ISSN Online: 2377-424X
ISBN Print: 0-89116-299-2
International Heat Transfer Conference 7
ON THE HEAT TRANSFER IN THE LATENT HEAT THERMAL ENERGY STORAGE CAPSULE
要約
The characteristic variation of the rate of
heat transfer to and from a latent heat thermal
energy storage capsule was investigated analytically
and experimentally. Basic experiments were
carried out to simulate a solar energy storage
capsule, using a horizontal cylindrical capsule
(750mm length, 48 O.D.) filled with naphthalene as
the phase change material.
The natural convection within the liquid phase was observed, floating fine aluminum powder. In the heat storage process, the phase-front variation was closely interacted with the natural convection, although conduction was dominant in the heat removal process.
For the heat storage process, the finite difference calculations considering the natural convection effects well expressed the measured heat flux. The range of the Grashof Number in which natural convection became significant was also discussed by calculation.
The natural convection within the liquid phase was observed, floating fine aluminum powder. In the heat storage process, the phase-front variation was closely interacted with the natural convection, although conduction was dominant in the heat removal process.
For the heat storage process, the finite difference calculations considering the natural convection effects well expressed the measured heat flux. The range of the Grashof Number in which natural convection became significant was also discussed by calculation.