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Selection of shell-and-tube heat exchangers

2009-02-24View Original

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In Version 3 of the \"Process Design Manual\", section 2-273, \"Selection of Shell and Tube Heat Exchangers\", there is a statement that reads: \"When condensing process fluids that contain inert gases, the outlet temperature of the coolant should be lower than the dew point of the process fluid, typically by 5°C.\" I have never designed a system of this type; how should this statement be understood? Is it the case that, since inert gases are designed to be discharged from the system, the process materials must be condensed into a liquid state to prevent them from being lost along with the inert gases; generally, the outlet temperature of the coolant should be 5°C lower than the dew point of the materials? Please provide some guidance. Thank you!

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