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http://dx.doi.org/10.9720/kseg.2017.3.293

Characterization of Area Installing Combined Geothermal Systems : Hydrogeological Properties of Aquifer  

Mok, Jong-Koo (Division of Geology and Geophysics, Kangwon National University)
Park, Yu-Chul (Division of Geology and Geophysics, Kangwon National University)
Park, Youngyun (Division of Geology and Geophysics, Kangwon National University)
Kim, Seung-Kyum (Division of Geology and Geophysics, Kangwon National University)
Oh, Jeong-Seok (Division of Geology and Geophysics, Kangwon National University)
Seonwoo, Eun-Mi (Division of Geology and Geophysics, Kangwon National University)
Publication Information
The Journal of Engineering Geology / v.27, no.3, 2017 , pp. 293-304 More about this Journal
Abstract
This study was performed in order to hydrogeological analysis of aquifer, which is a necessary part for evaluating the efficiency of the combined well and open-closed loops geothermal (CWG) systems. CWG systems have been proposed for the effective utilization of geothermal energy by combining open loop geothermal systems and closed loop geothermal systems. Small aperture CWG systems and large aperture CWG systems were installed at a green house land with water curtain facilities in Chungju City. Aquifer tests include pumping tests and step-drawdown tests were conducted to analyse hydrogeological characteristics of aquifer in the study area. The transmissivity was estimated in the range of $13.49{\sim}58.99cm^2/sec$, and the storativity was estimated in the range of $1.13{\times}10^{-5}{\sim}5.20{\times}10^{-3}$. The geochemical analysis showed $Ca^{2+}$ ion and ${HCO_3}^-$ ion were dominant in groundwater. The Langelier Saturation Index and the Ryznar Stability Index showed low scaling potential of groundwater. In the analysis of vertical water temperature change, the geothermal gradient was estimated as $2.1^{\circ}C/100m$, which indicated the aquifer was enough for geothermal systems. In conclusion, groundwater is rich, can stably use geothermal heat, and it is less likely to cause deterioration of thermal energy efficiency by precipitation of carbonate minerals in study area. Therefore, the study area is suitable for installation of the combined geothermal system.
Keywords
CWG systems; hydrogeological analysis; aquifer tests; scaling potential; geothermal gradient;
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  • Reference
1 CCAC (Carrier Air Conditioning Company), 1965, Handbook of air conditioning system design. McGraw-Hill book company, New York, 780 p.
2 Choi, H. M., Lee, J. Y., Cheon, J. Y., Jun, S. C., and Kwon, H. P., 2010, Estimation of optional pumping rate, well efficiency and radius of influence using step-drawdown test, The journal of Engineering Geology, 20(2), 127-136 (in Korean with English abstract).
3 Dawson, K. J. and Istok, J. D., 1991, Aquifer testing: design and analysis of pumping and slug tests, Lewis Publishers, 344 p.
4 Hahn, J. S., 1998, Groundwater environment and pollution, par-kyoungsa, 1071 p.
5 Hantush, M. S., 1962. Flow of ground water in sands of nonuniform thickness; 3. Flow to wells, Journal of Geophysical Research, 67(4), 1527-1534.   DOI
6 Hantush, M. S. and Jacob, C. E. , 1955. Non-steady radial flow in an infinite leaky aquifer, Transactions, American Geophysical Union, 36, 95-100.   DOI
7 Kwon, H. I., Koh, D. C., Jung, B. J., and Ha, K. C., 2017, Quantification of seasonally variable water flux between aquifer and stream in the riparian zones with water curtain cultivation activities using numerical simulation, Journal of the Geology Society of Korea, 53(2), 277-290 (in Korean with English abstract).   DOI
8 KIKAM (Korea Institute of Geoscience and Mineral Resources), 2017, August 8, 2017 access.
9 Kruseman, G. P. and de Ridder, N. A., 1991, Analysis and evaluation of pumping test data, International Institute of Land Reclamation and Improvement, 377 p.
10 Lee, J. Y. and Lee, K. K., 1999, Analysis of the quality of parameter estimates from repeated pumping and slug tests in a fractured porous aquifer system in Wonju, Korea. Ground Water, 37(5), 692-700.   DOI
11 Lee, J. Y., Lee, K. K., Chung, H. J., and Bae, G. O., 1999, Multiple Slug and Pumping Tests for Quality Enhancement of Hydraulic Parameter Estimates, Journal of Korean Society of Groundwater Environment, 6(1), 14-22 (in Korean with English abstract).
12 Neuman, S. P., 1974. Effect of partial penetration on flow in unconfined aquifers considering delayed gravity response, Water Resources Research, 10(2), 303-312.   DOI
13 Self, S. J., Reddy, B. V., and Rosen, M. A., 2013, Geothermal heat pump systems: status review and comparison with other heating options. Applied Energy, 101, 341-348.   DOI
14 Park, B. S. and Yeo, S. C., 1971, Explanatory text of the geological map of Moggye sheet. Geological Survey of Korea, 40 p.
15 Possemiers, M., Huysmans, M., and Batelaan, O., 2014, Influence of aquifer thermal energy storage on groundwater quality: A review illustrated by seven case studies from Belgium. Journal of Hydrology: Regional Studies, 2, 20-34.   DOI
16 Rafferty, K. D., 2004, Water chemistry issues in geothermal heat pump systems. ASHRAE Transactions, 110, 550-554.
17 Song, Y. and Lee, T. J., 2015, Geothermal development in the Republic of Korea: Country update 2010-2014. Proceedings World Geothermal Congress 2015, Melbourne, April 19-25, 1-8.