Heat exchanger gasket

[asvipin]

I have to design a U tube STHE. The pressure drop across pass partition plate is 0.5MPa. Can I design it without pass partition gasket. I am planning to provide an o ring at the periphery only. Tube side fluid is water with Temperature rise from 6 to 7 degree Celsius shell side it is air with temp drop from 150 to 10 degree celsius.

 

[Bokkel81]

I should use a pass partition gasket. You don't want any leakage over the pass partition plate otherwise the water is flowing from inlet straight to the outlet and will impact the performance of the STHE. Why not use a camprofile gasket with a web over the width of the pass partition plate?

 

[hardingjb]

I know you're requesting assistance in the gasket designs, but I'm curious why you decided to use an u-tube design (shell & tube) for air to water application? Most of the time you need more surface area on the air side to properly transfer energy from one boundary to another. Most of the applications use a circular fin-tubes on the outer surface of the tube when water is moving inside of the tube. And circular fin-tubes do not work very well within the shell to tube applications.

Back to designing your gasket when you say "Pass Partitions Gaskets" are you referring to water separators located in the header? And What is your operating pressure and test pressure?

Is the pressure drop on the water-side? 0.5MPa or 72 psi

Jack @ Thermal Transfer Technology, LLC (Florida)

 

[asvipin]

Process design is done by another person. I am only dealing with mechanical design.
Pass partition: The channel is partitioned into to two by a pass partition plate. My question whether gasket is required in between pass partition plate and tube sheet.
Pressure values
Shell side 0.5 bar test pressure 1 bar
Tube side(Water) 5 bar and test pressure 7.8 bar
Tube side pressure drop is correct only

 

[marty007]

Nobody can answer that except the person responsible for the process/thermal design. They have to know if they have to consider leakage, which could significantly impact their thermal design.

 

[hardingjb]

Gaskets are important to prevent wall erosion, if this occurs the heat-exchanger's thermal performance will be effective
on the water side. Therefore, the Lanier path on the waterside will be reduced.

http://www.ThermalTransferTechnology.com

 

[georgeverghese]

0.5MPa dp = 5bar dp, and you've got tubeside operating pressure of 5barg also.

That burns all of the available pressure on the water stream. How do you get 5bar dp on a single pass only in any case? What velocity are we running at on the tubeside for the water stream ?

Agree with your concern on tubeside interpass leakage at 5bar dp, but something more basic is wrong here.