Jim Grant Forum Moderator 119 Posts
Re: How do you calculate heat transfer with corrugated stainless steel tubing?25 January 2012 at 1:29pm
The corrugations provide an enhancement to the inside film coefficient and there are several papers which cover this, including experimental data. Consider the following:
J.G. Withers (1980) publications in "Heat Transfer Engineering" Vol 2 No.1 pp 48-58 and No.2 pp 43-50
H. M. Li, et al (1982) publication in "Proceedings 7th International Heat Transfer Conference" Munich, Vol 3 pp 75-80
R. Sethumadhavan & R Rao, (1986) Journal Heat Transfer Vol 108 pp 55-61.
I am considering using a CSST (corrugated stainless steel tubing) product as a coiled heat exchanger in a cylindrical vat. The expected operating temperatures and pressures of the system are within the operating parameters of CSST. Do you have any experience with this type of product and/or do you see any issues with such? What would be the best method of calculating the expected heat transfer (per foot)? My shell-side temperature (I/O) is roughly 13.5 degrees F at 23 GPM and I'm looking to increase my tube side by roughly 20 degrees F at 15.5 GPM. ¾" CCST wall thickness .010" ID .808"-.832" Mean .820" OD 1.028"-1.062" Mean 1.040" corrugations per/ft 58-62. Any assistance you are willing to provide is greatly appreciated.
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