2017 Volume 31 Issue 3 Pages 118-124
Almost heat-amount of low temperature (less than 100 °C as hot spring heat and factory-waste-heat) heat-source has been thrown away without using. It is expected that effective utilizing of these heat-sources that have a large quantity of heat. The purpose of this research is phase change characteristic evaluation of the nanosuspension type latent heat storage material. Tetracosane (CH3(CH2)22CH3=338.66, purity>99%, melting point 50.0~53.0°C) is used for dispersion material as a latent heat storage material of nanosuspension. The nanosuspension consists of tetracosane as the dispersed latent heat storage material, the distilled water and the non-ion surfactant. The latent heat storage material is dispersed averaged diameter about 250 nanometers in continuous water phase by an ultrasonic homogenizer. This paper deals with the phase change characteristics that estimated by using differential scanning calorimeter. The heating or cooling rate of DSC and the mass composition ratio of tetracosane are chosen as experimental parameter. The useful thermopysical properties (specific heat, apparent melting or freezing point, latent heat) are obtained.
