How does an industrial water chiller work?
The main components of the chiller are: compressor, condenser, evaporator, dry filter, expansion valve, circulation pump, float sensor, thermal water tank, PID control board and so on. So how do they work?
Firstly, the float switch will open to fill the water tank, when the water level reaches a certain point, float switch automatically closed. Then the compressor starts working and compressed high pressure gas flow to the condenser. In the condenser, it indirectly contacts with water from cooling tower. For an air cooled chiller, the gas will indirectly contact with air in the warped type condenser. Heat exchange happen as the fan works to produce constant air flow. At this time the temperature of the refrigerant drops, and it flows to dry filters. The impurities will be filtered out from the refrigerant in cycle system, as well as the moisture in it. After flow to expansion valve, the decompression low temperature refrigerant flow into the evaporator. Here it will take away the heat of circulating chilled water indirectly. After that, the refrigerant will re-flow to the compressor.
PID Temperature Control
The components of water chiller work in such a cycle until the temperature of the water drops to the lower limit set by us. Then the PID control board will notify the compressor to stop working. When the temperature rise over the temperature we set, the PID control board will notify the compressor to work again.
For a 5 HP water chiller, we usually use 50l water tank so it can ensure the compressor has enough time to have a rest. Thus it will not only improve the service life time of the compressor, but also can save energy.
The water circulating pump is responsible for transferring the water in tank to mold or the parts we need to cool. Chilled water cycle continuously, and continue to take the heat away of mold.
This is the basic working principle of the water chiller. Additionally, water cooled chiller system needs to be used with the cooling tower, but the air cooled chiller does not need it. Both of them can reach perfect cooling effect, you can choose any type you would prefer according to realistic situation.
Water chiller is an important device in temperature control area, which will play a helpful role in your company operation. To know the models, please click the specification for air cooled water chiller and water cooled chiller as below, or contact LCEQ team via the contact form.