Polymeric Hollow‐Fiber Bundles as Immersed Heat Exchangers |
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| Authors: | Klarissa Weiß Ilya Astrouski Marcus Reppich Miroslav Raudenský |
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| Affiliation: | 1. Efficient Energy GmbH, Feldkirchen, Germany;2. Brno University of Technology, Faculty of Mechanical Engineering, Heat Transfer and Fluid Flow Laboratory, Brno, Czech Republic;3. Augsburg University of Applied Sciences, Faculty of Mechanical and 4. Process Engineering, Augsburg, Germany |
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| Abstract: | Plastic immersed heat exchangers are used in various applications where chemically neutral and noncorrosive equipment is required. Their potential competitors, namely, polymeric hollow‐fiber bundles, were investigated. Three different fiber bundles were tested as immersed coolers of a hot reservoir. Two types of polypropylene hollow fibers with various outside diameters were employed. Fibers were twisted with different curvature to achieve better distribution and improve natural convection on their outer surface. Calculation by experimental results was compared with the equation for natural convection across the horizontal cylinder, which overestimates heat transfer coefficients and can be applied for only rough estimation. Experimentally achieved pressure drops agreed well with theoretical prediction for laminar flow. |
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| Keywords: | Hollow fibers Natural convection Overall heat transfer coefficient Polymeric heat exchangers |
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