Thermophysical and heat transfer properties of phase change material candidate for waste heat transportation system

• Published in: Heat and mass transfer 2008-05, Vol.44 (7), p.763-769
• Main Authors: Kaizawa, Akihide, Maruoka, Nobuhiro, Kawai, Atsushi, Kamano, Hiroomi, Jozuka, Tetsuji, Senda, Takeshi, Akiyama, Tomohiro
• Format: Article
• Language: English
• Subjects: Applied sciences; Energy; Energy. Thermal use of fuels; Engineering; Engineering Thermodynamics; Exact sciences and technology; Heat and Mass Transfer; Industrial Chemistry/Chemical Engineering; Technical Note; Thermodynamics; Transport and storage of energy
• ISSN: 0947-7411; 1432-1181
• DOI: 10.1007/s00231-007-0311-2

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.