Optimal joule heating of the subsurface
- Danville, CA
- Livermore, CA
A method for simultaneously heating the subsurface and imaging the effects of the heating. This method combines the use of tomographic imaging (electrical resistance tomography or ERT) to image electrical resistivity distribution underground, with joule heating by electrical currents injected in the ground. A potential distribution is established on a series of buried electrodes resulting in energy deposition underground which is a function of the resistivity and injection current density. Measurement of the voltages and currents also permits a tomographic reconstruction of the resistivity distribution. Using this tomographic information, the current injection pattern on the driving electrodes can be adjusted to change the current density distribution and thus optimize the heating. As the heating changes conditions, the applied current pattern can be repeatedly adjusted (based on updated resistivity tomographs) to affect real time control of the heating.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- DOE Contract Number:
- W-7405-ENG-48
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Number(s):
- US 5325918
- OSTI ID:
- 869380
- Country of Publication:
- United States
- Language:
- English
Hydrological properties of Topopah Spring Tuff: Laboratory measurements
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journal | January 1987 |
Analysis of electrical conductivity imaging
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journal | July 1981 |
Convexity properties of inverse problems with variational constraints
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journal | January 1991 |
Variational constraints for electrical-impedance tomography
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Crossâborehole resistivity tomography
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journal | August 1991 |
Comparing Reconstruction Algorithms for Electrical Impedance Tomography
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journal | November 1987 |
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