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Design principle and purpose of finned industrial heat exchanger
May 26, 2018

With the rapid development of society and the popularization of central air-conditioning in large buildings, people have focused their attention on the development of fin-type industrial heat exchangers. As a widely used heat exchanger in the field of refrigeration and air conditioning, the focus is to To study how to improve it, this can be achieved by targeted improvement of the design type of the finned industrial heat exchanger and its overall performance.


In the central air-conditioning unit, the finned industrial heat exchanger has never existed independently. It has an important role to play and is important for the development of the entire HVAC industry. Due to the differences in fin structure and geometry between the finned industrial heat exchangers, the heat transfer performance and resistance performance are greatly different.


Therefore, it is only necessary to adjust the fin spacing of the industrial heat exchanger to design a variable fin pitch to achieve structural optimization, and to compare the heat transfer performance with the improved front heat exchanger, thereby improving the heat transfer of the heat exchanger. coefficient. Through the improvement of the fin pitch structure of the fin-type heat exchanger, the cooling fan can maintain high heat transfer performance under frosting conditions under the premise of constant dimensions, ie height, width, and total tube length. coefficient.


The heat transfer coefficient of the cooling fan with the variable fin pitch structure is 9.8% higher than that of the fin pitch structure, and the heat transfer area is increased. The heat transfer coefficient and the heat transfer area are increased to achieve the heat transfer enhancement. The purpose is to make the heat exchange effect of industrial heat exchangers more ideal.


On the premise of not increasing the overall equipment size, by increasing the surface heat exchange area of the fin type industrial heat exchanger and strengthening the disturbance of the fluid in the pipe, the variable pitch internal thread is processed on the inner wall of the original heat exchanger. When the heat transfer coefficient of the working medium in the pipe is larger and the heat transfer coefficient of the working medium outside the pipe is smaller, the convective heat transfer resistance outside the pipe will become the main resistance to heat transfer. The use of an extended surface plays an important role in reducing the volume of the heat exchanger and improving the efficiency of the heat exchanger.

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