MPC-Geothermie - Implementing Borehole Heat Exchanger Fields in Building Automation Systems by Means of Model Predictive Control

 

In recent years, more and more buildings have been equipped with complex energy systems utilizing borehole heat exchanger (BHE) fields as a main heating and cooling source. In practice, many installed BHE fields are not optimally operated leading to an inefficient or even unsustainable use.

For exploiting the full potential of both existing and future BHE fields and for ensuring their sustainable use, we will develop a generic method for planning and implementing operation strategies for BHE fields. First, we will test and validate the developed method using the BHE field of the E.ON Energy Research Center (E.ON ERC). Subsequently, we will further develop it for arbitrary BHE fields and buildings.

With this project, we aim at including the consideration of the thermal state of BHE fields in building automation systems and, thus, closing the gap between planning and operation of BHE fields.

The planned integration of BHE-fields into the building automation system is based on the prediction of their short- and long-term behaviour by simulating heat transport both in the geothermal heat exchangers and in their environment numerically and analytically. For this purpose, we utilize and further develop SHEMAT-Suite as well as analytical modelling approaches.

In this project, we collaborate with the Institute for Energy Efficient Buildings and Indoor Climate (EBC) and two companies: Geophysica Beratungsgesellschaft mbH and DEOS AG. We are grateful for the funding by BMWi (Bundesministerium für Wirtschaft und Energie).

  MPC-Geothermie Urheberrecht: GGE Figure: Temperature distributions around a borehole heat exchanger (BHE) during the heating phase (starting from the undisturbed temperature distribution at 1st of January), simulated with SHEMAT-Suite (in 3-D)

 

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