Selection Method and Standard of Plate Heat Exchanger Pass(1)
Updated : 2021/01/08
The pass refers to a set of parallel flow channels in the same flow direction of a medium in the plate heat exchanger, and the flow channel refers to the medium flow channel composed of two adjacent plates in the plate heat exchanger. Generally, several flow channels are connected in parallel or in series to form different combinations of cold and hot medium channels

Plate heat exchanger pass form

The pass combination form should be calculated based on heat exchange and fluid resistance, and determined under the requirements of process conditions. Try to make the convective heat transfer coefficients in the cold and hot water channels equal or close to get the best heat transfer effect. Because when the convective heat transfer coefficient on both sides of the heat transfer surface is equal or close, the heat transfer coefficient will obtain a max value. Although the flow velocity between the plates of the plate heat exchanger is not equal, the average flow velocity is still used in the calculation of heat exchange and fluid resistance. Because the "U"-shaped single-flow pipes are fixed on the compression plate, it is convenient to disassemble and assemble.