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OPTES-GT-Batterie-Entwicklung – 4th IWCB

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OPTES-GT-BATTERIE-ENTWICKLUNG - 4TH IWCB IN STUTTGART

    News
    September 25, 2025

    Presentation of the status of the OPTES-GT battery development during the 4th IWCB in Stuttgart on September 25, 2024.

    At the 4th International Workshop for Carnot Batteries, Dr. Schneider presented the current status of the development of a demonstration plant. The project is funded by grants from the Federal Republic of Germany as part of the ZIM program. The excellent measurement results of the high-pressure, high-temperature battery were also presented.Wärmespeichers nach Umsetzung konstruktiver Verbesserungen erläutert.

    The presentation can be found here, as well as in our download area.

    Download presentation
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    Our new pressurized HTTES – TESS 3B

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    OUR NEW PRESSURIZED HIGH TEMPERATURE THERMAL ENERGY STORAGE

      News
      December 05, 2023

      Our Pressurized High Temperature Thermal Energy Storage TESS 3B was developed specifically for use as a thermal power storage (Carnot battery). This enables the high temperature thermal heat storage to be discharged under pressure and the hot air to be expanded in a turbine to generate electricity. The successful discharging tests of the pressure storage with several bar overpressure and high temperatures at the same time deliver promising results and show that the storage technology works reliably even when pressurized and can be used in a Carnot battery.

      Tests with a turbine are planned for the near future to demonstrate reconversion into electricity.

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      OPTES-GT BATTERY

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      Vortrag über Hochtemperatur-Wärmespeicher

      OPTES-GT BATTERY

        Publications
        September 28, 2022
        Vortrag über Hochtemperatur-Wärmespeicher

        For lower power classes, the OPTES battery has been further developed into the OPTES-GT. The OPTES-GT Battery is based on an open Brayton Cycle.

        The OPTES-GT Battery was presented for the first time at the 3rd International Workshop on Carnot Batteries on September 28th, 2022 in Stuttgart.

        OPTES-GT Battery

        Note: Clicking on this video will play it on YouTube. Google's privacy policy applies.

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        Economic comparison of OPTES storage and Li-Ion storage

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        STORENERGY congress

        ECONOMIC COMPARISON OF OPTES STORAGE AND LI-ION STORAGE

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          Fairs
          November 24, 2021
          STORENERGY congress

          STORASOL presented the following study as part of the StoreEnergy trade fair. In a current and a future scenario, an economic comparison of the combination PV & OPTES ® battery versus PV & Li-ion battery is presented.

          The results show significantly lower electricity production costs (LCOP) for the OPTES ® battery compared to the Li-ion battery for both, the current and the future scenario, especially with charging and discharging times of more than 4 hours. Thus, a significantly higher profitability can be achieved with the OPTES ® battery compared to the Li-ion battery. The presentation slides can be downloaded HERE .

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          VHTTES – Very High Temperature Thermal Energy Storage

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          Very High Temperature Thermal Energy Storage - VHTTES

          VHTTES – VERY HIGH TEMPERATURE THERMAL ENERGY STORAGE

            News
            May 24, 2021
            Very High Temperature Thermal Energy Storage - VHTTES

            The basic engineering has just been completed for the VHTTES (Very High Temperature Thermal Energy Storage) shown in the figure. The storage systems are to be used in a solar power plant and in a thermal battery for storing electricity. The two storage tanks shown are flowed through with 1000 °C hot air and have a usable storage capacity of 10 MWh each.

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            Material tests with iron silicate (1.8-2.4 mm)

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            Materialversuch mit Eisensilikat

            MATERIAL TESTS WITH IRON SILICATE (1.8 - 2.4 MM)

              News
              May 8, 2020
              Materialversuch mit Eisensilikat

              Iron silicate with a grain size of 1.8 - 2.4 mm was tested as a new storage medium in our TESS 3A test storage facility. The first measurement results show very successful tests with an approx. 15 - 20 % higher energy density compared to silica sand.

              This higher energy density enables a significantly smaller design of the HTTES, which means that the specific investment costs per kWh can be significantly reduced. 

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              Material test at over 1000°C

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              Materialversuche mit über 1000 °C

              MATERIAL TEST AT OVER 1000 °C

                News
                December 20, 2019
                Materialversuche mit über 1000 °C

                Storage materials can be tested with temperatures of more than 1000 °C in the latest experimental set-up.

                First experiments show the expected behaviour of the material. There are no changes due to the high thermal stress. The excellent temperature resistance of the storage material is confirmed.

                Materialversuch über 1000°C

                A temperature of 1029.8 °C was reached in the first experiment.

                Further experiments will be carried out in the coming weeks to check the material's cycle stability more closely.

                Materialversuch über 1000°C

                Note: Clicking on this video will play it on YouTube. Google's privacy policy applies.

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                Presentation at IRES March 2020

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                IRES - International Renewable Energy Storage Conference

                PRESENTATION AT IRES MARCH 2020

                  News
                  Veröffentlichung
                  Dezember 4, 2019
                  IRES - International Renewable Energy Storage Conference

                  The managing directors of STORASOL are invited to talk at the IRES (International Renewable Energy Storage) conference in March 2020 and will speak about our latest HTTES power storage system.

                  The IRES in Düsseldorf is a trade fair for technologies in the fields of renewable energies and energy-saving. The storage and use of energy is the focus of this fair.

                  Under the title " Electricity Storage With A Solid Bed High Temperature Thermal Energy Storage System (HTTES) - A Methodical Approach To Improve The Pumped Thermal Grid Storage Concept " Dr. Ing. Günter Schneider will give the lecture and will be happy to answer your questions.

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                  STORENERGY congress Offenburg

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                  STORENERGY congress

                  STORENERGY CONGRESS OFFENBURG

                    News
                    November 13, 2019
                    STORENERGY congress

                    STORENERGY took place for the third time on the 12th and 13th of November 2019 at the Offenburg fair. The topics of the congress are storage technology, grid integration and the path to decentralized power production in order to use the energy sources economically.

                    Dr. Hartmut Maier, Managing Director of STORASOL, was invited to give a presentation in front of a high-ranking trade audience on the topic: Rock Storage - A Significant Contribution to the Heat and Energy Transition Gestein Speicher – Ein wesentlicher Beitrag zur Wärme- und Energiewende

                    See also:
                    https://www.storenergy.de/

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                    TESS 3A up to 640 °C

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                    Hochtemperatur-Wärmespeicher Tess 3A

                    TESS 3A UP TO 640 °C

                      News
                      October 8, 2019
                      Hochtemperatur-Wärmespeicher Tess 3A

                      Our new HTTES test stand TESS 3A was operated with temperatures of 640 °C. The charging and discharging characteristics were investigated.

                      Both, the temperature curves and pressure losses fully meet the expected behavior and the experiment was completed successfully.

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