太陽熱蓄熱用円筒形セラミックカプセルにおけるPCMの融解過程

抄録

Heat transfer between the high temperature fluid and the cylindrical ceramic capsule and the melting process of the PCM inside the capsule were experimented and simulated. Realizable k-ε turbulence model is used in this simulation. Numerically solved results showed trends consistent with the experiment. In the down flow, it was confirmed that the melting front is like a conical shape because the near-wall-fluid temperature on the upstream side was high. It is found that the heat transfer coefficient between the hot air and the ceramic capsule depends on capsule height.