Cheap-GSHPs Newsletter 5


This fifth issue of the newsletter reflects the progress achieved by the project between January 1st, 2018 until June 30th, 2018.
CHEAP-GSHPs project has received funding from the European Union’s Horizon 2020 Research and Innovation Programme under grant agreement No. 657982. The project will run for 48 months, from June, 1st, 2015, until May 31st, 2019.

Cheap-GSHPs Project News

Software development

One of the main barriers for the promotion of Ground Source Heat Pump technology is related to the uncertainty in the sizing and design of the ground source heat exchangers field. For this purpose a freeware tool has been developed in the project Cheap-GSHPs, in order to facilitate the design of the ground source heat exchangers and hence to allow a penetration of low temperature geothermal systems. The freeware design tool has been based on the same common platform of the Decision Support System developed in WP5, thus guaranteeing interoperability between the two pieces of software.

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Cheap-GSHPs Web Platform

The Cheap-GSHPs Web Platform represents the Cheap-GSHPs Decision Support System View module. The document includes an overall description of the system architecture, the workflows followed by the different modules developed and the definition of the interfaces between the Web Platform and the rest of components of the Cheap-GSHPs DSS. Besides, the document shows the user interface obtained, with a description of the different pages developed in the platform.

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Cheap-GSHPs DSS and web platform user manual

The user manual of the web-based Decision Support System developed in the project presents the instructions for creating a user account, accessing the site, creating and configuring projects and also the indications of how to interpret the results provided by the website.

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Evaluation of performance in demonstration site No 1: Demo Site at the Polytechnic University of Valencia

This report describes the design, validation and assembly of the advanced geothermal laboratory at UPV and the in-depth analysis of the thermal experiments carried out to verify the thermal efficiency of the new borehole heat exchangers developed within the project. This report is aimed at researches and engineers interested in methodologies of thermal behavior of borehole heat exchangers.

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Evaluation of performance in demonstration site No 2: Bioclimatic office building of CRES

This report presents the test results of the demonstration site of CRES in Pikermi, Greece. There, existing open loop ground source heat pump (GSHP) system was retrofitted by a GSHP supplied by four BHEs, one helicoidal developed during the in WP2, Task 2.2 “Study, simulation and development of geometries of ‘heat basket type’ GSHEs to fit with borehole diameters of 325 mm”, one coaxial developed in WP3, Task 3.3 “GSHE material developments”, as well as one single-U and one double-U BHE for comparison. In addition the new drilling equipment developed during WP3, Task 3.1 “Development of a rotating and vibrating machine head for penetrometers” was tested under various drilling conditions. An online monitoring system was installed which allows real time data recording. The monitoring system includes temperature sensors, flow meters, thermal energy meters, pressure transmitters and electrical energy analyzers for data acquisition, as well as interfaces and PC based data management.

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Evaluation of performance in demonstration site N°3: Residential house, Belgium

This report presents the installation of three different types of Ground Source Heat Exchangers, their connection to the heat pump and the realization of a monitoring system. This document then covers the evaluation of the drilling methodologies and the performance of the Ground Source Heat Exchangers in this residential house. The main objective of this task was to install newly designed coaxial heat exchangers using the CHEAP-GSHPs innovative drilling methodology for coaxial Ground Source Heat Exchangers.

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Evaluation of performance in demonstration site No 4: Test site Erlangen, Germany

The report presents the test results of the demo site in Erlangen-Eltersdorf. There, four helicoidal GSHEs developed in WP2, Task 2.2: “Study, simulation and development of geometries of ‘heat basket type’ GSHEs to fit with borehole diameters of 325 mm” are installed and equipped with a huge amount of monitoring sensors to gather data. Further, for the installation of the GSHEs a new drilling technique, developed in WP2, Task 2.3: “Improving of the drilling/installation technologies starting from easy drill concept in combination with the heat basket type or helix type of GSHE of larger diameter” was tested on this test site. The heat exchanger shows a good performance and provides a good solution for areas with drilling restrictions in terms of depth and where shallow ground water tables should stay untouched. The used technique “enlarged easy drill” is already highly efficient in fine grained unconsolidated sediments and has the potential to be extended to more complex geological conditions with further technical improvements.

