This article explains the calculation and analysis method of dry and wet tube fin heat exchangers; and uses the tube row size and operating conditions actually used by a panel factory to calculate and compare the performance of oval tube rows and circular tube rows under the same windward surface area. , designed to replace the original circular tube row with an elliptical tube row. According to the calculation model analysis results of this study, under the same water flow rate in the pipe and air volume outside the pipe, replacing the round pipe with an oval pipe with the same circumference can reduce the air side pressure loss by about 31%, but the ice water side pressure loss in the pipe It will be doubled, and the heat transfer rate is increased by about 5% compared to the circular tube; if the original circular tube with an outer diameter of 12.7mm is replaced by an oval tube with a slightly larger circumference (long axis 20.15mm, short axis 8.5mm) shaped tube, the fin spacing is changed from 2.5mm to 2.92mm, the air side pressure loss can be reduced by approximately 35%, the ice water side pressure loss in the tube can be reduced by approximately 4%, and the heat transfer capacity can be increased by approximately 6%. The original operating conditions of the air conditioning system can be maintained and the heat exchanger can be directly replaced to achieve energy saving effects of reducing air side pressure loss and windmill energy consumption.
Keywords: fin heat exchanger, air conditioning system, energy saving
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