Coefficient of performance and heating and cooling thermal performance characteristics using a standing column well and cross-mixing balancing well heat exchanger methods

• Main Authors: Kyoungbin Lim, Changhee Lee
• Format: Article
• Language: English
• Published: Elsevier 2021-11-01
• Series: Energy Reports
• Subjects: Standing column well (SCW); Thermal response test; Effective thermal conductivity; Bleeding rate; Thermal conductivity; Balancing well
• Online Access: http://www.sciencedirect.com/science/article/pii/S2352484721001700

The technology proposed in this study aims to improve the performance characteristics and coefficient of performance (COP) of a geothermal system by fundamentally preventing underground water discharge and maintaining a constant temperature of the underground heat exchanger composed of bleed discharge water that utilizes two balancing wells using cross-mixing methods. The results of measurements using this technique show that the change in operation from a regular SCW-type heat exchange system to a well-intersected heat exchange system not only improves the COP of geothermal heating and cooling systems, but also ensures a stable supply of geothermal sources. This result is useful for essentially eliminating the ultimately wasted bleed water.