Experimental study on the heat and mass transfer of Teflon-coated tubes for the latent heat recovery
SCIE
SCOPUS
- Title
- Experimental study on the heat and mass transfer of Teflon-coated tubes for the latent heat recovery
- Authors
- Lee, J; Kim, TJ; Kim, MH
- Date Issued
- 2005-03
- Publisher
- TAYLOR & FRANCIS INC
- Abstract
- The heat and mass transfer on stainless steel and Teflon-coated tube surfaces in a steam-air mixture flow were experimentally studied to obtain design data for a heat exchanger to be used in the latent heat recovery from flue gases. The test section consisted of three horizontal tubes with a pitch of 67 mm. The diameter of the tubes was 25.4 mm, and the tube wall thickness was 1.2 mm. The steam-air mixture flowed vertically from top to bottom.. The Teflon coating degraded the overall heat transfer coefficient by 19%, as compared to the bare stainless steel tube. The degradation of the overall heat transfer coefficient of the Teflon-coated tube comes from the additional heat transfer resistance due to Teflon coating. Its magnitude on heat transfer resistance is comparable to the in-tube heat transfer resistance. Nusselt and Sherwood numbers of Teflon-coated surfaces have a different trend compared to bare stainless steel surface in the higher Reynolds number of our test. The higher contact angle of the condensate on the Teflon-coated surface, about 25degrees, is the reason for the kind of trend observed.
- Keywords
- GAS
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/24801
- DOI
- 10.1080/01457630590897079
- ISSN
- 0145-7632
- Article Type
- Article
- Citation
- HEAT TRANSFER ENGINEERING, vol. 26, no. 2, page. 28 - 37, 2005-03
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- There are no files associated with this item.
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