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hybridGEOTABS first newsletter (March 2017) online

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hybridGEOTABS newsletter (first page)

hybridGEOTABS first newsletter contains a short introduction to the technology and objectives of the research project. It also gives a summary of progress as shared at the recent project meeting in Finland, in particular, the chosen demo buildings and technical developments.


GEOTABS is an innovative clean technology for energy efficient and healthy buildings combining thermally activated building system (TABS), a ground heat exchanger and heat pump in between both systems (GEOTABS). The radiant heating and cooling system has proven to be one of the most comfortable ways to condition indoor spaces, especially multi-storey offices.


hybridGEOTABS is an active research project to optimise the predesign and operation of a hybrid combination of geothermal heat pumps (GEO-HP) and thermally activated building systems (TABS). It will design an improved, automated ‘Model Predictive Control’ (MPC) solution for testing on hybrid supply and emission systems in demonstration buildings such as offices, elderly care homes, schools and apartment blocks. Applying MPC to hybrid GEOTABS optimises the performance and efficiency, making it more economically attractive and increasing take up.


On 1-2 March the project team met in Vantaa, Finland, hosted by Uponor. Three demonstration and two case study buildings were chosen. 


Demo buildings are equipped with a GEOTABS system and will be used to experiment, monitor and demonstrate the systems developed in the project (eg the MPC controls):

  • Solarwind office, Luxembourg: 120kWthGSHP system.
  • Ter Potterie care home, Belgium: 186kWthGSHP system.
  • Libeznice school, Czech republic: 55kWth(heating mode), 65kWth (cooling mode) GSHP system.


Case-study buildings are equipped with a system similar to GEOTABS and provide additional information and monitoring:

  • Haus M residential, Switzerland: 75kWthgeothermal HP system with underfloor heating
  • Infrax office, Belgium: 2x geothermal HP (70kWth each)


Technical developments within the project include:

  • A design method for the control of hybrid systems has been developed which will lead to the development of an 'automated splitting algorithm' to determine baseload versus secondary loads for heat demand.
  • Four typologies are being developed to determine load curves for schools, offices, residential and care homes across Europe.
  • A semi-automated MPC toolchain is being created - using a white box approach based on Modelica & IDEAS library.


The complete hybridGEOTABS newsletter is available at this link


See also the relevant BUILD UP Publication.