Heat transfer efficiency comparation between a plate heat exchanger and tube heat exchanger

- Jun 22, 2018-


Heat transfer efficiency comparation between a plate heat exchanger and tube heat exchanger.


Tube heat exchanger and plate heat exchanger are common types of heat exchangers. For the difference between the two, consumers may be most concerned about the difference in heat transfer, so here's a look at the two heat exchanger together. The comparison of thermal efficiency.


The cooling water in the tube/shell heat exchanger is laminar, so the flow velocity on the tube wall is zero, and the heat transfer is carried out by the heat transfer of the water (in addition, the flow of the cold side medium and the hot side medium becomes 900 without forming convection). For water/water coolers, the heat transfer coefficient K is generally 800-1200W/m2*K.

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In the plate heat exchanger, both the cooling water side and the cooled water side flow are turbulent, and the medium in the flow passage is continuously replaced in the center of the wall and the passage. In addition, the flow of the cold-side medium and the hot-side medium is 1800 to form convection, so the heat exchange efficiency is high. For water/water heat exchangers, the heat transfer coefficient K is typically 4000-7000 W/m2*K. This can save 4-5 times the heat transfer area.

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In addition, since the plate heat exchanger weighs only 20% of the shell-and-tube heat exchanger, it is quite easy to transport and install, and basically no equipment foundation is required. Therefore, more and more customers prefer plate coolers. However, it does not mean that there is no advantage for the tube type equipment. Two different coolers have their own application occasions, and they cannot be completely applied.