This working group addresses task 2 through evaluating the energy performance of several buildings and infrastructure components where thermoactive geostructures have been implemented and results from numerical modelling studies.

Different numerical and analytical approaches can be utilised and compared.

Factors that affect the performance and lead to differences in overall response of similar systems will be determined: energy needs of the buildings and the infrastructures, ground conditions, execution, etc. The relative importance of ground properties (water content, saturation, mineralogical content, grain size distribution, and water flow) in determining the thermoactive geostructure behaviour will be identified.

This WG will also collaborate with WG1 for the in situ thermal characterisation of thermal geostructures to establish heat transfer requirements for meeting building energy performance needs.

Another objective, in collaboration with WG3, is technical assistance in devising methods for optimal heat transfer between structure and ground, in terms of materials, geometries and layouts.

There are the scientific reports during short term mission :

-Validation of thermal response testing of energy piles for the estimation of the thermal properties of the ground and the pile thermal resistance.

-Experimental validation of a thermal model of pile heat exchanger

Factors affecting the energy efficiency of energy diaphragm walls:

-Statistical analysis

-Numerical modeling

-Legislative framework on Shallow Geothermal Energy in Europe, in the spectrum of the Welfare State

 

WG2  Energy performance assessment

 

WG Lead : Dr Alice DI DONNA

Vice Lead : Dr Apostolos MICHOPOULOS

Webmaster Françoise Dudouyt IFSTTAR 

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