Calculation Tool for Effective Borehole Thermal Resistance
Paper in proceedings, 2016

This paper presents a tool for computing thermal resistance of single U-tube ground heat exchangers placed in vertical boreholes. The tool is complete in the sense that it can compute both local and effective thermal resistances for either grouted or groundwater-filled boreholes. For grouted boreholes, it utilizes the highly accurate multipole method. For groundwater-filled boreholes, it utilizes recently-published convection correlations. Thermal property routines for water and water-antifreeze mixtures allow calculation of the interior convective thermal resistance for a wide range of cases.

Ground heat exchangers

Borehole thermal resistance

Ground source heat pumps

Author

Jeffrey Spitler

Saqib Javed

Chalmers, Civil and Environmental Engineering, Building Services Engineering

Rachel Grundmann

Proceedings of the 12th REHVA World Congress (Clima 2016), May 22-25, Aalborg, Denmark

Driving Forces

Sustainable development

Areas of Advance

Building Futures (2010-2018)

Energy

Subject Categories

Energy Engineering

Energy Systems

Building Technologies

More information

Created

10/8/2017