evaporates also decreases. "Associated gas cools the remainder of the liquid to boiling temperature.
Heat exchanger also helps prevent sweat back or frost back on the suction line.
The low temperature of liquid refrigerant in return suction pairs evaporated in the heat exchanger. This occurs as a refrigerant absorbs heat from the liquid line. In supercooled liquids in the liquid line reduces the likelihood of an outbreak of gas, produced in the liquid line. This is especially true in warm days, or if the fluid lines of the long vertical perspective. Pressure losses in the suction line parts of the heat exchanger should be no more than 2 psi (14 kPa).
Industrial 