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The Difference Between Plate And Plate-Fin Heat Exchanger
bar plate heat exchanger is a heat exchanger which consists of plates and fins. While the original plate heat exchanger is a plate, the original heat exchanger is slightly different, and the plate heat exchanger includes the bar plate heat exchanger.
bar plate heat exchanger is mainly made up of plate beam and seal the top, there are a number of channels in the plate beam, in each layer placed between the two flat finned channel, and on both sides with seal seal. According to the flow mode of fluid flow, the interposition of the cold and hot fluid channel is placed, arranged and soldered into the whole, which is made into a beam.
Two fluid flow upstream, cross-flow and the fault current and so on, A and B fluid respectively assigned by the entrance to the head by A period of each of the deflector import of plate beam channel, then through another distribution of deflector guide to export head and derivation, two fluid countercurrent partition in heat transfer. The commonly used fins are flat, porous, serrated, and corrugated.
The main advantage of bar plate heat exchanger is:
High efficiency: because of the disturbance of the fins to the fluid, the boundary layer that forms the heat resistance is continuously updated, and the heat transfer coefficient is three times as much as the shell heat exchanger. And under the small temperature difference (1.5 ~ 2 ℃), hot (cold) recovery effect is good. It works best when the gas is heated.
Compact: because most of the heat is delivered through the tablet through the fin, the heat transfer area of the unit volume can reach 1, 500 m/m.
Light weight: the heat transfer area is about 1/5 the weight of the shell heat exchanger.
Strong: because the plate is a whole piece and the fin is supported by the two plates, it can withstand higher working pressure.
In addition, the bar plate heat exchanger can also achieve a variety of fluid flow and heat transfer in the same equipment, most of bar plate heat exchanger made of aluminum alloy, copper, stainless steel and titanium is also available. Because the aluminum has good low temperature performance, light weight, so the aluminum bar plate heat exchanger especially suitable for psa, ethylene and cryogenic equipment such as helium liquefaction, can also be used in power plant.
Aluminum bar plate heat exchanger are used for design pressure is less than 6.3 million mpa, the design temperature of + 6.3 million ~ 270 ℃. China, the United States, the United Kingdom and Japan are all producing bar plate heat exchangers. : is the development trend of bar plate heat exchanger fin accuracy and brazing quality, increase the varieties and specifications, strengthen the fin performance, many flow and phase change heat transfer in the cases of mechanism research, etc.