Investigations of pulsed heat loads on a forced flow supercritical helium loop: Part B: Simulation of the cryogenic circuit |
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| Authors: | R. Vallcorba D. Hitz B. Rousset B. Lagier C. Hoa |
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| Affiliation: | 1. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China;2. Science Island Branch of Graduate School, University of Science and Technology of China, Hefei 230029, China;1. College of Materials Science and Engineering, Hunan University, Changsha 410082, China;2. Hunan Institute of Engineering, Xiangtan 411104, China;1. Centre Spatial de Liège (CSL), Université de Liège Avenue du Pré-Aily, B-4031 Angleur, Belgium;2. F4E Broader Fusion Development Dept., Boltzmannstr. 2, D-85748 Garching, Germany;3. SCK/CEN, Boeretang 200 2400 Mol, Belgium;4. CEA/DSM/IRFU CEA-Saclay, F-91191 Gif-sur-Yvette Cedex, France;5. Ateliers de la Meuse (ALM), Rue Ernest Solvay, 107, B-4000 Sclessin, Belgium;1. ITER Organization, Route de Vinon sur Verdon, 13115 St Paul Lez Durance, France;2. National Institute for Fusion Science, Toki, Gifu 509-5292, Japan |
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| Abstract: | The VINCENTA software is applied to model the transient thermal–hydraulic flow of the HELIOS supercritical helium circuit. This cryogenic circuit is equipped with dedicated heating to simulate pulsed heat loads – See Part A for the description of the experimental set up. Currently, one of the main important problems to be solved is the control and smoothing of heat pulses in the cryogenic circuit to keep the refrigerator in stable operation. In this context, the aim of the present development is to get a predictive model for the experimental management of overall heat loads absorbed by the refrigerator as well as to better understand the associated physical phenomena. This preliminary model is validated with early experiments performed with the HELIOS test facility which is dedicated to simulate representative pulsed loads related to the Japanese tokamak JT60-SA. This article presents the first comparison between model and experiments for two JT60-SA relevant scaled down pulses: (20 s/600 s–1000 W) and (60 s/1800 s–750 W). |
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