Applicability of thermal response tests in designing standing column well system: A numerical study. (15th August 2016)

• Record Type: Journal Article
• Authors: Jeon, Jun-Seo; Lee, Seung-Rae; Kim, Woo-Jin
• Is Part Of: Energy. Volume 109(2016)
• Page Start: 679
• Page End: 693
• Publication Date: 2016-08-15
• Subjects: Standing column well -- Thermal response test -- Parametric study -- Thermal diffusivity -- Enhanced thermal conductivity -- Finite element method; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Energy consumption -- Periodicals; 333.7905
• DOI: 10.1016/j.energy.2016.05.023
• Languages: English
• ISSNs: 0360-5442

Abstract

Abstract: The thermal performance of a standing column well system is sensitive to geological and hydrogeological conditions and is maximized in the conditions of stable groundwater temperature, high well yield, and shallow water level. Intricate heat transfer phenomena in the standing column well system leads to difficulties in establishing unified detailed guidelines for the design, installation, and operation of the standing column well system, and consequently a variety of guidelines exist in different countries. According to the guidelines for the design, installation, and operation of a standing column well system, thermal response tests are conducted in Korea and thermal properties such as thermal conductivity and thermal diffusivity which are essential for the design step are obtained. This article investigated the applicability of thermal response tests in the design of a standing column well system based on a numerical study. Based on the developed standing column well model, a total of 420 scenarios were simulated by varying the thermal, hydraulic, and operation properties, and bleeding rates to evaluate their effects on an enhanced factor. The results show that the applicability of thermal response tests in designing a standing column well system mainly depends on the magnitude of hydraulic conductivity. Highlights: Simulation of the thermal response test for standing column wells was performed. Various thermal, hydraulic, and operation properties were considered. Total of 420 scenarios were simulated for the parametric study. Applicability of TRTs in SCW systems mainly depended on the hydraulic conductivity.