Field test of Six-Phase Soil Heating and evaluation of engineering design code
A field test was conducted to evaluate the performance of Six-Phase Soil Heating to enhance the removal of contaminants. The purpose of the test was to determine the scale-up characteristics of the Six-Phase Soil Heating technology and to evaluate a computer process simulator developed for the technology. The test heated a 20-ft diameter cylinder of uncontaminated soil to a 10-ft depth. Six-phase ac power was applied at a rate of 30--35 kW using a power system built from surplus electrical components. The test ran unattended, using a computer-based system to record data, alert staff of any excursions in operating conditions via telephone, and provide automatic shut-off of power depending on the type of excursion. The test data included in situ soil temperatures, voltage profiles, and moisture profiles (using a neutron-probetechnique). After 50 days of heating, soil in the center of the array at the 6-ft depth reached 80{degrees}C. Soil temperatures between the two electrodes at this depth reached approximately 75{degrees}C. Data from this test were compared with those predicted by a computer process simulator. The computer process simulator is a modified version of the TOUGH2 code, a thermal porous media code that can be used to determine the movement of air and moisture in soils. The code was modified to include electrical resistive heating and configured such that an application could be run quickly on a workstation (approximately 5 min for 1 day of field operation). Temperature and soil resistance data predicted from the process simulations matched actual data fairly closely. A series of parametric studies was performed to assess the affect of simulation assumptions on predicted parameters.
- Research Organization:
- Pacific Northwest Lab., Richland, WA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 10143255
- Report Number(s):
- PNL-SA-21537; CONF-930205-34; ON: DE93009477
- Resource Relation:
- Conference: Waste management `93,Tucson, AZ (United States),28 Feb - 4 Mar 1993; Other Information: PBD: Feb 1993
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SOILS
CONTAMINATION
POROSITY
REMEDIAL ACTION
HEAT TRANSFER
ORGANIC COMPOUNDS
VOLATILITY
ARID LANDS
NEUTRON PROBES
T CODES
THERMAL CONDUCTIVITY
OXIDATION
FIELD TESTS
WATER TABLES
INJECTION WELLS
HANFORD RESERVATION
THERMOCOUPLES
ELECTRODES
MATHEMATICAL MODELS
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SITE RESOURCE AND USE STUDIES