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What effect does the angle of the plate heat exchanger have on the heat transfer effect
Release time:
2022-07-28
The main method to increase the k-value of the plate heat exchanger is to increase the degree of fluid disturbance on the surface of the heat transfer medium on both sides of the plate. Plate heat exchanger plates are usually processed as herringbone corrugated plates. For the herringbone corrugated plate, the size of the herringbone angle on the heat transfer and fluid resistance has a great impact. Herringbone angle of the plate high heat transfer coefficient, fluid resistance is also large; conversely, the herringbone angle of the small plate heat transfer coefficient and resistance are low.
Herringbone angle of the corrugated heat transfer is good, the smaller the angle or become larger, the heat transfer efficiency will become lower, usually the cooler and cylinder liner water cooler using 120 ° herringbone angle plate, in order to achieve good heat transfer.
In the lubricating oil cooler, because the viscosity of lubricating oil is higher than the viscosity of water, if all use 120 ° large angle plate will cause a large fluid resistance, and 60 ° small angle plate heat transfer coefficient is low. Therefore, the oil cooler often uses 2 types of plates in a mixed way.
Each plate size, with at least two plate types, uses thermal mixing technology, which allows the combined heat transfer and pressure drop of the plate heat exchanger to operate at its operating point. Internal bypass, dual flow path technology and unequal flow cross-sectional area assembly provide solutions for operating conditions with large differences in media flow between the two sides. Different models are available in deep corrugation, shallow corrugation, large angle, small angle, etc.
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