Innovative Renewable Solutions for European Buildings

Together with SCORES and GEOFIT, HYBUILD will participate to the upcoming World Sustainable Energy Days online Conference.

Our joint workshop will highlight some of the key innovative technologies being developed and tested through the participating projects. For HYBUILD, this will include a focus on the following ones :

  • Advanced PCM (Phase Change Material) thermal storage modules for direct integration in the refrigerant cycle;
  • DC (Direct Current) bus controller solution for heat pump market;
  • Innovative adsorber: Adsorption Heat exchanger with high surface area. 

Join us to learn more ! Register at

Renewable Heating and Cooling Solutions for Buildings and Industry: workshop report

The workshop Renewable Heating and Cooling Solutions for Buildings and Industry at Sustainable Places 2020 brought together a selection of H2020 EU-funded projects involving experts from the biomass, geothermal, solar thermal, and heat pump sectors to discuss a common strategy for increasing the use of renewable energy technologies for heating and cooling for buildings and industry.

Workshop report now available at

European Researchers Night in Greece

The National Technical University of Athens (NTUA), the oldest and most prestigious educational institution of Greece in the field of technology presented HYBUILD during the #EuropeanResearchersNight 

NTUA’s presentation was focused on decentralized thermal systems for the production of electricity, heat, and/or cooling, from renewable energy sources and waste heat from various processes.

You can watch the video from the Researcher’s Night and NTUA’s Prof. Dr.-Ing. Sotirios Karellas’ presentation (less than 4 minutes), below:

HYBUILD at the Researchers’ Night 2020 in Lleida, Spain

On November 27th, HYBUILD was presented at the #EuropeanResearchersNight 2020 by our partner University of Lleida, GREiA Research Group.

The European Researchers’ Night, funded under the Marie Skłodowska-Curie actions (MSCA), is a Europe-wide public event that brings researchers closer to the public. The Night provides researchers the opportunity to showcase the diversity of science and its impact on citizens’ daily lives, and to stimulate interest in research careers – especially among young people. The events highlight how researchers contribute to our society by displaying their work in an interactive and engaging forum.

Within the events celebrated this year (under the EU funded project EuNightCat20 – GA 954506), specific HYBUILD content such as posters were developed for this participation, with the aim to make HYBUILD research and results accessible for a wide audience.

Examples are provided below, and further information can be found on the ‘Europe’s corner’ as well as on the ‘Our Research’ page of the event.

Continue reading “HYBUILD at the Researchers’ Night 2020 in Lleida, Spain”

HYBUILD at the ENOVA-conference

Our partner AIT – the Austrian Institute of Technology – contributed to a national workshop on Thursday, 26th of November 2020, at the ENOVA-conference.

The aim of the workshop was to identify and rank market barriers for “comfort climate boxes” (integrated heat pump solutions) with national stakeholders. This work is part of the IEA HPT Annex 55, where HYBUILD was already presented back in June this year.

The HYBUILD Continental System was presented as part of the contribution to this event.

Further details about this work: contact our colleague Johann Emhofer – AIT

Renewable Heating and Cooling Solutions for Buildings and Industry Workshop at Sustainable Places 2020

On 29th October 2020, HYBUILD organised and contributed to the largest workshop of Sustainable Places 2020 with 14 other sister-projects. Watch again the recording of this session !

Participating projectsSWS-Heating – HYBUILD – CREATE – TRI-HP – HYCOOL – SHIP2FAIR – SUNHORIZON – Heat4Cool – GEOFIT – SCORES – Innova microSolar – Hybrid BioVGE – RES4BUILD – SolBioRev – FRIENDSHIP

Chair of the workshopAndrea Frazzica (CNR ITAE) 
Participating European Commission representative: Olga RIO-SUAREZ, Policy Officer, DG Research & Innovation

Further details about this workshop at

Integrated Storage Systems for Residential Buildings at Sustainable Places 2020

On 29th October 2020, HYBUILD participated to the Integrated Storage Systems for Residential Buildings workshop at Sustainable Places 2020. Watch again the session !


Participating European Commission representative: Dominique Planchon, Senior Program Officer, DG Research & Innovation

Further details about this workshop at

3D renderings of the HYBUILD Almatret demo site

HYBUILD coordinator COMSA has developed simplified BIM models of the Spanish Almatret demo site to support the installation of the hybrid storage system which is progressing.

Follow the progress of the Spanish installation as well as the 2 other HYBUILD pilot sites in Cyprus and Austria on their photo albums here.

Techno-Economic Analysis of a Heat Pump Cycle Including a Three-Media Refrigerant/Phase Change Material/Water Heat Exchanger in the Hot Superheated Section for Efficient Domestic Hot Water Generation

A new journal publication presenting HYBUILD outcomes has just been released !

Integration of a three-media refrigerant/phase change material (PCM)/water heat exchanger (RPW-HEX) in the hot superheated section of a heat pump (HP) system is a promising approach to save energy for domestic hot water (DHW) generation in multi-family houses. The RPW-HEX works as a desuperheater and as a latent thermal energy storage in the system. The latent thermal energy storage is charged during heating and cooling operation and discharged for DHW production. For this purpose, the water side of the RPW-HEX is connected to decentralized DHW storage devices. DHW consumption, building standards and climate, energy prices, material costs, and production costs are the constraints for the selection of the optimal storage size and RPW-HEX design. This contribution presents the techno-economic analysis of the RPW-HEX integrated into an R32 air source HP. With the aid of experimentally validated dynamic computer models, the optimal sizing of the RPW-HEX storage is discussed to maximize energy savings and to minimize the investment costs. The results are discussed in the context of a return of investment analysis, practical implementation aspects and energetic potential of the novel technology.

Profit after 20 years of operation for (a) Case #1 (passive house located in Helsinki) and (b) Case #2 (low energy building located in Strasbourg). Markers “▼”, “●” and “▲” denote small (140 L), medium (210 L) and large (280 L) decentralized DHW storage devices. Please note that for some cases, no profit can be made after 20 years of operation, so they are not shown in the figures.

Read the full article

Energy assessment based on semi-dynamic modeling of a photovoltaic driven vapour compression chiller using phase change materials for cold energy storage

A new journal publication presenting HYBUILD outcomes has just been released: Solar cooling systems are a promising solution for reducing the electrical consumption of conventional building cooling systems. Among various alternatives, photovoltaic driven vapour compression chillers are currently the most mature and economically feasible solar cooling technology. This study focuses on the semi-dynamic modelling of a vapour compression chiller coupled with a novel refrigerant-phase change material (PCM)-water heat exchanger (RPW-HEX) which replaces the conventional chiller’s evaporator, allowing the efficient storage of the produced cooling energy. A custom-build lumped parameter model was developed in TRNSYS and was used to assess the performance of the proposed system on annual basis. Using as benchmark a conventional PV driven vapour compression chiller with electrical storage, the retrofitted hybrid storage system showed improved performance, limiting the cooling demand peaks and enhancing the solar fraction, especially for partial cooling loads. Last, a comparison of the PCM thermal energy storage to conventional batteries was carried out, leading to enhanced performance characteristics for the latter.

Read more here