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The vacuum condenser is for the petrochemical industry and process fluid is mostly styrene and not steam. We use HTRI to rate shell and tube HXs but at these low pressures, the software is not reliable. On their website Graham states that below 50 torrs commerical software is not reliable...

Sorry for double posting....And I saw ur reply....see my reply to your reply Thanks for the help

Surface condenser.... We need someone to rate the HXs and frabricate them. Commerical software are not reliable for these low pressures.... pressures as low as 0.15 kpa abs

Anyone have any ideas besides our friends from Graham??

Anyone know of any other vacuum condenser vendors besides Graham?? Thanks

I can get a density for carbon steel but wanted a database for other properties if i needed them down the road and I google all the time........ :)

Anyone know of any "free" websites where i can get the density of SA-106, Grade B? Thanks

I am using HTRI and would like some recommendations for good tube and shell velocities for liquids and gases. Right now i am using 0.75 inches for the tubes with liquid in both the shell and tube. However, my tube velocity is 0.02 m/s. I read that 1-3 m/s (3-10ft/s) are good velocity numbers in...

thank you all for the replies. Where is my Gumbo???

If i am given the surface area of a shell and tube HX, does it mean total tube surface area or does is also include inside shell surface area.

Thanks imok2

Can anyone explain to me the difference between an oil recovery system using an eductor (hot gas driven) vs an oil distiller? I am not really an HVAC guy but involved in a chiller assigment. Am I right in assuming that the eductor system will boil off any refrigerant in the mixture? thanks

thanks for the replies.

From a fabrication point of view what is the maximum number of tubes passes for a given shell ID. I have an 8 tube pass BEU HX and the shell ID is 21 inches. I wanted to know if this is possible and if anyone has any guidelines for this. For example, no more than Y tube passes for a shell...

Hello All, I would like to know if reaming is essential. Our specification calls for reaming. The vendor stated that their high quality machining equipment produces a hole finish of "125 to 250 ARH, which ordinarily exceeds requirements." If we wanted reaming it would be at a price but didnt...

How do u determine the nozzle sizes for a shell and tube HX? What equation is used?

Hello- I would like to know if anyone can suggest some good books to learn more about the design considerations involved in fired heaters for the petrochemical and refinery industry. I already found a good website (http://www.heaterdesign.com/design5.htm) and would like to buy a book that...

Anyone know what is the salary range for an entry level/junior Mechanical Engineer in the Toronto area? Or any other area in CANADA....

Three methods I can think of--- 1) Heisler Charts : From what I remember from undergrad it usually dealt with convective Boundary conditions. I am sure it can be used for fixed temperature BCs 2) derive the exact solution : Will involve separation of variables and some math example d^2T/dx^2...