How to choose the most suitable Alfa Laval plate heat exchanger under the condition of small logarithmic mean temperature difference? So before we answer that question what is logarithmic mean temperature difference? To put it simply, the logarithmic mean temperature difference is the mean temperature difference in heat transfer between the two sides of the heat exchanger plate, also known as the mean driving force.

The driving force is the power of the heat transfer, it is conceivable that the smaller the power, require a greater heat transfer area, but if by increasing the number of plate of blindly to increase the area is not very economic, so must want to Qingdao Ruipute that increase the K value, is also the plate of the integrated heat transfer coefficient, so we must choose efficient heat transfer plate type.

Small temperature difference conditions are usually used in refrigeration conditions, such as air conditioning, interlayer cooling, ice storage, natural cooling, regional cooling, and so on.The smaller the logarithmic mean temperature difference is, the more difficult the heat transfer is, so we need a plate with better heat transfer efficiency to participate in the heat transfer. In order to respond to the market needs and customers' demands, Qingdao Ruipute has increased its investment and developed a lot of rich plates covering most of the application conditions.
According to the engineers of Qingdao Ruipute, the plate with larger heat length value is needed for heat transfer with small temperature difference, so as to achieve efficient heat transfer. The so-called heat length is the time that the medium stays in the heat exchanger. The longer the time, the greater the "heat length value" and the more sufficient the heat transfer. So how do we figure out the heat length?
Firstly, increasing the heat length requires increasing the aspect ratio of the plates. If the height is not enough, multiple processes should be used or larger plates should be used to exchange heat. Second, when the height is the same, the heat length value will be changed by changing the Angle of herringbone ripple. The greater the Angle, the greater the resistance and the more sufficient the heat transfer. Thirdly, when the plates are of the same size, the heat length value can be changed by adjusting the depth of the groove of the ripples. The shallower the ripple, the more heat is exchanged but the worse the circulation. Conversely, the deeper the ripple, the worse the heat transfer effect, but the stronger the circulation capacity.
Officially aware of these points, Qingdao Ruipute has set up a team of engineers with more than 20 years of experience in heat exchange, constantly integrating the potential of Alfa Laval plate heat exchanger, etc., and developed a small temperature difference heat exchanger with higher heat exchange efficiency and more economical and practical, which has won praise from customers in the market.