Melt path formation in a high temperature molten salt horizontal shell and tube storage system for CSP plants
Date
2020
Authors
Riahi, S.
Liu, M.
Jacob, R.
Belusko, M.
Bruno, F.
Editors
Richter, C.
Advisors
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Conference paper
Citation
AIP Conference Proceedings, 2020 / Richter, C. (ed./s), vol.2303, iss.190026, pp.1-5
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Conference Name
SolarPACES 2019: International Conference on Concentrating Solar Power and Chemical Energy Systems (1 Oct 2019 - 4 Oct 2019 : Daegu, South Korea)
Abstract
Latent heat thermal energy storage systems working at higher temperatures around 800 °C are considered as a promising alternative in conjunction with the sCO2 Brayton cycle for the next generation of concentrating solar power plants. At higher temperatures, a detailed thermo-mechanical analysis of the system is crucial, particularly during a melting/charging process with a high temperature difference (50-100 K) between the solid phase change material (PCM) and heat transfer fluid. Here, the melt path formation of a high temperature PCM in a horizontal shell and tube system is investigated. Three different levels of modelling were conducted. The results of the study showed that the melted PCM around the tubes connect and form a path after about 50 seconds, which provides a way for the high temperature PCM to flow through. This imposes a temperature gradient along the tubes preventing a localised hot spot and high thermal stresses.
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Copyright 2020 The Authors