tube bundles
tube bundles
(OP)
Hi everybody,
hope somebody could help me.
I am designing an heat exchanger composed by bare tubes, and I'd need to find a reference formula for heat transfer and pressure drop.
I am reconnecting to following thread
thread378-170854: Tube bundle (Pressure drop and heat transfer)
I have the possibility to
Heat Transfer - J.P. Holman
nevertheless I cannot find any reference to this topic.
Please, could anybody of you tell me if this issue is present in the most recent versions ?
Could anybody of you give me some other literature or web references ?
Many thanks
hope somebody could help me.
I am designing an heat exchanger composed by bare tubes, and I'd need to find a reference formula for heat transfer and pressure drop.
I am reconnecting to following thread
thread378-170854: Tube bundle (Pressure drop and heat transfer)
I have the possibility to
Heat Transfer - J.P. Holman
nevertheless I cannot find any reference to this topic.
Please, could anybody of you tell me if this issue is present in the most recent versions ?
Could anybody of you give me some other literature or web references ?
Many thanks





RE: tube bundles
It seems a bit naive your request for help in the design of heat exchangers. This type of the equipment requires highly specialized engineering knowledge, experience, to not mention the software at the cost of tens of thousands of dollars. The thermal design and the mechanical design of a heat exchanger is the product of several competent engineers hard work, at the cost of many thousand of dollars. You might as well ask for help to build a rocket, to have a short trip to the Moon.
However, if you know what type of shell and tube heat exchanger you need, if you know the both process fluid properties, flow, pressure, temperature data, plus many other details at a later stage, them we might be able to guide you step by step in your endeavour.
Cheers.
gr2vessels
RE: tube bundles
Mike Halloran
Pembroke Pines, FL, USA
RE: tube bundles
RE: tube bundles
Just some clarifications:
to Mr.gr2vessels
in my opinion, even a rocket has to be designed considering element by element.
In shorts:
there is a bank of tubes.
I have to realize a calculation of an heat transfer coefficient.
Internal side convective coefficient and pressure drop are known.
I need to know external convective coefficient.
Therefore I need a correlation to calculate it.
according to the quoted thread it would be present in J.P. Holman book, but I am not able to find any evidence.
Therefore, I kindly ask if somebody of you knows some correlations or could recommend me some literature reference.
I don't think that this request is so different from the others I can read in the forum
that's the basis of my thread.
to Mr.TBP
Unfortunately at the moment I am not able to realize any practical experimentation, but I'd need to realize a theoretical one.
Many thanks
RE: tube bundles
With no disrespect meant, for you to have the task that you have before you and to have to ask the questions that you are asking, you are way out of your league.
Hx design is not just one correlation, but many, and even the "rocket scientists" of the Hx world have to work hard to get it right.
Sorry, but JP Holman isn't even close. I design Hx's as part of my day job and my JP Holman usually just gathers dust on the shelf.
I recommend that you get an expert or consult with some possible vendors of this type equipment. Give them your requirements and let them do the sizing for you and than analyze their choices with what you can find in JP Holman.
rmw
RE: tube bundles
With all due respect to the detailed designers of specialized equipment, sometimes "the rest of us" just have to take the plunge and take a shot at something, due to a myriad of constraints and reasons.
After all, for everything, I knew nothing about anything the first time I tried something.
Regards,
SNORGY.
RE: tube bundles
This is one such book, available for free on the web:
http://web.mit.edu/lienhard/www/ahtt.html
I use Thomas: "Heat Transfer - Professional Version" and Kreith: "Principles of Heat Transfer. In both books, I recommend reading Chapter 11.
But frankly AO1958 and SNORGY, it's not an easy subject and not one where you can really expect people who do it for a living to do it for you for free.
Patricia Lougheed
Please see FAQ731-376: Eng-Tips.com Forum Policies: Eng-Tips.com Forum Policies for tips on how to make the best use of the Eng-Tips Forums.
RE: tube bundles
I'd call a couple of HX manufacturers, give them the background info, and let THEM do the heavy lifting on the design-end.
RE: tube bundles
However, in reading my post I don't think there was any suggestion of expecting a specialist or consultant to perform a complex design for anyone for free. My message, in point of fact, was quite to the contrary. It simply stated that, in the absence of better resources, if one needs to do it on one's own, Kearns is a good resource, and that further, there is a first time for everything for everybody.
Regards,
SNORGY.
RE: tube bundles
You can find method in Perry's Ch.Engineer Handbook or wolverine tube mfr. site downloading wolverine book.
If concerns one application you can send me the process data and heat exchanger geometry for proceeding to the calculation.