소성Dolomite의 수화 및 탈수반응을 이용한 축열에 관한 연구

이수각; 이영세; 김종식

Journal of the Korean Industrial and Engineering Chemistry, Vol.3, No.3, 507-515, September, 1992

Export Citation

소성Dolomite의 수화 및 탈수반응을 이용한 축열에 관한 연구

Studies on the Heat Storage Using the Hydration/Dehydration of the Calcined Dolomite

이수각, 이영세, 김종식

초록

본 연구에서는 소성 dolomite와 수증기계의 열화학 반응을 축열식열교환기에 응용하기 위해 충전층 형태의 실험장치에서 축열 및 방열특성에 관한 연구를 수행하였다. 실험 data는 수화반응온도 150-400℃, 탈수반응온도 700-800℃ 및 수증기 유량 294, 430, 567 g/hr의 실험조건에서 얻은 결과이다. 본 연구의 실험범위내에서는 소성 dolomite중 MgO가 수화반응 과정중 수화되지 않음을 알았다. 따라서 소성된 dolomite중 MgO는 불활성 물질로 취급할 수 있다. 또한 율속단계는 충전층의 입구와 벽면으로부터, 출구와 중심쪽으로 반응이 진행되므로 반응율속보다는 열전달율속으로 진행된다고 생각된다.

This study was carried out to investigate the heat-storage/-release characteristics of the thermochemical reaction of the calcined dolomite and steam system for the application of regenerative heat exchangers with the packed bed shape experimental apparatus. The experimental data were obtained at the following conditions ; the hydration temperature was 150-400℃, the dehydration temperature was 700-800℃ and the steam mass flow rates were 294, 430 and 567 g/hr. In the present study, it was found that MgO of the calcined dolomite was not hydrated during the hydration process under the studied experimental conditions. Therefore, MgO of the calcined dolomite can be regard as an inert material. Because the reaction was proceeded from the packed bed input to packed bed output and from wall to center, it could be thought that the rate determining step is not the reaction itself but the heat transfer.

[References]

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[1] 박원훈, 박건유, 정문조, 박태진, 홍성안, 최형준, 김병화, 김상돈, 신병철, 1차년도보고서, N 235-2796-6, KAIST (1987)

[2] Rosemary JK, Bauerle GL, Springer TH, Energy, 3, 321 (1979)

[3] 이수각, 이진국, 김홍제, 이동원, 주문창, 박상래, 2차년도보고서, KIER (1990)

[4] Lee SK, Kim JS, Lee YS, Masanobu H, HWAHAK KONGHAK, 28(6), 684 (1990)

[5] Ervin G, J. Solid State Chem., 22, 51 (1977)

[6] Kanzawa A, Arai Y, Sol. Energy, 27, 289 (1981)

[7] Matsuda H, Lee SK, Ishizu T, Hasatani M, Kag. Kog. Ronbunshu, 13, 20 (1987)

[8] Lee SK, Matsuda H, Hasatani M, Kag. Kog. Ronbunshu, 12, 165 (1986)

[9] Levenspiel O, Chem. Eng. Sci., 38, 2035 (1983)

[10] Spiga G, Spiga M, Warme Stoffuebertragung, 16, 191 (1982)

[11] Fujii I, Tsuchiya K, Higano M, Tamada J, Sol. Energy, 34, 367 (1985)

[12] Halstead PE, Moore AE, J. Chem. Soc., 3873 (1957)

[13] Bauerle G, Chung D, Ervin G, Guon J, Springer T, Proc. Joint Conf. American Section Solar Energy Soc. and the Solar Energy Soc. Can. Inc., 8, 192 (1976)