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Evaluation of performance in demonstration site No 5: University College Dublin, Ireland

The main objective of the task performed at this demo site was to install a helicoidal and coaxial heat exchanger using the Cheap-GSHPs drilling machine with conventional drilling technologies. The case study site location provided an opportunity to retrofit and connect the new BHE technologies to an existing heat pump installed in 2010. The system is used for space heating of an existing office building on the campus of University College Dublin. The report presents the details of the planning, design and installation of the coaxial and helicoidal heat exchangers as well as the construction, testing and monitoring phase of the system.

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Life Cycle Analysis for each of the developed technology and the comparison with the traditional one

This study presents the results of the environmental analysis with a life cycle perspective for very low temperature geothermal installations developed within the Cheap-GSHPs project. The study includes the analysis of the six real case studies of the Cheap-GSHPs project. The case studies are located in Spain, Greece, Germany, Belgium, Croatia and Ireland, providing a wide view of different climate conditions and underground typologies. Within the study 10 environmental impact categories have been analyzed and two energy performance indicators have been calculated. All together provide a lot of information about the environmental and energy performance of the systems under study. Moreover, the study includes a comparison of Cheap-GSHPs real case studies results with (1) other traditional geothermal systems and (2) other thermal technologies.

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Report on Standards Recommendations

The main objective of this task was to build on the identification of applicable standards relating to the ground heat exchanger, drilling equipment and installation, heat pumps as well as historical buildings considered in the Cheap-GSHPs project as part of the D7.6 in M18 of the project. The analysis of the applicable standards and the development of the Cheap-GSHPs project technologies, has highlighted terms in the text of the standards that are perceived as potentially inhibiting the route to market of the innovative technologies.

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Business Model Report

This document contains the development of five business models based on the Canvas methodology, one for each technology developed within the CHEAP project and a model based on an integrated solution oriented to a final use called CHEAP GSHPs business platform.

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Third report on Training, Education and dissemination activities

This report is a synthesis made by the WP9 leading partner on the basis of partners' individual reports elaborated in May 2018. The partners' reports were done according the Cheap-GSHPs project strategy and reporting format set up to the 30th of November 2015. The report covers the third year of the project (June 2017 - May 2018). The reference document for this report is the TED Plan included in D9.3 “Report on Training, Educa-tion and Dissemination Plan" that was finalized and delivered in November 30th, 2015. TED Plan was continuously updated by the partners in the first three years of the project.

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Multi-parameter geothermal mapping

The method for creating maps providing the cost of GSHP systems expressed in €/kW started with an empirical method, by collecting data from other tasks and WP. In particular, data from Task 1.1, 1.2, 1.3, 1.4 were collected and homogenized in order to provide an overview of geological, climatic and energetic characteristics across Europe. Data from Task 2.1, 3.4 and 3.5 was used as reference basis for costs calculation. This data was the basis for the execution of a large amount of numerical simulations, which could correlate ground surface temperature, thermal conductivity and required BHE length for given energy demands (referential building types of Task 1.4). A first set of numerical simulations was performed for actual state double-U HE of Task 2.1, while a second set was performed for a large coaxial HE developed by Cheap-GSHPs, reported in Task 3.5 in order to subsequently compare the economic improvements on a spatial basis.

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Evaluation of the performance due to the use of nanofluids

Nanofluids are colloidal suspensions of nanoparticles (as oxides, metals or carbon) in common fluids (as water, oil, ethylene glycol or refrigerants). In the literature, there are several studies on the use of these fluids either as thermal vectors, even in geothermal applications, or as compressor lubricants in HVACR applications. As thermal vectors, they promise to improve the heat transfer and thus the energy efficiency of the system by enhancing the thermal conductivity and the heat transfer coefficient of the base fluids. As lubricants, they could enhance the tribological properties, in particular the lubricity, determining higher reliability and duration of the machine and lower energy consumption. After a preliminary search in the open market, some fluids (both heat transfer fluids and lubricants) have been selected for aims of the project. The selection was focused on commercial nanofluids in order to get easily available fluids and at accessible costs.

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Cheap-GSHPs Dissemination Events

Events happened between January 1st, 2018 – June 30th, 2018

Cheap-GSHPs Publications

Cheap-GSHPs Project Partners

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