How does a Chilled Water System Work?

When should You Use a Chilled Water System?

As a cooling system, people generally use a chilled water system to cool materials down by removing heat from a liquid via vapor-compression or absorption refrigeration cycle. The liquid gets circulated through a heat exchanger to cool equipment. In a chilled water system, there is always a liquid working a refrigerant going through the heat exchanger in order to transfer the heat energy. When the heat gets absorbed by the liquid, materials get chilled.

How does a Chilled Water System Work?

The chilled water system uses water to cool materials or objects, which removes heat from objects by transferring heat from the air into cold water forced through piping. The water can absorb heat and return the heated water to the chiller where refrigerant rechills the water by chilled water loops. The chilled water system can be applied in a great variety of industrial fields.

Chiller
Chiller

What are the Components of Chillers?

A complete chilled water system is basically composed of the following components: a condenser, a compressor, an evaporator, an expansion valve, a power unit, water boxes and a control unit. The condenser can remove heat from the refrigerant, including air and water cooled condensers. The compressor is the most important component in a chiller system, which can ensure the movement of the refrigerant throughout the system. The evaporator can collect heat from the structure and send it to the cooling tower. The expansion valve can expand the refrigerant to increase its volume, thus allowing the refrigerant to absorb heat in the evaporator. The power unit controls the electricity supply to the chiller. The water boxes usually directs the flow and separates the entrance from the exit. The control unit can observe and manage the performance of a chiller. The above components all play an important role in a good operation of a chiller.

What are Types of Chillers?

There are three major types of chillers in use based on the condenser type, which are air-cooled chillers, water-cooled chillers and evaporative condensed chillers. As their name suggests, the air-cooled chillers use air to remove heat in the condenser by using fans to force air across the exposed tubes of the condenser, while the water-cooled chillers use water to remove heat by using pumps to send water through a sealed condenser. The latter is generally more energy-efficient than air-cooled chillers. The evaporative condensed chillers can condense a substance from its gas state to its liquid state by cooling it. Then the heat is released by the substance and transferred to the surrounding environment. It is usually considered as an alternative device to air or water cooled chillers.

How is Chilled Water Produced?

This kind of water is pumped through chilled water piping and throughout the building where it will pass through a coil. The heat in the air is taken into the coils and then into the water.

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