Cooling coils are used to control temperatures in material processing and heating/cooling systems. Heat exchange occurs as materials move through the coil, with longer coils promoting more heat loss. Coils can be actively pumped or use density differences to circulate materials. Maintenance is important to prevent reduced circulation and leaks.
A cooling coil is a device intended to allow the contents of the coil to cool as they move through it. Cooling coils can be used in material processing to control the temperatures of various components and are also employed in heating and cooling systems where space is limited and other cooling arrangements are not possible. This cooling mechanism is relatively simple and can usually be implemented at a reasonably low cost.
As materials move through a cooling coil, heat exchange occurs. The heat is dispersed through the surface of the coil, making the contents cooler. The amount of heat lost depends on the length of the battery; just as people try to keep hot water pipes short to prevent heat loss between the water heater and the final source, people can make extremely long cooling coils to promote heat loss. The coiled design allows for a large surface area for heat exchange in a relatively small space, as the tube does not need to be stretched.
Depending on how a system is designed, materials may be actively pumped through a cooling coil or the system may leverage the design of the coil to push materials through. In a pressurized system, density differences between cold and hot materials drive the circulation of materials through the cooling coil, maintaining a constant flow. The temperature never fully stabilizes, as hot new materials always enter at one end while cooled materials exit at the other.
People can use a series of cooling coils to make a space colder even faster. Coils can also be wrapped around components that need to be kept refrigerated. These components are placed in the area of the battery where the right temperature is reached, and the material inside the battery circulates freely to provide cooling.
Proper maintenance of cooling coils is critical. They can get dirty over time, reducing total circulation and making it more difficult to reach the desired temperature. Corrosion can also become a problem, as it can corrode the coil and create a leak. Many substances used as coolants within cooling coils are toxic and can pose a health hazard if inadvertently released. Other concerns can include wear around joint sites, creating a leak in a cooling coil, as well as a potential reduction in pressure within the cooling system which could prevent it from functioning properly.
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