D4.1 – Options and selections of heating/cooling components for geothermal retrofitting

This report provides description of the modelling work conducted on the pilot sites of Perugia and Sant Cugat. The pilot sites, the studied heating and cooling systems and the used modelling software are described. Suggested low temperature heating and high temperature cooling system designs are simulated and in the case of Sant Cugat, the results are compared with the current situation and a comparable alternative. The results are presented and discussed.

In the pilot site Perugia, the model was created to be used as a design tool by other partners in the project. In the pilot site Sant Cugat, the simulations show that for the primary school a low temperature heating system coupled with mechanical ventilation would improve indoor air quality with heating demand similar to the current system. For the sports pavilion a clear preference could not be established. The results also show that a high temperature cooling system would be a viable alternative for the administrative building and drastically reduce thermal discomfort. Finally, it was found that a comparative state-of-the-art all-air system that would achieve similar comfort would result in higher heating and cooling demand in all cases. The future works in this task will include work on the Aran Islands pilot.

D3.2 – Ground Source Heat Exchanger design framework

The goal of WP3 is to develop a design framework for novel ground (slinky/earth basket) type shallow heat exchangers. This design framework, based on developing theoretical models of heat transfer and on experimental data, will be implemented in a design- and engineering calculation tool to support the implementation of these new technologies in the market.

The design framework defines the goals of the (thermal and hydraulic) design (especially sizing) of the ground source heat exchanger, as a function of different boundary conditions (building energy demand, soil thermal parameters, required system performance etc.). Moreover, an engineering tool it is aimed at the overall system design and will support the engineer in the choices of heat exchanger technology (vertical, horizontal or earth basket/slinky) and other design parameterizations.

This deliverable describes the overall design process and provides information and procedures for data collection and evaluation. The detailed description of the design process for different types of Ground Heat Exchangers is based on the design of the actual GHEX systems implemented in the demo sites of the Geofit project and includes vertical borehole heat exchangers, shallow slinky heat exchangers and earth basket type heat exchangers.

This deliverable is suited to be implemented in a design handbook or procedure that can be part of an integrated quality control system.

D3.1 – Design methodologies strengths and weaknesses

In this deliverable the main fundamental processes of heat transport relevant to the ground heat exchangers have been described. For the purpose of the project, only heat transport due to conduction will be considered in detail.

There is abundant literature concerning methods to calculate the thermal response of ground heat exchangers and design. Using a few selected references an introduction to analytical and numerical methods is presented. A description of the different implementations of analytical and numerical modeling and design software codes is presented as well.

The different methods are classified for strengths and weaknesses based on criteria including methodology, complexity, number of input parameters required, processes considered, flexibility with regard to geology and parameters relating to the actual ground heat exchanger. The aim has not been to arrive at a ranking, but only at an overview of the capabilities of the codes and the ease or complexity of use. Cost is of course also an important aspect but is currently not included.

Based on the overview of different methodologies and implementations a roadmap for the development of the GHEX engineering tool within the work package has been defined. This roadmap is based on the expertise of the different partners and works from a detailed level, using the results to derive simplified models that can be integrated into a final engineering design tool.

D2.1 – Geothermal – IDM for Drilling Processes

This document (D2.1) states the Geothermal Information Delivery Manual (IDM) for drilling processes involved in the GEOFIT project. The IDM for drilling processes specifies an integrated reference tool to collect the information and data from the different processes involved during drilling operations performance required by the GEOBIM model proposed in the project. The specification of an IDM for GEOFIT project and the need of providing an integrated model for drilling processes is one of the main outcomes of this deliverable as it is a very complex environment. The data acquisition processes and data workflows are produced in real time conditions and different data formats may be found. Within the GEOBIM project context, the IDM is aimed at providing the unified reference for the processes and data required by BIM by identifying the discrete processes that must be undertaken during drilling operations, the information required for their execution and the results obtained from these operations. In general terms, this IDM represents a real challenge because it must specify:

  • How drilling processes fit the global GEOBIM model and how relevant they are;
  • Who are the actors creating, consuming and benefitting from the data collected during drilling;
  • What is the final valuable information created and to be used;
  • How this amount of data shall be supported by virtual tools and software.

