Installation of Coiled Pipe Cooling Device and Calculation of Heat Exchange Area for the Technical Water Supply of Pumping Station
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Abstract:
According to the engineering characteristics of the pump station, the closed circulating water supply system composed of the coiled pipe cooling device which was installed in natural water for cooling is an energy-saving and reliable technical water supply mode. The heat transfer principle of the coiled pipe cooler was analyzed using the heat transfer theory, and the calculation formulas of heat exchange area of coiled pipe cooler under different installation forms were proposed. The results showed that (1) when the coiled pipe cooler is in static water with natural convection heat transfer and water capacity is used to carry away heat, the heat exchange area of the coiled pipe cooler is the largest; (2) when the coiled pipe cooler is in flowing water with forced convection heat transfer and water flow is used to carry away heat, the heat exchange area of the coiled pipe cooler is the lower; (3) increasing of the pipe internal thermal fluid or the flow rate of cooling water outside of the pipe can reduce the heat transfer area, but it increases the pipeline installation requirements and operation cost; and (4) the stainless steel material is recommended for the coil material in order to save the investment and prolong the service life.
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