The plate heat exchanger consists of a set of metal corrugated plates with holes in the plates for the heat exchange medium to pass. The metal sheets are mounted in a frame and clamped by clamping studs. The hot and cold plates are 180 degrees upside down when installed, forming a flow path. A gasket is placed on the plate to direct the liquid to the flow path of each of the groups to prevent mixing of different media.
The plate heat exchanger passes refers to a set of parallel flow channels in the same flow direction of a medium in a plate heat exchanger, and the flow path refers to a medium flow channel formed by two adjacent plates in a plate heat exchanger. In general, several flow passages are connected in parallel or in series to form different combinations of cold and hot medium passages.
The passes and plate arrangment should be calculated based on heat transfer and fluid resistance and determined to meet process conditions. Try to make the convective heat transfer coefficient in the cold and hot water flow channels equal or close, so as to get the best heat transfer effect. The heat transfer coefficient obtains a larger value because the convective heat transfer coefficients on both sides of the heat transfer surface are equal or close. Although the flow rates between the plates of the plate heat exchanger are not equal, the calculation is based on the average flow rate in the calculation of heat transfer and fluid resistance. Since the "U"-shaped single-flow nozzle is fixed on the pressing plate, the disassembly and assembly is convenient.