Geo Green Power Research Update – Efficient GeoTech

GGP are the lead partner in a consortium based research and development project named Efficient GeoTech (EGT).

 EGT is a 3 year project funded by InnovateUK to create a new Ground Heat Exchanger (GHE) which costs less to install and is more efficient. The project will also look at enhancing the soil to aid heat extraction. Combining a heat pump, the improved GHE and enhanced soil should provide a renewable alternative to a gas boiler that has similar installation and running costs.

The EGT project investigations focus on:

  • Use of micro-particles or stabilised earth additive (graphite) to enhance heat transfer in GHEs
  • Different boring techniques and how to combine these with heat transfer enhancement materials
  • Electro-osmosis to increase moisture around ground thermal pipes and improve heat transfer in the ground

Practical working has been carried out at three levels:

  • Laboratory scale development
  • Outdoor lab-scale prototype
  • Full-scale field trial

 EGT is made up of five partners:

  1. Geo Green Power – project lead, supplier and installer
  2. The University of Nottingham – research and theoretical modelling
  3. Environmental Process Systems – prototype research and improvement
  4. Positive Homes – customer/end user
  5. Solar Ready – prototype research and improvement

 Please refer to the EGT website for more details

Currently, EGT is at the full-scale field trial stage of the project. Two new low cost GHEs have been installed at our premises. One GHE has soil enhancement material (test) and the other doesn’t (control). The results from each GHE will be compared to determine the benefit of using soil enhancement materials.

UK Research and Innovation is a new organisation that brings together the UK Research Councils, Innovate UK and Research England into a single organisation to create the best environment for research and innovation to flourish. The vision is to ensure the UK maintains its world-leading position in research and innovation. For more information visit

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