Refrigeration is a process to decrease and maintain the temperature of a space or an object to be lower than the environment temperature.

In decreasing and maintaining the temperature of a target area to be lower than the temperature outside, the heat will have to be removed from the area and

At the present time, there is the use of the refrigerant called HFC with POE oil to replace former refrigerant called HCFC/CFC with mineral oil for environmental reason and the effect of the Green House Effect.

Refrigeration is a process to decrease and maintain the temperature of a space or an object to be lower than the environment temperature.

A factor encouraging the wasteful use of energy is the weather. Thailand is considered a tropical country which resulted in the necessity of the use of air conditioning systems in most of the industrial factories. The systems do not just give the proper cool temperature, but also control the quality of the products.