On that situation, the channel side outlet nozzle will be on the read header. Increasing the number of tube passes increase the heat transfer co-efficient. To increase the fluid turbulence in the tube and shell side flow, turbulator and baffles are installed inside tubes and shells respectively. This increase the heat transfer between the fluids.
It is also typical to design X shell condensers with a flow area at the bottom of the tube bundle to allow free condensate flow to the exit nozzle. Careful attention to the effective removal of non-condensables is vital to X-shell constructions. Other Pages about Heat Exchangers. Part 1:Heat Transfer and types of Heat Exchangers. Post weld heat treatment of shell and tube heat exchanger Feb 06, 2019 · As per API 660 paragraph 9.6.9 a post weld heat treatment of fabricated carbon steel and low-alloy channels shall be performed for the following:A) Channels with six or more tube passes B) Channels whose nozzle to cylinder internal diameter ratios are greater than 0.5
Sep 25, 2005 · We are facing cracking at the three heat exchangers during the unit shutdown:First heat exchanger:material is carbon steel (1/2 Mo) cracking at the channel box to nozzles internal weld. Second heat exchanger:material is carbon steel (1/2 Mo) cracking at the channel MECHANICAL DESIGN OF HEAT EXCHANGERS
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