Air-cooled heat exchanger features

- Jan 08, 2018 -

Air-cooled heat exchangers consist of a number of different series of products, some of which are made of aluminum plate-fin heat exchangers that are compact, highly efficient heat exchangers and operate less often. And is manufactured with advanced vacuum brazing process, air-cooled heat exchangers have become the new generation of products that are increasingly being selected by customers.

 

The working principle of the air-cooled heat exchanger can be summarized as follows: the heat released by the cooling and condensing of the refrigerant is taken away by the air so that the refrigerant is gradually cooled during the flow in the tube and condensed until finally becomes the supercooled liquid. Under normal circumstances, which used in the heat pipe is the use of copper. With the fan's force, the air will sweep across the tube laterally, removing heat and dissipating into the surrounding environment. In order to further enhance the heat transfer on the air side, external fins are often applied to increase the heat transfer area.

 

Compared with other types of heat exchangers, air-cooled heat exchanger is not the most important feature of water. Therefore, the device can be applied to dry areas and freon systems. However, the device is susceptible to ambient temperature during operation. For example, when the temperature is higher in summer, the condensing pressure will be very high. When the temperature in winter is low, certain measures must be taken to prevent the condensing pressure from being too low, which may cause insufficient supply of the evaporator.

 

So far, the air-cooled heat exchanger is mainly used in various air-conditioning systems, of which the typical structure is a fin tube heat exchanger. During the cooling process, the high-pressure gas discharged by the compressor enters the header of the left and right heat exchangers in two paths respectively, and then enters each of the base tubes, and then flows out of the distributor after being condensed.

 

Based on the above analysis, in fact, air-cooled heat exchanger is based on air as a cooling medium, by virtue of the air temperature rise away condensation heat. Therefore, this air-cooled heat exchanger has obvious advantages for applications where water is extremely scarce or unavailable. Due to different air flow patterns, it can be divided into natural convection and forced convection.

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