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Modeling on the Performance of Standing Column Wells During Continuous Operation Under Regional Groundwater Flow

Title
Modeling on the Performance of Standing Column Wells During Continuous Operation Under Regional Groundwater Flow
Author
이근상
Keywords
Standing column well; Thermohydraulic evaluation; Continuous regime; Numerical simulation; Groundwater flow
Issue Date
2011-05
Publisher
TAYLOR & FRANCIS INC, 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
Citation
INTERNATIONAL JOURNAL OF GREEN ENERGY; 2011, 8 4, p474-p485, 12p.
Abstract
Coupled hydrogeological-thermal simulation of the standing column well (SCW) system is essential to provide an optimized configuration and operation schedule for boreholes on the site. This paper presents numerical investigations and thermohydraulic evaluation of SCW system operating under continuous flow regime. A three-dimensional numerical model for groundwater flow and heat transport is used to analyze the heat exchange in the ground. 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, and four periods per year to simulate the seasonal temperature conditions. For different parameters of the system, performances have been evaluated in terms of variations in the recovery temperature. The calculated temperatures at the producing pipe were relatively constant within a certain range through the year and fluctuating quarterly a year. Pipe-to-pipe distance, injection/production rate, ground thickness, and permeability considered in the model are shown to impact the predicted temperature profiles at each stage and the recovery water temperature. The influence of pressure gradient, which determines the direction and velocity of regional groundwater flow, is also substantial.
URI
http://www.tandfonline.com/doi/abs/10.1080/15435075.2011.576290
ISSN
1543-5075
DOI
10.1080/15435075.2011.576290
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > EARTH RESOURCES AND ENVIRONMENTAL ENGINEERING(자원환경공학과) > Articles
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