In this study, the heat transfer enhancement which effects of several fins on metal hydride particle layer are estimated by experiment and simulation. The unsteady state heat conduction calculation of MH particle layer with and without fins was researched by the Solidworks simulation software and the experimental method including calculation parameters, fins' charging volume ratio and the fin shape such as cross fin and circular cross fin. Besides, another estimation parameter is the diameter of storage tank. One storage tank has an outer diameter of 80 mm, an inner diameter of 78 mm, the other has an outer diameter of 25 mm and an inner diameter of 23.5 mm. The number of fins was increased until the charging volume ratio of the fin reaching to 25 volume %. We estimated the heat transfer enhancement influence of the fins on the MH ally layer. According to our calculation results, the effective thermal conductivity is increased with increasing of charging volume ratio of fin, but this heat transfer enhancing effect is saturated while it exceeded the 10 volume percentage. In our simulation model of a circle cross fin, the tank was set as an outer diameter of 52 mm and an inner diameter of 50 mm. In the simulation results of using circle cross fins cases, the highest heat transfer enhancement effect was obtained when circular diameter of circular cross fin was 24 mm. Compared with cross fins (which has a heat transfer enhancing effect of 4.68 times compared with no fins' case), the volume content of circle cross fin was 1.4% higher than that of cross fin. However, the heat transfer enhancement effect of circular cross fin was 2.46 times higher than that of cross fin. Besides, it is confirmed that circle cross fin whose charging volume ratio is under 10% can achieve a high heat transfer enhancing effect and is suitable to heat transfer enhancing of MH particle layer.
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