Shell & Tube VS Plate type Heat Exchanger
Shell & Tube VS Plate type Heat Exchanger
(OP)
I don't have much experience on plate type heat exhanger. Other than it could be upgraded easily by adding plates, could anybody around have any working knowledge on its "main advantage" compared to the shell and tube heat exchanger? Maybe worth mentioning are cooling and heating effciency as one of the selection criteria, which I don't have reference document for comparison. Thanks
Eduard47
Eduard47





RE: Shell & Tube VS Plate type Heat Exchanger
Plate type HE's are the choice where complete disassembly is required for cleaning purposes (e.g. food industry).
Plate type HE's are definitely more efficient than shell and tube.
Shell & Tube HE's are the choice for most of the process industries (oil and gas, chemical, etc).
This is just a very basic approach.
Hope this helps.
a.
RE: Shell & Tube VS Plate type Heat Exchanger
Eduard
RE: Shell & Tube VS Plate type Heat Exchanger
rgrds
senno
RE: Shell & Tube VS Plate type Heat Exchanger
Both APV and ALfa Laval has produced an exellent catalog with lots of info and illustration. Search the web and request for a copy. If your lucky, they may even conduct a free presentation (lasted for 2 hours, snacks on them).
RE: Shell & Tube VS Plate type Heat Exchanger
RE: Shell & Tube VS Plate type Heat Exchanger
What no one is mentioning here is the thermal advantage that PHEs have over the ancient "shell & tube" units for certain types of duty.
When the approach temperature is very low, a PHE is a clear choice based on cost and performance. To size a shell & tube heat exhanger (STE) for this kind of duty, the exchanger becomes very large, costly or multiple shells must be used.
There is a penalty for PHEs in terms of pressure drop. Most STEs have a lower pressure drop (and pumping cost savings) for an equivalent thermal duty. This increased cost for pumping power (larger pump motors, more power demanded) can outweigh the cost savings of a cheaper PHE.
A third item to consider is fouling and clogging. Most SHEs can be pulled apart and cleaned cheaper than a PHE. Gaskets are cheaper also....
My opinion only !!!
MJC
RE: Shell & Tube VS Plate type Heat Exchanger
phe limit is the pressure since plate are thin and cover wide area.
For maintenance, shell and tube would normally require a hydro extractor to pullout if its going to be repaired or hydro jetted plus the added cost of blind and deblind (more opening than phe). Phe , work would entail only loosening the tie bar, slide the pressure plate and reppalce. chemical cleaning is breeze - only two CO noozle needs to be workout. Regasketting is a big time. for a fairly large phe, it cost us around $150,000 an amount that can buy u new s&t. Space (say u need 2 banks of exchanger)and ability to increase duty on the fly is one of its strong point.