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http://dx.doi.org/10.12813/kieae.2017.17.3.119

Hydraulic feasibility study on the open-loop geothermal system using a pairing technology  

Bae, Sangmu (Dept. of Architectural Engineering, Pusan National Univ.)
Kim, Hongkyo (Dept. of Architectural Engineering, Pusan National Univ.)
Kim, Hyeon-woo (Dept. of Architectural Engineering, Pusan National Univ.)
Nam, Yujin (Dept. of Architectural Engineering, Pusan National Univ.)
Publication Information
KIEAE Journal / v.17, no.3, 2017 , pp. 119-124 More about this Journal
Abstract
Purpose: Groundwater heat pump (GWHP) system has high coefficient of performance than conventional air-source heat pump system and closed-loop type geothermal system. However, there is problem in long-term operation that groundwater raise at the diffusion well and reduced at the supply well. Therefore, it is necessary to accurately predict the groundwater flow, groundwater movement and control the groundwater level in the wells. In this research, in consideration of hydrogeological characteristic, groundwater level and groundwater movement were conducted analysis in order to develop the optimal design method of the two-well system using the pairing pipe. Method: For the optimum design of the two-well system, this research focused on the design method of the pairing pipe in the simulation model. Especially, in order to control the groundwater level in wells, pairing pipe between the supply well and diffusion well was developed and the groundwater level during the system operation was analyzed by the numerical simulation. Result: As the result of simulation, the groundwater level increased to -2.65m even in the condition of low hydraulic conductivity and high pumping flow rate. Consequently, it was found that the developed system can be operated stably.
Keywords
Groundwater Heat Pump System; Hydrogeological Characteristic; Pairing Pipie;
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Times Cited By KSCI : 3  (Citation Analysis)
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1 Richard E. Goodman, Introduction to Rock Mechanics, Second Edition, WILEY, 1989
2 한정상, 한혁상, 한찬, "지열에너지(지열냉난방.지열발전)", 한림원, 2010 // (Hahn, Jeong-Sang, Han, Hyok-Sang, Hahn, Chan, Geothermal Energy, hanrimwon, 2010)
3 A. Sciacovelli, E. Guelpa, V. Verda, "Multi-scale Modeling of the Environmental Impact and Energy Performance of Open-loop Groundwater Heat Pumps in Urban Areas" Applied Thermal Engineering, Vol.71, Issue 2, 2014
4 Lei Fei, Hu Pingfang, "Energy and Exergy Analysis of a Ground Water Heat Pump System" Physics Procedia, Vol.24, Issue 11, 2012
5 Ji Liang, Qingchun Yang, Licai Liu, Xuyong Li, "Modeling and Performance Evaluation of Shallow Ground Water Heat Pumps in Beijing Plain, China" Energy and Buildings, Vol.43, Part A, 2012
6 김우진, 이승래, 전준서, 김민준, 김민섭, 전윤수, "개방형 지열 시스템 설계 방법의 개선 및 적용", 신재생에너지, 제 12권 제 4호, 2016 // (Kim, Woojin, Lee, Seungrae, Jeon, Junseo, Kim Minjun, Kim Minseop, Jeon Yoonsoo, "Improved Design Method of Open Loop Geothermal System and its Applications" New & Renewable Energy, Vol.12, No.4, 2016)
7 박영윤, 목종구, 장범주, 박유철, 이진용, "개방형과 밀폐형 지열냉 난방시스템이 수리지질학적 특성에 미치는 영향", 지질학회지, 제 49권 제 6호, 2013 // (Park, Youngyun, Mok, Jong-Koo, Jang, Bum-Ju, Park, Yu-Chul, Lee, Jin-Yong, "Influence of Open and Closed loop Geothermal Cooling and Heating Systems on Hydrogeological Properties" Journal of the Geological Society of Korea, Vol.49, No.6, 2013)
8 김주화, 김주영, 홍원화, 안창환, "지하수 이용 지열 히트펌프 시스템의 주거용 건물 적용시 난방성능 특성에 관한 연구", 한국주거학회논문집, 제 19권 제 5호, 2008 // (Kim, Ju-Hwa, Kim, Ju-Young, Hong, Won-Hwa, Ahn, Chang-Hwan, "A Study on the Heating Performance of SCW Type Geothermal Heat Pump System for Residential House" Journal of the Korean Housing Association, Vol.19, No.5, 2008)
9 박정환, 김주영, 홍원화, 안창환, "주거용 건물에 적용된 지하수 이용 지열 히트펌프 시스템의 냉방성능에 관한 연구", 대한건축학회논문집-계획계, 제 24권 제 3호, 2008 // (Park, Jeung-Hwan, Kim, Ju-Young, Hong, Won-Hwa, Ahn, Chang-Hwan, "Research on the Cooling Performance Evaluation of Groundwater Heat Pump System for Residence House" Journal of the Architectural Institute of Korea Planning & Design, Vol.24, No.3, 2008)
10 배상무, 김홍교, 김현우, 남유진, "개방형 지열 시스템 설계법 개발 을 위한 관정 주위 지중 온도 환경 검토", 한국지열에너지학회논문집, 제 13권 제 1호, 2017 // (Bae, Sangmu, Kim, Hongkyo, Kim, Hyeon-Woo, Nam, Yujin "Study on the Underground Thermal Environment around Wells for a Design Method of Open-Loop Geothermal System" Korea Society of Geothermal Energy Engineers, Vol.13, No.1, 2017)
11 성현정, 김용제, 이철우, 김구영, 우남칠, "균열암반에서의 양수시험 자료 해석과 일반 방사상 유동모델의 적용성 연구", 자원환경지질, 제38권 제 2호, 2005 // (Seong, Hyeon-jeong, Kim, Yongje, Kim, Kue-Young, Woo, Namchil, Lee, Chulwoo, "Analysis of Aquifer Test Data in Fractured Aquifers and the Application of the Generalized Radial Flow" The Korean Society of Economic and Environmental Geology, Vol.38, No.2, 2005)
12 Yujin Nam, Ryozo Ooka, Suckho Hwang, "Development of a Numerical Model to Predict Heat Exchange Rates for a Ground Source Heat Pump System" Energy and Buildings, Vol.40, Issue.12, 2008
13 Yujin Nam, Ryozo Ooka, "Numerical Simulation of Ground Heat and Water Transfer for Groundwater Heat Pump System Based on Real-scale Experiment" Energy and Buildings, Vol.42, Issue.1, 2010
14 H.-J.G. Diersch, FEFLOW Reference Manual, WASY GmbH, 2002