TY - JOUR
T1 - Thermophysical properties and thermal characteristics of phase change emulsion for thermal energy storage media
AU - Kawanami, Tsuyoshi
AU - Togashi, Kenichi
AU - Fumoto, Koji
AU - Hirano, Shigeki
AU - Zhang, Peng
AU - Shirai, Katsuaki
AU - Hirasawa, Shigeki
N1 - Funding Information:
This work was partially supported by the Strategic Basic Research Programs (Advanced Low Carbon Technology Research Development Program; contract no.14529588) of Japan Science and Technology Agency and also the Bilateral Joint Research Projects of the Japan Society for the Promotion of Science . The authors are grateful to Mr. Daisuke Tandai for his contribution to the experiment.
PY - 2016/12/15
Y1 - 2016/12/15
N2 - A great deal of attention has been paid to energy saving devices in place of conventional air-cooled and water-cooled devices. The thermal energy storage system that uses the latent heat of a PCM (phase change material) for air-conditioning or heating has recently become popular because it does not require high electric power and it saves energy. An emulsion dispersed nano-size particles of phase change material is produced. We discuss with the thermophysical properties, the stability of emulsion, and the heat transport characteristics as a thermal functional fluid. The testing emulsion, which has nano-size particles as the discrete phase, is produced with a D-phase emulsification method. The diameter of discrete phase in the emulsion is measured for evaluation of the long-term stability of emulsion. In addition, the DSC (differential scanning calorimetry) curve of emulsion is determined. Thermophysical properties such as viscosity and thermal conductivity of emulsions were studied in this work, and was compared with that of the base fluid. The results reveal that the emulsion with the D-phase emulsification method has the superior stability. From the differential thermal analysis, the DSC curve of present emulsion indicates a discontinuous change at the phase change temperature of phase change material due to its latent heat.
AB - A great deal of attention has been paid to energy saving devices in place of conventional air-cooled and water-cooled devices. The thermal energy storage system that uses the latent heat of a PCM (phase change material) for air-conditioning or heating has recently become popular because it does not require high electric power and it saves energy. An emulsion dispersed nano-size particles of phase change material is produced. We discuss with the thermophysical properties, the stability of emulsion, and the heat transport characteristics as a thermal functional fluid. The testing emulsion, which has nano-size particles as the discrete phase, is produced with a D-phase emulsification method. The diameter of discrete phase in the emulsion is measured for evaluation of the long-term stability of emulsion. In addition, the DSC (differential scanning calorimetry) curve of emulsion is determined. Thermophysical properties such as viscosity and thermal conductivity of emulsions were studied in this work, and was compared with that of the base fluid. The results reveal that the emulsion with the D-phase emulsification method has the superior stability. From the differential thermal analysis, the DSC curve of present emulsion indicates a discontinuous change at the phase change temperature of phase change material due to its latent heat.
KW - Emulsion
KW - Phase change material
KW - Thermal storage
KW - Thermophysical property
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U2 - 10.1016/j.energy.2016.04.021
DO - 10.1016/j.energy.2016.04.021
M3 - Article
AN - SCOPUS:84964662653
VL - 117
SP - 562
EP - 568
JO - Energy
JF - Energy
SN - 0360-5442
ER -