연속 운전 방식의 대수층 축열 시스템에 대한 수치 모델링
Numerical Modeling on the Aquifer Thermal Energy Storage System under Continuous Operation Regime
0
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
This paper presents numerical investigations and thermohydraulic evaluation on the two-well model of aquifer thermal energy storage (ATES) systems operated under continuous flow regime. A three-dimensional finite-difference model for groundwater flow and heat transport is used to analyze the thermal energy storage in the aquifer. The model includes the effects of convection and conduction heat transfer, heat loss to the adjacent confining strata, and hydraulic anisotropy. The operation scenario consists of continuous injection and recovery from two wells and four periods per year to simulate the seasonal temperature conditions. The calculated temperatures at the producing well were relatively constant within certain range through the year and fluctuating with a quarterly year period. Operation schedules, injection temperature, injection/production rate, and geometry of well arrangement used in the model are shown to impact the predicted temperature profiles at each stage and the recovery water temperature. But aquifer thickness and hydraulic anisotropy have a minimal effect on the performance of ATES systems.
Abstract
This paper presents numerical investigations and thermohydraulic evaluation on the two-well model of aquifer thermal energy storage (ATES) systems operated under continuous flow regime. A three-dimensional finite-difference model for groundwater flow and heat transport is used to analyze the thermal energy storage in the aquifer. The model includes the effects of convection and conduction heat transfer, heat loss to the adjacent confining strata, and hydraulic anisotropy. The operation scenario consists of continuous injection and recovery from two wells and four periods per year to simulate the seasonal temperature conditions. The calculated temperatures at the producing well were relatively constant within certain range through the year and fluctuating with a quarterly year period. Operation schedules, injection temperature, injection/production rate, and geometry of well arrangement used in the model are shown to impact the predicted temperature profiles at each stage and the recovery water temperature. But aquifer thickness and hydraulic anisotropy have a minimal effect on the performance of ATES systems.
참고문헌 (14)
- Allen D. M., "The Current Status of Geothermal Exploration and Development in Canada", Proc. World Geothermal Congress 2000, pp.55~58 (2000)
- Breger, D. B., "Thermal Energy Storage in the Ground: Comparative Analysis of Heat Transfer Modeling Using U-Tubes and Boreholes", Solar Energy, 56, pp.493~503 (1996)
- Center for Petroleum and Geosystems Engineering, "Technical Documentation for UTCHEM 9.0, University of Texas at Austin", ~ (2000)
- Chavalier, S., "Modelling of Heat Transfer with the Random Walk Method. Part 1. Application to Thermal Storage in Porous Aquifers", J. of Hydrology, 222, pp.129~139 (1999)
- Nielsen, K., "Thermal Energy Storage" (2003), Trondheim
- O’Sullivan, M. J., "State of the Art of Geothermal Reservoir Simulation", Geothermics, 30, pp.395~429 (2001)
- Paksoy, H. O., "Heating and Cooling of a Hospital Using Solar Energy Coupled with Seasonal Thermal Energy Storage in Aquifer", Renewable Energy, 19, pp.177~122 (2000)
- Paksoy, H. O., "Aquifer Thermal Storage (ATES) for Air-Conditioning of Supermarket in Turkey", Renewable Energy, 29, pp.1991~1996 (2004)
- Probert, T., "Thermohydraulic Evaluation of Two ATES Projects in Southern Sweden", Proc. of Int’l Symp. on Aquifer Thermal Energy Storage, pp.73~81 (1994)
- Rafferty, K., "Ground Water Issues in Geothermal Heat Pump Systems", Groundwater, 41, pp.408~410 (2003)
- Rosen, M. A., "Second-Law Analysis of Aquifer Thermal Energy Storage Systems", Energy, 24, pp.167~182 (1999)
- Sanner, B., "Shallow Geothermal Energy", GHC Bulletin, pp.19~25 (2001)
- Schmidt, T., "“Seasonal Thermal Energy Storage in Germany,” Proc. ISES Solar World Congress 2003, pp. 1-7", ~ (2003)
- Tenma, N., "Model Study of Thermal Storage System by FEHM Code", Geothermics, 32, pp.603~607 (2003)