It also has disadvantages. The brazed heat exchanger cannot be disassembled and cleaned, it cannot be repaired, and the price is slightly higher. Brazed plate heat exchangers can choose different process combinations based on different parameters to increase the heat transfer efficiency of the brazed plate heat exchangers.
It also has no sealing rubber pad. The plate is made of copper foil melting and welding at high temperature. The plate has a herringbone corrugated design, which enables the fluid to achieve turbulence at low flow rates. Mainly used in high temperature and high pressure, rubber pad can not adapt to the working conditions. It also has disadvantages, it cannot be disassembled for cleaning, it cannot be repaired, and the price is slightly higher. Brazed plate heat exchangers can choose different process combinations based on different parameters to increase the heat transfer efficiency of the brazed plate heat exchangers.
The flow of the fluid between the plates can be combined according to the specific use situation. Generally, there are a combination of a single flow and multiple flows. For example, if the media on both sides are uniform in a single process, the media on one side may be a single process and the media on the other side may be a dual process, or the media on both sides may be different multi-process combinations. Its standard combination is that the hot and cold sides are single processes, and multi-process heat exchangers can be customized according to customer requirements.
The combination of processes should be calculated based on heat exchange and fluid resistance, and try to make the convective heat transfer coefficients in the cold and hot water flow channels equal or close, so as to have good heat transfer. Because the convective heat transfer coefficients on both sides of the heat transfer surface are equal or close, the heat transfer coefficient gets a larger value.
Although the flow velocity between the plates of the plate heat exchanger varies, the average flow velocity is still used in the calculation of heat exchange and fluid resistance. Since the "U" shaped single-pass nozzles are fixed on the pressure plate, it is easy to disassemble.
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