High-temperature high-density heat storage using Ca(OH){sub 2}/CaO thermochemical reaction
- Electric Power R&D Center, Odakacho Nagoya (Japan)
- Kyushu Inst. of Technology, Kitakyushu (Japan)
- Nagoya Univ. (Japan)
The applicability of Ca(OH ){sub 2}/CaO thermochemical reaction for high temperature level heat utilization and for storing heat converted from night-time electricity was studied. The operating temperature level and heat releasing/storing rate were investigated by means of lab-scale heat storage units and the results were evaluated in terms of theoretical values. It was found that the temperature of the CaO reactant bed during the heat-releasing step carried out under 500k Pa water vapor is upgraded from 773 K to 873 K. Complete regeneration was obtained under 670 K and 2-3 kPa. Another practical feature of this type of thermal energy storage system was proven by using an adiabatic reactor incorporated with a fin-type heat exchanger where the produced heat of hydration was recovered by raising the temperature of water from 300 K to 343 K for domestic use. The amount of the heat recovered by this storage unit was about 4 times higher than that will be recovered if the energy storage was carried out by sensible heat of water in the same volume. 4 refs., 11 figs.
- OSTI ID:
- 430506
- Report Number(s):
- CONF-960730-; TRN: 96:006487-0013
- Resource Relation:
- Conference: 5. world congress of chemical engineering, San Diego, CA (United States), 14-18 Jul 1996; Other Information: PBD: 1996; Related Information: Is Part Of The 5th World Congress of chemical engineering: Technologies critical to a changing world. Volume III: Emerging energy technologies clean technologies remediation and emission control fuels and petrochemicals; PB: 1118 p.
- Country of Publication:
- United States
- Language:
- English
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