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Hollow Fibre Polymeric Heat Exchangers - 450 W/m2K
Fri Apr 12, 2019 | 11:27P | PermaLink BY: Max Page
www.frostytech.com

"It's a well-known fact that polymer's thermal conductivity is very low (a hundred times lower than metal's) and significantly limits heat transfer. Hollow fibres have a very thin wall (0.05-0.1 mm in thickness) so heat is transferred through the fibre wall effectively. Moreover, hollow fibre's small outer and inner diameter ensures superior convective heat transfer. The graphs show that convective heat transfer coefficients rise when the tube diameter decreases. Tests with hollow fibres confirmed high values of heat transfer coefficient: values up to 450 W/m2K were observed for liquid-to-gas and up to 2100 W/m2K for liquid-to-liquid applications, respectively."

FULL STORY @ HEATLAB
(http://www.heatlab.cz/research/polymeric-heat-exchangers-with-hollow-fibres)

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Time stamped: 3:06AM, 06.19.2019
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