Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Analysis of the Initial Cost Payback Period on the Open-loop Geothermal System Using Two Wells

복수정을 이용한 개방형 지열 시스템의 초기투자비 회수기간 분석

  • Cho, Jeong-Heum (Department of New & Intl Business Division, EAN Technology) ;
  • Nam, Yujin (Department of Architectural Engineering, Pusan National University)
  • 조정흠 ((주)이에이엔테크놀로지 신규 및 해외사업 개발 본부) ;
  • 남유진 (부산대학교 건축공학과)
  • Received : 2016.07.06
  • Accepted : 2017.01.05
  • Published : 2017.03.10
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Abstract

Recently, ground source heat pump systems are being used in buildings for cooling and heating to reduce greenhouse gas and save energy. However, ground source heat pump systems mainly use the vertical closed-loop geothermal system design rather than the open-loop geothermal system design. This is due to a lack of knowledge and few research feasibility studies. In this research, a dynamic thermal analysis numerical simulation based on a standard house model was conducted for an open-loop geothermal system. Based on heating load analysis results, the life cycle costs of a standard house using an open two-well geothermal system were analyzed and compared with a vertical closed-loop geothermal system, and a diesel boiler. As a result, it was found that using an open two-well geothermal system shows economic return on investment after three years.

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References

  1. Lee, C. G., Kim, J. D., Im, T. S., Choi, M. S., Pang, S. K., and Ham, H. D., 2013, Economic evaluation on energy system using river water, Transactions of the Korea society of geothermal energy engineers, Vol. 9, No. 2, pp. 25-31. https://doi.org/10.17664/ksgee.2013.9.2.025
  2. Yang, S. J., Kim, J. M., Kim, J. Y., Hong, W. H., and Ahn, C. H., 2008, A study on economic evaluation of geothermal heat pump system in dormitory of college, Journal of Korean Institutie of Architectural Sustainable Environment and Building Systems, Vol. 2, No. 4, pp. 14-19.
  3. Russo, S. L. and Civita, M. V., 2009, Open-loop ground-water heat pumps development for large buildings : A case study, Geothermics, Vol. 38, No. 3, pp. 335-345. https://doi.org/10.1016/j.geothermics.2008.12.009
  4. Russo, S. L., Taddia, G., Baccino, G., and Verda, V., 2011, Different design scenarios related to an open loop groundwater heat pump in a large building : Impact on subsurface and primary energy consumption, Energy and Buildings, Vol. 43, No. 2-3, pp. 347-357. https://doi.org/10.1016/j.enbuild.2010.09.026
  5. Russo, S. L., Taddia, G., and Verda, V., 2012, Development of the thermally affected zone (TAZ) around a groundwater heat pump (GWHP) system : A sensitivity analysis, Geothermics, Vol. 43, pp. 66-74. https://doi.org/10.1016/j.geothermics.2012.02.001
  6. Nam, Y. J. and Ooka, R., 2010, Numerical simulation of ground heat and water transfer for groundwater heat pump system based on real-scale experiment, Energy and Buildings, Vol. 42, No. 1, pp. 69-75. https://doi.org/10.1016/j.enbuild.2009.07.012
  7. Cho, J. H. and Nam, Y. J., 2015, A study on the characteristics of heat source temperature for two-well geothermal system using numerical simulation, Korean Journal of Air-Conditioning and Refrigeration Engineering, Vol. 27, No. 4, pp. 207-212. https://doi.org/10.6110/KJACR.2015.27.4.207
  8. Cho, J. H. and Nam, Y. J., 2015, The effect of soil permeability and pumping rate on performance of twowell geothermal heat pump system, Transactions of the Korea society of geothermal energy engineers, Vol. 11, No. 4, pp. 28-34. https://doi.org/10.17664/ksgee.2015.11.4.028
  9. Kim, M. Y., Kim, Y. I., and Chung, K. S., 2015, Economic comparison of medium capacity and multi boiler system applied to military officer housing, Journal of Energy Engineering, Vol. 24, No. 4, pp. 81-88. https://doi.org/10.5855/ENERGY.2015.24.4.081
  10. Cho, J. H., 2016, Study on the optimum design method of open-loop geothermal system using numerical simulation, Master's thesis, Pusan national university.
  11. KS B 8292, 2015, Water-to-water ground source heat pump unit, Korean Standards & Certifications.