| Budget Amount *help |
¥18,590,000 (Direct Cost: ¥14,300,000、Indirect Cost: ¥4,290,000)
Fiscal Year 2015: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2014: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2013: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2012: ¥9,360,000 (Direct Cost: ¥7,200,000、Indirect Cost: ¥2,160,000)
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| Outline of Final Research Achievements |
Composite thermochemical energy storage material (EM) mixed with magnesium hydroxide (Mg(OH)2) and expanded graphite (EG) is developed. It was demonstrated by kinetic analysis by using a thermo-balance that EG has higher thermal conductivity, vapor diffusivity and reactivity than one of conventional Mg(OH)2. Tablet figure of EM was discussed as a suitable figure for practical packed bed reactor having heat-exchanging function. It was shown that mixing mass ratio of Mg(OH)2 : EG = 8 : 1 was the optimum mixing ratio in the stand point of reactivity per unit mass of material. The tablet EM was used for a packed bed experiment for demonstration of practical thermochemical energy storage performance of EM. The EM packed bed had higher heat storage amount and heat storage rate than one of conventional Mg(OH)2. Then, it was demonstrated from this study that thermochemical energy storage system using the EM material would have new possibility for middle-temperature heat utilization.
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