THERMAL-ENERGY STORAGE IN A DEEP SANDSTONE AQUIFER IN MINNESOTA: FIELD OBSERVATIONS AND THERMAL ENERGY-TRANSPORT MODELING.
By: R. T. Miller
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Abstract
A study of the feasibility of storing heated water in a deep sandstone aquifer in Minnesota is described. The aquifer consists of four hydraulic zones that are areally anisotropic and have average hydraulic conductivities that range from 0. 03 to 1. 2 meters per day. A preliminary axially symmetric, nonisothermal, isotropic, single-phase, radial-flow, thermal-energy-transport model was constructed to investigate the sensitivity of model simulation to various hydraulic and thermal properties of the aquifer. A three-dimensional flow and thermal-energy transport model was constructed to incorporate the areal anisotropy of the aquifer. Analytical solutions of equations describing areally anisotropic groundwater flow around a doublet-well system were used to specify model boundary conditions for simulation of heat injection. The entire heat-injection-testing period of approximately 400 days was simulated. Model-computed temperatures compared favorably with field-recorded temperatures, with differences of no more than plus or minus 8 degree C. For each test cycle, model-computed aquifer thermal efficiency, defined as total heat withdrawn divided by total heat injected, was within plus or minus 2% of the field-calculated values.
| Publication type | Conference Paper |
|---|---|
| Publication Subtype | Conference Paper |
| Title | THERMAL-ENERGY STORAGE IN A DEEP SANDSTONE AQUIFER IN MINNESOTA: FIELD OBSERVATIONS AND THERMAL ENERGY-TRANSPORT MODELING. |
| ISBN | 0841209863 |
| Year Published | 1986 |
| Language | English |
| Publisher | ACS |
| Publisher location | Washington, DC, USA |
| Larger Work Title | Proceedings of the Intersociety Energy Conversion Engineering Conference |
| First page | 682 |
| Last page | 685 |
| Conference Title | 21st Intersociety Energy Conversion Engineering Conference: Advancing toward Technology Breakout in Energy Conversion. |
| Conference Location | San Diego, CA, USA |
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