Heat conduction process of integral finned tube
In order to reduce the thermal resistance on the airside and the bottleneck effect on the airside of the integral finned tube, various measures may be taken in the design of the heat exchanger. The method is to add fins on the outer surface of the airside, that is, use finned tubes. The finned tube expands the original heat transfer area on the airside, compensates for the low heat transfer coefficient on the air side, and greatly increases the heat transfer. The greater the temperature difference required for the transfer of unit heat of the finned tube, the greater its thermal resistance will become, and its thermal resistance is equal to the reciprocal of the heat transfer coefficient, indicating that the larger the overall finned tube heat transfer coefficient, the smaller its thermal resistance, On the contrary, the smaller the heat transfer coefficient, the greater the thermal resistance. The heat transfer coefficient of the airside of the fin tube is smaller than that of the waterside, so the thermal resistance of the airside is greater than that of the waterside, which becomes the main thermal resistance affecting the heat transfer of the whole fin tube, making the airside become the heat transfer coefficient. The bottleneck of the thermal process limits the increase in heat transfer.