Abstract
A waste heat transportation system––trans-heat (TH) system––is quite attractive that uses the latent heat of a phase change material (PCM). The purpose of this paper is to study the thermophysical properties of various sugars and sodium acetate trihydrate (SAT) as PCMs for a practical TH system and the heat transfer property between PCM selected and heat transfer oil, by using differential scanning calorimetry (DSC), thermogravimetry-differential thermal analysis (TG-DTA) and a heat storage tube. As a result, erythritol, with a large latent heat of 344 kJ/kg at melting point of 117°C, high decomposition point of 160°C and excellent chemical stability under repeated phase change cycles was found to be the best PCM among them for the practical TH system. In the heat release experiments between liquid erythritol and flowing cold oil, we observed foaming phenomena of encapsulated oil, in which oil droplet was coated by solidification of PCM.
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Acknowledgments
This research was partially supported by the project “Technology of Energy Saving Strategy by Pluralistic Heat Supplying Using Low Temperature Waste heat (Technology of Heat Transportation Using PCM)” of the Ministry of Environment, Japan and the project “Development of New Chemical Absorption System, Cost Saving CO2 Capture System (COCS)” of the Research Institute of Innovative Technology for the Earth (RITE).
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Kaizawa, A., Maruoka, N., Kawai, A. et al. Thermophysical and heat transfer properties of phase change material candidate for waste heat transportation system. Heat Mass Transfer 44, 763–769 (2008). https://doi.org/10.1007/s00231-007-0311-2
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DOI: https://doi.org/10.1007/s00231-007-0311-2