Thermal Edge Inc | The Advantages of a Thermal Expansion Valve for Enclosure Cooling Systems

Many enclosure air conditioners are designed similarly to residential cooling systems. They use a compressor to pump refrigerant through a condenser and an evaporator and remove heat from the enclosed air.The evaporator coil is located in the enclosure air path, where the refrigerant exists in the form of a vapor that removes heat from the environment. The refrigerant is then compressed and pumped to a condenser located outside the enclosure where it returns to liquid form and releases all the heat it absorbed from inside the enclosure. The refrigerant then changes from a liquid into a vapor as it passes into the evaporator through a small orifice. This process is continuously repeated to maintain a consistently cool temperature within the enclosure.
While this system can use a capillary tube with a fixed orifice to change the refrigerant from the liquid phase to the vapor phase, a better way to achieve the reliable cooling required in an electrical enclosure is to use a thermal expansion valve.  Read More