Concerning a vertical type latent heat TES (thermal energy storage) capsule having the vertical axis, experiments and analyses were performed to discuss the heat transfer mechanisms in the heat storage process. The time dependency of the local heat flux across the capsule wall was measured and the natural convection flow within the capsule was observed, varying the height of the phase change material (PCM). The finite difference analyses considering the natural convection flow were also done. As the result, it was shown that the rate of the heat storage increased with a decreasing capsule height, because the melted liquid PCM with high temperature stagnated in the upper part of the capsule by stratification.
JSME International Journal Series C Mechanical Systems, Machine Elements and Manufacturing
JSME International Journal Series B Fluids and Thermal Engineering
JSME International Journal Series A Solid Mechanics and Material Engineering
JSME international journal. Ser. C, Dynamics, control, robotics, design and manufacturing
JSME international journal. Ser. 3, Vibration, control engineering, engineering for industry
JSME international journal. Ser. A, Mechanics and material engineering
JSME international journal. Ser. 1, Solid mechanics, strength of materials