Influence of the angle between plates of marine heat exchanger on heat transfer
One of the main ways to improve the K value of marine plate heat exchanger is to increase the degree of fluid disturbance on the surface of heat exchanger on both sides of the plate. The plate of marine plate heat exchanger is usually processed into corrugated plate. For Herringbone corrugated plate, the size of herringbone angle has great influence on heat transfer and fluid resistance. The heat transfer coefficient and fluid resistance of the plate with large herringbone angle are higher than that of the plate with small herringbone angle. The results show that 120 ° herringbone angle has the best heat transfer effect, and the smaller or larger the angle, the lower the heat transfer efficiency, so as to achieve the maximum heat transfer effect.
In marine lubricating oil cooler, because the viscosity of oil is higher than that of water, making full use of the plate with large angle of 120 degrees will produce greater fluid resistance, and the heat transfer coefficient of 60 degree small angle plate is lower. Therefore, two kinds of plate mixing methods are often used in marine oil cooler. Under the condition of making full use of the allowable pressure drop, this is called heat transfer hybrid design, and the heat transfer area can achieve the best effect. Each specification of reed has at least two plate types. The heat transfer and pressure drop of marine heat exchanger can be integrated by heat mixing technology to make it operate at the best operating point. Internal bypass, dual channel technology and unequal flow cross section components provide perfect solutions for large flow conditions on both sides of the medium.
There are more than 100 kinds of marine heat exchangers, such as AB series, am series, Al series, AP Series, series series and more than 100 kinds of plates. Various models include deep ripple, shallow ripple, large angle, small angle, etc. The requirements of different users are fully guaranteed. Special working conditions can be designed and manufactured according to the needs of users.