Brazed plate type heater is an evolution of the detachable heat exchanger. The sealing material is changed from rubber pad to copper or nickel. All the plates are bonded together by copper or nickel solder.
Selection of process
The flow 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. In general, a number of channels are connected in parallel or series to form different combinations of cold and hot media channels.
The process combination form should be calculated according to transfer ratio 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, so as to get the best heat transfer effect. Because when the convection heat transfer coefficients on both sides of the heat transfer surface are equal or close to each other, the heat transfer coefficient gets a larger value.
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