On Wednesday and Thursday 4th & 5th November, We Held Our GA#6!

The GEOFIT consortium successfully held our 6th General Assembly (GA) on November 4th and 5th, 2020, hosted remotely by R2M Solution. Important progress has been carried concerning the design of the GEOFIT systems to be installed in each of our five pilots. And although we are facing some delays during this installation phase due to the COVID-19 sanitary situation, the geothermal field in the school of Sant Cugat has been completed during the summer and installation at other pilots is planned to start before the end of the year.

Drilling and civil works for the horizontal connection to the plant room in Sant Cugat pilot (AJSC)

During the two-day meeting, we discussed the progress of our work and individual Work Packages, putting special focus on the pilots’ progress. The project moves in the right direction and the work is getting more advanced.

Among the progress included in the partners’ presentations, overviews on the last decisions made regarding the Bordeaux and Galway pilots were shown by NUI GALWAY and NOBATEK, progress on the engineering design tool for ground heat exchangers was shown by GROENHOLLAND, as well as how the GeoBIM platform is being implemented by IDP in the more advanced demo-sites, Sant Cugat and Perugia.

Two workshops were also organized during the GA, the first one to discuss the life cycle approach within the project context, led by EURECAT, and the second one to start analyzing the pilot business cases and discuss why Geothermal is an appealing technology for building retrofitting, led by R2M.

The meeting closed by setting up the next steps and plans for the upcoming six months.

We did a great job!

Design Requirements for Condensation-Free Operation of High-Temperature Cooling Systems in Mediterranean Climate

Article pulished in Building and Environment (2020)

Title: Design Requirements for Condensation-Free Operation of High-Temperature Cooling Systems in Mediterranean Climate

Language: English

Authors: Henrikki Pieskä (*1) , Adnan Ploskić (*1,2), Qian Wang (*1,3).

*1: Division of Sustainable Buildings, School of Architecture and the Built Environment, KTH Royal Institute of Technology, Brinellvägen 23, SE, 10044, Stockholm, Sweden
*2: Bravida Holding AB, Mikrofonvägen 28, SE, 12637, Hägersten, Sweden
*3: Uponor AB, Hackstavägen 1, SE, 72132, Västerås, Sweden

Abstract: Radiant cooling systems are a subject of increasing scientific interest due to their efficiency and ability to use high-temperature cooling sources. In hot and humid conditions, they have generally been studied in combination with dehumidification systems. For retrofit projects, a control system that would eliminate the need for dehumidification would be beneficial. In the present study, a passive geothermal-based radiant high-temperature cooling system is studied in a Mediterranean climate. The system is operated with supply water temperature control using dew point temperature as a controlling variable. The system’s performance is compared with that of an all-air cooling system. The systems are evaluated using IDA-ICE building energy simulations, validated with on-site measurement data. The results show that the radiant cooling system produces the same level of thermal comfort with 40% lower energy use and 85% lower exergy consumption than the all-air system. The risk of condensation limits the cooling capacity of the radiant cooling system. Consequently, insufficient cooling capacity causes thermal discomfort for the occupants due to the operative temperature exceeding 26 ◦C.

The GEOBIM Platform

In the GEOFIT project, heating and cooling components design and integration are developed for the different layouts and demo-sites and comprise a detailed design and description of the different subsystems or components to form a complete system. Key elements and components, as well as their specifications, are being developed and inventoried as part of the GEOFIT project activities. As in previous work, the deployment of low-invasive risk assessment, site-inspection, and worksite-building monitoring techniques extend its use as a monitoring tool for geothermal based retrofitting operations and deploy novel tools enabling the view of assets in a cartographic or a geographical environment and comparing with the information stored into GIS collectors and the Web Map Services (WMS). A common data environment containing GIS/BIM models/sensor data allows users to locate, map, update and share objects and subsurface utility information simultaneously, contributing to the realization of a new “GEOBIM platform”. The objective of the GEOBIM platform is to assess and verify the integration of the GEOFIT solutions in specific cases developing the respective different BIM models over a geographical information layer, aiming at replication and modularity of the solutions, outputs for exploitation, impact assessment, and dissemination of the results. The implementation of the previously defined system is addressed for buildings with different typologies and energy demands. Then, integration of the conditions and the building’s engineering specifications are defined within the GEOBIM platform.

The GEOBIM platform considers the scalability and flexibility of the data integration and analysis tools development to support interoperability among the elements installed. The design inputs come from:

    1. Boreholes and ground excavations information
    2. Geothermal heat exchangers designs
    3. Ground source heat pumps designs
    4. Heat pumps designs
    5. Heating and cooling systems designs
    6. Sensors information
    7. Simulations data

By covering the 7 dimensions of the #BIM approach, the GEOBIM platform implements the following functions:

  • Project visualization
  • Data management
  • Demo-site analysis functions
  • Geothermal performance
  • Heating/Cooling performance
  • GEOFIT assets management
  • The lifecycle of systems and assets

Within the GEOBIM platform development (understood as a common data environment), model-based cooperation is the advanced portrayal of the general GEOFIT development process. This portrayal is made in collaboration with the different partners involved in the design, modeling, construction/fabrication, installation, and commissioning, who utilize different CAD-based tools. The Common Data Environment (CDE) is characterized as a typical advanced task space, which gives very much characterized collaborative territory to the undertaking partners joined with clear status definitions and a strong work process portrayal for sharing and endorsement forms and objects data.

Written by Sergio Velasquez, from IDP

Want to learn more?

Click on this link to have a look a the 10 Geobim videos posted on the project’s Youtube channel and thank you for watching!

Videos produced by COMET


BS Rome – IBPSA Paper (2019)

Presentation of GEOFIT at BS ROME – 16th IBPSA International COnference and Exhibition (2019)

Title: Environmental sustainability and Energy Efficiency in Historical Buildings: GeoFit Project Implementation in the Case Study of a medieval fortress in Perugia

Language: English

Authors: Jessica Romanelli (*1), Matteo Di Grazia(*1), Cristina Piselli (*1,2), Anna Laura Pisello (*1,2), Franco Cotana (*1,2)

*1: CIRIAF – Interuniversity Research Centre, University of Perugia, Italy
*2: Department of Engineering, University of Perugia, Italy

Abstract: Italian cities are mainly constituted by buildings constructed until the mid-20th century by pre-industrial construction techniques. A HVAC system for the energy retrofit of historical buildings is evaluated when applied in the case study of Sant’Apollinare. It consists of a ground source heat pump a water tank for thermal energy storage connected to a low-temperature radiant system and air handling unit. The building thermal-energy behavior, typically influenced by thermal inertia in historical buildings, and the novel HVAC system performance interactions are comparatively assessed together with more traditional scenarios. Energy demand decreases by about one third compared to the pre-retrofit situation.