Industrial chillers - Types, Working Principle And Maintenance

Industrial chillers are most commonly used for dehumidifying air in commercial and industrial facilities. How do these devices keep the water cool? Well, industrial chillers remove heat from a liquid using a vapor compression or absorption cycle. The cool liquid that is produced by the industrial chillers, is further circulated through a heat exchanger. The chilled water that is dehumidified during this process is used for all kinds of industrial applications including food processing, equipment cooling and etc.


Three types of industrial chillers stand out on the market. All these three models are powered by steam, gas turbines or electric motors. Of course each model has its own advantages and disadvantages, it's up to you to choose the one that will increase your productivity, reduce costs, optimize industrial applications and meet all your industrial chilled water needs.

  • Water Cooling Industrial Chillers - Water chillers use closed loop system to transfer and remove heat.
  • Evaporative Coolers – Evaporative industrial chillers use 70% less energy than air chillers, which means they are cheaper than any other chiller. These industrial chillers cool air through the evaporation of water.
  • Air Cooling Chillers – These types of chillers are most commonly used in air conditioning systems. Unlike evaporative industrial chillers, air ones absorb heat from process water. Air cooling chillers require less maintenance than water ones and can work without a cooling tower or a condenser water pump.

Working Principles

Industrial chillers consist of 4 basic components such as an evaporator, a compressor, a condenser and an expansion valve. Normally, the condenser acts as a two fold component. First the vapor must be super heated, so that condensation can happen. In order to occur condensation, enough heat must be transferred from the refrigerant. Once condensation happens, heat continues to transfer from the refrigerant vapor to the air or water condenser. The thermostatic expansion valve functions as an adjustable restriction that lowers that liquid refrigerant pressure and maintains constant heat at the evaporator outlet. The final step includes mixture of saturated liquid and vapor that travels via the evaporator tubing. Then, warm air is blown all over the evaporator, so that heat is transferred directly to the boiling refrigerant.


Industrial chillers are designed to last for years. If maintained on a regular basis, these devices will perform at peak efficiency. Proper care is a must, if you want to increase the efficiency of these industrial chillers. Make sure you follow the recommended maintenance schedule.