Heat Storage Characteristics of Shape-Stabilized Latent Heat Storage Particles in a Fluidized Bed-Type Heat Storage Vessel.

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  • 形状安定化球状潜熱蓄熱体を用いた流動層型潜熱蓄熱槽の流動および蓄熱特性
  • ケイジョウ アンテイカ キュウジョウ センネツ チクネツタイ オ モチイタ リ

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Abstract

This paper deals with fluidization and heat storage characteristics of shape-stabilized latent heat storage particles packed into a fluidized bed-type heat storage vessel. The shape-stabilized latent heat storage material consists of normal paraffin (pentacosane C25H52, latent heat 164 kJ/kg, melting point of 327.2 K) as a latent heat material, and polyethylene as a shape-stabilizing material. The pressure losses both on fluidized and on fixed particle layers were measured in order to investigate flow behavior in the heat storage vessel. It was found that the pressure loss of the fluidized particle layer was lower than that of the fixed particle layer. Furthermore, the effects of hot air flow rate, inlet air temperature and the amount of heat storage particles packed into the heat storage vessel on the completion time of the heat storage process were investigated. As a result, the nondimensional correlations for the completion time of the heat storage process were expressed in terms of nondimensional pumping power, the Stefan number and the ratio of the packed particle layer height to the diameter of the cylindrical heat storage vessel.

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