Abstract
The numerical model FRACSIM developed by the research group in Tohoku University is proved to be an appropriate approximate model of the hot-dry-rock geothermal reservoir capable to address simultaneously the problems associated with hydraulic stimulation, fluid circulation and heat extraction. The structure of the fractured rock is approximated with the network model of fractal geometry. The adopted procedure makes possible to characterize the geothermal reservoirs by parameters measured from the field data. In the present study an improved mathematical model, which accounts for the effect of thermal dispersion on forced convection during the geothermal energy extraction, is proposed. Since the typical flow rate in the fractured reservoir is relatively high, the values of the effective thermal conductivities in the longitudinal and transverse directions are taken to be directly proportional to the values of the fluid velocity. The importance of the thermal dispersion factor for assessment of the total thermal output of the geothermal reservoir is proved.
| Original language | English |
|---|---|
| Pages (from-to) | 207-215 |
| Number of pages | 9 |
| Journal | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 5127 |
| DOIs | |
| Publication status | Published - 2002 Dec 1 |
| Event | Sixth International Workshop on Nondestructive Testing and Computer Simulations in Science and Engineering - St. Petersburg, Russian Federation Duration: 2002 Jun 10 → 2002 Jun 16 |
Keywords
- Fluid
- Fractal
- Fracture
- Geothermal reservoir
- Simulation
- Thermal dissipation
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering