According to the heat transfer mode of the heat exchanger, the heat exchanger can be divided into three categories:
Direct contact heat exchangers, also known as hybrid heat exchangers, are devices in which hot and cold fluids are in direct contact and heat exchange. Typically, the two fluids in direct contact are gases and liquids with lower vaporization pressures;
The working principle of the energy storage heat exchanger is to utilize the heat conduction characteristics of the solid matter. Specifically, the heat medium first heats the solid matter to a certain temperature, and the cold medium obtains heat from the solid matter, and the heat transfer can be realized through the process. ;
The inter-wall heat exchanger also utilizes the heat transfer of the medium. The cold and hot media are separated by the solid partition and exchange heat through the partition. For heating companies, the partition wall heat exchanger is the most widely used. Depending on the structure, it can also be divided into tubular heat exchangers, plate heat exchangers and heat pipe heat exchangers.
Shell-and-tube heat exchangers are also known as tube-and-tube heat exchangers. The partition wall heat exchanger is a heat transfer surface which is closed on the wall surface of the tube bundle in the casing. The heat exchanger has a simple structure and reliable operation, can be manufactured by various structural materials (mainly metal materials), can be used under high temperature and high pressure, and is the most widely used type at present.
According to the compensation measures adopted, the shell-and-tube heat exchanger can be divided into four types: fixed tube plate heat exchanger, floating head heat exchanger, U-tube heat exchanger and stuffing heat exchanger.
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