This section provides downloads and links to articles, papers, reports and diagrams, plus relevant and related guides.
The project deliverables will also be accessible here, and shall be added to whilst the project progresses.
File size: 11mb
Authors: Wim Boydens, Lieve Helsen, Bjarne W. Olesen, Lukáš Ferkl, Jelle Laverge, with contributions from a number of our partners.
Edited by Eline Himpe
Download the Manual here
After much work and putting together the culmination of four years work on the H2020 project, and many more to get to that. Read about the history of GEOTABS, research and results, to the combinations of renewables, storage and GEOTABS to create a hybridGEOTABS building.
The manual is available in print, as well as a PDF.
File size: 6mb
File size: 13mb
File size: 3mb
On 18th November our partner, Dr. Eline Himpe (Ghent University), introduced and presented our project to the UK division of the BEIS/IEA Heat Pump Meeting.
It was positively-received and clear in explaining project, concept and future plans for hybridGEOTABS and our planned manual, webtool and Knowledge Centre.
The slides are available to download and read below.
Download the slides here
Activating the thermal mass of a building by implementing Thermally Active Building Systems (TABS) assists in reducing energy use for thermal management of buildings by utilizing a low temperature heating and high temperature cooling approach. Coupling TABS with geothermal heat pumps that use low-grade energy source in addition to model-based predictive control (MPC) helps to further decrease energy use. Most equipment in hybrid GEOTABS buildings follow a modular structure that can be classified as low, medium and high temperature sources, and emission systems depending on the building type and needs. This work describes the main characteristics of the individual modules and interfaces of hybrid GEOTABS buildings, and provides examples of three types of buildings that use the hybrid GEOTABS approach. These buildings are an elementary school in the Czech Republic, an elderly care home in Belgium, and an office building in Luxembourg. Although these buildings are functionally different, the generic hybrid GEOTABS concept can be abstracted based on a detailed consideration of the interaction between energy transfer systems (e.g. geothermal heat exchangers, heat pumps, boilers) and emission systems (e.g. TABS, air handling units, radiators, domestic hot water). This work defines the generic concept, individual modules, and interfaces between related components of hybrid GEOTABS, enabling the specification of a design template with a “minimum” number of required operational parameters. Such a template can enable fast sizing of major system components, consistency between design-build offers, and facilitate effective integration of the Hybrid GEOTABS into new buildings.
File size: 2mb
Model Predictive Control (MPC) predictive’s nature makes it attractive for controlling high-capacity structures such as thermally activated building systems (TABS). Using weather predictions in the order of days, the system is able to react in advance to changes in the building heating and cooling needs. However, this prediction horizon window may be sub-optimal when hybrid geothermal systems are used, since the ground dynamics are in the order of months and even years. This paper proposes a methodology that includes a shadow-cost in the objective function to take into account the long-term effects that appear in the borefield. The shadow-cost is computed for a given long-term horizon that is discretized over time using predictions of the building heating and cooling needs. The methodology is applied to a case with only heating and active regeneration of the ground thermal balance. Results show that the formulation with the shadow cost is able to optimally use the active regeneration, reducing the overall operational costs at the expenses of an increased computational time. The effects of the shadow cost long-term horizon and the predictions accuracy are also investigated.Download the paper here