Corrugated Tubular Heat Exchangers（波纹管式热交换器）.pdfVIP

Corrugated Tubular Heat Exchangers HEAT EXCHANGERS for the 21st CENTURY Heatex • Zwanenkade 146 • 2925 AV Krimpen aan den IJssel • Tel. 0180-55 16 88 • Fax. 0180-51 37 82 email: info@heatexchange.nl • www.heatexchange.nl Corrugated Tubular Heat Exchangers (CTHE) Corrugated Tube Heat Exchangers are shell and tube heat exchangers which use corrugated tubes instead of plain tubes. Development Corrugated Tubes take the best features of both the plain tube and the plate heat exchanger. Corrugated tube is produced by indenting a plain tube with a spiral pattern. • Plain tubes offer the best geometry to withstand pressure but the worst for heat transfer due to rapid build-up of boundary layer. • Plates in a plate heat exchanger induce local turbulence to increase heat transfer coefficient but is limiting in terms of operating pressures and temperatures due to elastomer gaskets. Also, the relatively narrow gap limits its use to fluids without large fibres and particulates. By choosing the depth, angle and width of the indentation carefully, the rate of decrease in boundary layer resistance can exceed the rate of increase in pressure loss. Types There are three types of corrugated tubes - HARD SOFT DIMPLED Heatex • Zwanenkade 146 • 2925 AV Krimpen aan den IJssel • Tel. 0180-55 16 88 • Fax. 0180-51 37 82 ema