Heat transfer from a hot rock to water flowing through a crack
- Kyoto Univ. (Japan). Dept. of Chemical Engineering
- Tottori Univ. (Japan). Dept. of Materials Science
Heat transfer between a fluid flowing in a slit and particles packed in it and that between the fluid and the slit wall are important for the extraction off heat from hot dry rocks. Mass-transfer coefficients, instead of the heat-transfer coefficients, on the packed particles in the slit and on the slit wall were measured by making use of the electrochemical method. The results indicate that the mass-transfer coefficient on the particles increases with decreasing void fraction and approaches that in a usual packed bed. The mass-transfer coefficient at the wall increases also with decreasing void fraction. New empirical equations for the mass-transfer coefficients on the packed particles in the slit and on the slit wall are presented.
- OSTI ID:
- 131594
- Journal Information:
- Heat Transfer - Japanese Research, Journal Name: Heat Transfer - Japanese Research Journal Issue: 7 Vol. 23; ISSN 0096-0802; ISSN HTJPAU
- Country of Publication:
- United States
- Language:
- English
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