4 replies to this topic

[zebmech]

Dear All,

 

We have an intersatge cooler with separator installed after the first discharge of Process Air Compressor in Ammonia Plant. Due to fouling and other unknown factors it efficiency is degrading. I am assigned a task to calculate its performace.

 

While studying its design sheet, I found that it's a finned tube heat exchanger with separator installed within it. I need your help in calculating its overall heat transfer coefficient. Also, suggest me how do I calculate the effective surface area of finned tubes.? Data available is as attached.

 

Regards,

zebmech

 

Attached Files

•  Finned tube heat exchanger.xls   20.5KB   1531 downloads
•  finned tube Heat Exchanger 1.pdf   944.57KB   1162 downloads
•  fiined tube Heat Exchanger 2.pdf   944.57KB   855 downloads

Edited by zebmech, 29 May 2013 - 05:10 AM.

[AlertO]

• Hi zebmech
• The best way that i recommend you is to use the thermal software i.e. HTRI giving you a reliable result. However, if you want to calculate manually i think you can try to calculate as the typical shell and tube. Finned tube just increase the surface area, but the fundamental should be the same (please wait for other guys who may have a better suggestion on this). you also want to calculate the effective area, but it seems that the data you have is lack of the finned detail such as no.of fin/meter and fin height. So,it's better if you can find the vendor's datasheet which usually has more details.
• In addition, i still doubt about the seperator that you mention. Can you show me how's it look like?

         Hope this can help you. Waiting for your more infomation or explaination.

[zebmech]

Dear devilchicken,

I am attaching images of the exchanger for your reference.

 

Regards,

zebmech

[Steve Hall]

The best online source for finned-tube exchangers is from Wolverine at http://www.wlv.com/p...-databooks.html

[srfish]

I agree with devilchicken that you need more fin details. The tubes do not the  typical fin tubes and that is not a typical heat exchanger. I suggest you go to the manufacturer (GEA) and get the fin tube information. Maybe they can help you with your calculations.