D1.3 – Simulation List of Interoperability Issues

Building retrofitting using geothermal equipment is a complex problem involving multiple thermal systems. At the design step, engineers need to evaluate building thermal performance, to size heating/cooling emission components, to design the Ground Sourced Heat Pump, etc. During operational and post occupancy steps, models are required to validate the performance of the design, or to perform fault detection to facilitate maintenance. Most of these tasks require numerical models to perform prediction or to guide the decisions.

The GeoFit project gathers a lot of partners with strong knowledge in different technologies. The Research and Development tasks are split in several work packages according to the different parts of the global system (building envelope, heat pump, ground heat exchanger, Building Energy Management System). For each work package, partners bring, or develop specific models that help the design, or assess the performance of the future building. A total of 6 main models has been identified and are presented in this document.

In order to have a global picture of a retrofitting project, most of the models will have to collaborate, or to exchange information. Therefore, this document has 3 objectives:

  • To give an overview of all the numerical models developed in GeoFit: their purpose, their complexity, the required inputs and the desired outputs.
  • To “place” the models in a typical retrofitting design process: when a model should be used, and what are the required information to perform simulation.
  • To show the level of interaction between the models: describe which model requires input from another model, or which model need to collaborate or to perform “cosimulation”.

Finally, the last chapter describes how these models will be integrated in the GeoBIM platform.

D1.2 – Detailed guidelines of the processes to be developed for the general geothermal based retrofitting solution: Workflow and dataflow.

This deliverable presents detailed guidelines to be developed for the general geothermal based retrofitting solutions: workflows and data flows. It consists in the implementation within a project delivery organization of the principles detailed in the previous deliverable (D1.1: Description of the general IDDS framework). It is also used as a basis for identifying the data that will be shared between the different actors during the different design stages. These works particularly useful to ensure the interoperability of models which is covered in the deliverable D1.3. It also provides the global basis to develop the BIM Execution plan in WP6.

After a reminder of the main stakeholders categories and stages of a retrofitting project, several workflows are presented to explain the specificity of IDDS approach for the GEOFIT solutions, compared with “business as usual” methods.

More detailed elements about the implementation of IDDS in a practical project are shown in a more detailed workflow based on the example of the French demo site.

These guidelines are to be adopted by GEOFIT demonstrations, but are also aimed to inspire further projects beyond GEOFIT.

D1.1 – Description of the general IDDS framework and collaborative organisation for GEOFIT project

This deliverable aims first to highlight the different approaches of integrated design & delivery methods, based on different roles and responsibilities for both suppliers and clients, including all the technical fields involved in the process of a geothermal system development (drilling processes, Building Information Modelling (BIM) platform design, HVAC system design, heat exchangers (HEX) component design, building integration, etc.).

The GEOFIT project aims to foster collaboration in the building value chain. This will be achieved by leading a collaborative project delivery in retrofitting projects, in terms of energy, cost efficiency and overall sustainability in order to minimise risks, optimise costs and avoid failures.

The outcomes of this deliverable will provide a solid basis for other tasks in the project, especially about:
• Collaborating people: the workshops proposed here initiate and provide guidelines for the collaborative work among the stakeholders of each GEOFIT retrofitting site, similarly to what could be ideally done in a real-world implementation of and IDDS framework in an energy retrofitting project.
• Integrated process: General workflows and data flow for the demonstration activities, to be adapted and detailed later for each demo site context and specificities.
• Interoperable technologies to be adapted to any geothermal retrofitting context: sets of models used during the integrated design process (selection of the models, description of the corresponding methods, coupling and interactions).

D10.4 Communication Materials

This document (D10.4) contains the set of GEOFIT public communication materials established for M6.  As the corporate identity with the GEOFIT logo was already included in the GEOFIT Dissemination and exploitation strategic plan (D10.1, M3) and the GEOFIT website was also previously launched and described in deliverable D10.3 (GEOFIT Public website), the communication materials included here
are as follows: the project presentation, the poster, the brochure, the press kit and the social media. The communication materials themselves can be downloaded from the results area while this document details their description, with the corresponding screenshots.