The project started in April 2018. The Kick-off meeting was held in Brussels on April 26, 2018.

The POLYPHEM project is now over!

After 53 months of collaborative research, POLYPHEM came to an end on 31 August 2022. We would like to thank all the partners for working together on this important project…

COVID-19: POLYPHEM is extended by 5 months

Since most facilities were closed during the COVID-19 context, the European Commission has approved an extension of 5 months for POLYPHEM. Therefore, the project will end in August 2022 instead of March 2022.

Deliverable 3.3: Report on Filler Material

POLYPHEM has submitted the deliverable D3.3 – Report on Filler Material – published within WP3 (R&D on Thermal Energy Storage System).

Periodic Reporting 1: Review of the first 18 months of POLYPHEM

The European Commission has published the first Periodic Report of POLYPHEM, which reviews the advancements achieved during the first 18 months of the project.

Preliminary system modelling (in WP7)

The first draft of optical simulation model of THEMIS heliostat field is established.

Measurement techniques (in WP6)

The technical specification of the circumsolar measurement camera is done.

Overall plant layout and integration of the subsystems (in WP4)

Face-to-face meeting between KAEFER and Fraunhofer ISE was held on May 9, 2018 to discuss about the specification and the operation conditions of the micro-gas turbine, the plant operating strategies…

Studies on fillers and modelling of thermal energy storage using thermocline (in WP3)

Jarytherm DBT is been chosen as HTF in the storage loop The partners shared their experience on HTF-solid compatibility testing through a common form and phone conference meeting. The partners…




Technology Impact

The approach proposed in the project is a new design of small-scale CSP plants. The project prepares the next generation of small-scale CSP plants with high performance combined cycle and flexible generation of renewable electricity with firm capacity. The proposed cycle features a reduced water requirement compared to steam Rankine cycle. The optical efficiency of small solar tower system is higher than that of any other solar field. Combined with the potential high conversion efficiency of the thermodynamic cycle, the resulting efficiency allows for additional reduction of the size of solar field. Micro gas-turbines and small ORCs have proven their reliability in the long-term. The technology developed in the project offers an extended range of designs by varying the size of the components, each design being optimized for a specific need (power generation, cogeneration, heating/cooling, water desalination).

Economic Impact
European competitiveness
Environmental Impact
Social Impact