Design and development of a low-cost thermal response rig
01 August 2012
03T13:45:45Z September 2012
A thermal response test (TRT) is a controlled insitu test during which a known quantity of heat energy is injected into a closed loop heat-exchanger pipe while the heat dissipation rate into the surrounding ground is monitored. Results from a test can be interpreted to determine a number of ground thermal parameters with are vital design requirements for any medium to large scale ground source energy system. This paper describes the design and construction of a low cost TRT rig and compares the results obtained from a test using the constructed rig and a commercially built rig in order to evaluate the accuracy of the constructed equipment. The TRT rig is designed in accordance with the following principles: keep construction costs low, improve the cost-efficiency of TRT testing by incorporating remote data transmission capability and ensure attainment of sufficient accuracy to satisfy the design requirements of ground source energy systems. Analysis of data collected by the TRT rigs result in a calculated thermal conductivity of 1.9 W/mK in both cases. This value falls within the range expected for the tested geological formation and confirms the accuracy of both test rigs.
Irish Research Council for Science, Engineering and Technology
Type of Material
Institution of Civil Engineers
Proceedings of the Institution of Civil Engineers - Energy
Copyright (Published Version)
2012 ICE Publishing Ltd.
Subject – LCSH
Renewable energy sources
Status of Item
This item is made available under a Creative Commons License