An ammine complex formation reaction with strontium chloride is promised to storage a waste heat up to 90 ℃ and to release its heat at atmospheric temperature up to 0 ℃. In this reaction system, heat transfer rate is an important factor in determining heat release performance. In this study, overall reaction rate of the reactant packed bed was measured using volumetric method to evaluate the influence of the thickness of the packed bed. As a result, the smaller thickness led to larger reaction rate. When the thickness of the packed bed was 2.5mm, the reaction time was 6 times or more long than that of 0.5mm. Besides, the heat resistance was quantified by another experiments as well as and the heat transfer simulation. As a result, the effective thermal conductivity of SrCl_2 packed bed was λ_<eff>=0.18W/m/K and thermal contact resistance was R_c=2.3×10^<-3>m^2・K/W. It was also found that the simulation results agree with the heat release behavior.
