The plate-fin heat exchanger is a more efficient, compact and lightweight heat exchanger. In the past, due to high manufacturing costs, it was only used in a few sectors such as aerospace, electronics, and atomic energy. It has been gradually used in petrochemical and other industrial sectors. The plate-fin heat exchanger has many structural forms, but the basic components are the same, that is, between two parallel thin metal plates, corrugated or other shapes of metal fins are added to seal the two sides, which becomes a heat exchange. Basic components.
High heat transfer efficiency and good temperature control.
The fins are thin, compact and small.
The fins have both heat transfer surfaces and support, and the strength is high.
The flow path is small, easy to block, and difficult to clean.
The separator and the fins are very thin, and the medium is required to not corrode the aluminum. If it is corroded, it causes internal leakage and is difficult to repair.
The structure is complicated, which makes the design more difficult.
The jacketed heat exchanger is formed by installing a jacket on the outer wall of the container, and a space formed between the jacket and the container serves as a passage for the heating medium or the cooling medium. However, the heating surface is limited by the wall surface of the container, and the heat transfer coefficient is not high. In order to increase the heat transfer coefficient and to make the liquid in the container uniform, a stirrer can be installed in the container. When the cooling water or the phase change-free heating agent is introduced into the jacket, a spiral partition or other measures for increasing the turbulence may be provided in the jacket to increase the heat supply coefficient on one side of the jacket.
Advantages: simple structure and convenient processing.
Disadvantages: small heat transfer area and low heat transfer efficiency.
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