![]() The refrigerant then goes through the expansion valve (as before) and returns to the evaporator.Ĭhillers have several uses and are sometimes preferred over traditional split systems or package units because the water conducts heat better than air. Here, fans circulate outside air through the condenser, which absorbs heat from the refrigerant (again, the second law of thermodynamics dictates that hot moves to cold) before expelling this heat to the ambient air. The refrigerant moves through the compressor to raise the pressure and temperature, and then it reaches the condenser. Heat is transferred in the evaporator to the refrigerant, and the water runs through the primary supply to the cooled space. Like with water-cooled chillers, the process begins with the primary return bringing warm water to the chiller. After condensing, the refrigerant goes through an expansion valve to reduce pressure (and temperature) before returning to the evaporator, where the process begins again. The water is then pumped into a cooling tower to release the heat. Water-cooled chillers use water to surround the refrigerant pipes and draw in the heat (path shown in red). The low-pressure, high-temperature refrigerant moves from the evaporator to the motor-run compressor, which increases the pressure and temperature.Īfter that, the refrigerant enters the condenser. In the meantime, the heat absorbed by the refrigerant (path shown in green) in the evaporator needs to be transferred to allow the refrigerant to absorb more heat. The warmer water is then returned to the chiller to be cooled once again. A fan then forces the cooled air into the space via the ductwork. Because heat always moves from hot to cold as stated by the second law of thermodynamics, the chilled water absorbs the conditioned space’s ambient heat in the air handler. The now-chilled water is then sent to the water tank via the primary supply (shown in blue), where it is distributed to the various climate-controlled spaces by the water pump. The cooling process begins when water enters the evaporator from the primary return where heat is transferred from the water to the refrigerant. They work similarly throughout most of the process until the refrigerant reaches the condenser, and both are outlined in the following sections. There are two types of chillers: water-cooled and air-cooled. If you’re not familiar with this complicated cooling equipment and you’re working on a claim that includes one, you’ll want to know the basics.Ĭhillers transfer heat away from a space that requires climate control much like a traditional split system or package unit does, but they use water (or a water solution) to do so instead of air. These systems are often intricate and specialized based on the space or equipment they’re cooling, meaning they present their own challenges to insurance adjusters like you. ![]() When a damaged chiller claim lands on your desk, you need to be ready for the complexities that come with it.
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