Abstract
Heat transfer from hot dry rock to water flowing through a fracture surrounded by secondary crack network was examined experimentally and numerically. A model of the fracture used in this study consists of a slit between two rectangular packed beds. The slit in which spherical particles are randomly packed is a model of main fracture. Two packed beds filled with spherical particles of equal size represent the secondary crack network. Local mass transfer coefficients on packed spheres were measured by making use of an electrochemical method and compared with empirical equations. Calculated mass transfer coefficients agreed with the measured values in both the slit and the packed beds. Temperature distribution in both the main fracture and the secondary crack network was calculated numerically and the water temperature at a production well was estimated.
| Original language | English |
|---|---|
| Pages (from-to) | 139-162 |
| Number of pages | 24 |
| Journal | Geothermal Science and Technology |
| Volume | 6 |
| Issue number | 1-4 |
| Publication status | Published - 1999 Jan 1 |
Keywords
- Darcy's law
- Electrochemical method
- HDR
- Heat transfer
- Numerical simulation
- Secondary crack network
ASJC Scopus subject areas
- Water Science and Technology
- Ocean Engineering
- Management of Technology and Innovation