Circumferential temperature distribution during nucleate pool boiling outside smooth and modified horizontal tubes |
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| Affiliation: | 1. Thermofluids, Complex Flows and Energy Group, Laboratoire de Thermocinétique, UMR CNRS 6607, Nantes University, La Chantrerie, BP 50609, F-44306 Nantes, France;2. Univ. Paris-Sud, LIMSI-CNRS UPR 3251, BP 133, 91403 Orsay Cedex, France;3. Univ. Paris Diderot, Sorbonne Paris Cité, Institut des Energies de Demain (IED)-CNRS-FRE 3597, Paris, France;1. KiJang Research Reactor Design & Construction Agency, Korea Atomic Energy Research Institute, 111 Daedeok-daero, 989Beon-gil, Yusong-gu, Daejeon 34057, South Korea;2. Research Reactor Engineering Division, Korea Atomic Energy Research Institute, 111 Daedeok-daero, 989Beon-gil, Yusong-gu, Daejeon 34057, South Korea;1. Kielce University of Technology, Faculty of Mechatronics and Machine Building, Division of Mechanical Engineering and Metrology, Aleja Tysiaclecia Panstwa Polskiego 7, 25-314 Kielce, Poland;2. Kielce University of Technology, Faculty of Management and Computer Modelling, Chair of Applied Informatics and Mathematics, Aleja Tysiaclecia Panstwa Polskiego 7, 25-314 Kielce, Poland |
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| Abstract: | In the work an approach to avoid a circumferential temperature distribution existing during nucleate pool boiling on a horizontal cylinder within low heat flux densities is presented. The idea of the approach is local heat transfer enhancement by a porous layer application on a part of the heating surface. An experiment on nucleate pool boiling heat transfer from horizontal cylinders to saturated R141b and water under atmospheric pressure is reported. Experiments have been conducted using stainless steel tubes with the outside diameter between 8 mm and 23 mm with the active length of 250 mm. The outside surface of the tubes was smooth or partially coated with a porous metallic layer. In particular, measurements of inside circumferential temperature distribution have been performed. |
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