The focal point of energy technology
Solar absorber components made of Keramikblech®:
Recently, sheet ceramic components for a volumetric receiver of the Noor III solar tower plant have been completed. Due to its exceptional properties, sheet ceramic is interesting for hot gas generation in this type of solar energy conversion, where thermally and mechanically highly loadable components are required.
The American company Wilson Solarpower Corporation had developed the technical basis for the Brayton Cycle CSP* system, which thereupon has been marketed as 247Solar Plant™ by 247Solar Inc. This proprietary CSP* technology uses hot air as a heat transfer medium instead of the usual steam or nitrate salt.
The solar absorber, designed as a volumetric receiver, is a central component of the Noor III solar plant in Morocco. On top of the solar power tower, it heats the air passing through up to 970 °C. In combination with a microturbine, this hot air is used to generate solar electricity.
The basket like structure made of sheet ceramic, (Keramikblech), holds the ceramic SiC foams together, where the heated air flows through. The combination of SiC foams as the absorber material and the supporting structure made of sheet ceramic, make the absorber perfectly suited for these extreme challenges and will guarantee a long-term use at the same time.
In order to make a contribution to the energy supply of our common future, we were glad about this task.
Thanks to our customers and partners for their great cooperation.
*CSP = Concentrating Solar Power
Further information on this subject:
First test drive with an exhaust manifold made of sheet ceramic
In close cooperation with Formula Student „Bodensee Racing Team“ Constance an exhaust manifold made of sheet ceramic was produced. In early November, this exhaust system was installed in the racing car for a test drive.
Compared to metal, the fibre-reinforced ceramic does not corrode, is light, thermal insulating and extremely heat-resistant. The sheet ceramic component could easily withstand the vibrations during the test drive. Working on the exhaust system was possible a few minutes after the test drive, because the ceramic material cools down much faster than metal. We are looking forward to the further development of this project.
More information about the project: homepage.brt-konstanz.de
Dawn of VTOL with sheet ceramic technology
September 17, 2018:
Jetoptera, Inc. has commenced the Vertical Take Off and Landing (VTOL) test campaign, demonstrating capabilities to vertically take off and hover a testbed of more than 50 kg.
A vertical launch of groundbreaking success:
the tests show an excellent thrust vector control via a swiveling Fluidic Propulsive System™, (FPS™), which can be rotated more than 90 degrees out of the horizontal position for VTOL. The platform demonstrated the excellent maneuverability and vertical takeoff capabilities. In addition, findings on demonstrate Short Take-Off and Landing / STOL capabilities.
This is the first time that the thin-walled thrusters made of sheet ceramic were employed for a VTOL test and its low weight properties enable the FPS™ capabilities.
All Jetoptera products except the J-55, including the four-seat VTOL aircraft “Jetoptera 4000”, are employing the proprietary fluidic propulsive system FPS™.
Further information can be found on the www.jetoptera.com
Jetoptera FPS™ system completes another flight test campaign
A second model – this time a glider – took to the skies on July 5th, 2018, powered solely by the Fluidic Propulsion System™.
The successful test flight demonstrates the flexibility of the propulsion FPS™ concept used on various configurations of the airframe. The glider will be used as test bed for future shapes of the thrusters, including round and non-round, enabled by Walter E.C. Pritzkow special ceramics construction method.
The advantages of the system: small size, distributed thrust and high speeds, low weight, simplicity, considerable payloads and exceptional maneuverability are obvious, and its scalability can be extended to the new concepts of urban air mobility.
These successful flights strengthen the cooperation between Walter E. C. Pritzkow special ceramics and Jetoptera, Inc. The ultralight ceramic sheet thrusters were key to keeping the weight of the FPS low and the thrust to weight ratio high. The flight and further technical details can be seen on the Jetoptera, Inc. Company website:
For the first time a component made of sheet ceramic, built into the model “J55”, takes to the skies. Edmonds / Washington-based Jetoptera, Inc. developed the Fluidic Propulsion System™, an innovative propulsion concept for an unmanned aerial vehicle. For the first time the fluidic propulsion technology was implemented on the airframe. A consistent development of fluid mechanical components, the implementation of the latest ceramic technologies and innovative manufacturing techniques are components of the compact, revolutionary design.
The sheet ceramic were incorporated into the thrusters of the model Jetoptera J55, due to the low density of the ceramic material, which is only 36% of the steel density, as well as its high thermal load capacity, especially developed for this challenging task.
The test flight of the Jetoptera prototype on April 26 this year was a world premiere in terms of design and drive technology for unmanned aerial vehicles, but also in regards of the wide range of applications of the oxide ceramic fiber composite "sheet ceramic" in industry and research.
“Keramikblech” flame tubes 15 years in successful use
Already 15 years ago, in 2002, flame tubes made of “Keramikblech” (sheet ceramic), were delivered for burners from the company Weishaupt for the first time. The first flame tube was installed by the large bakery Wendeln near Munich, (at that time already Kamps), in a baking line, on which the crispbread “Lieken Urkorn” was produced. This production line was sold in 2003 to Wolf Süsswaren in Arnstadt, Thuringia, where a second baking line was also equipped with flame tubes made of “Keramikblech". Both plants are still in operation. Today this industrial bakery is called “Grabower Süsswaren”.
The lifetime of metal flame tubes in 2002 was approximately 1000 hours. The durable flame tubes made of sheet ceramik are only replaced if they are mechanically damaged during maintenance. Therefore a more than 50,000 hours lifetime of “Keramikblech” flame tubes is about 50 times higher than the lifetime of metal flame tubes.
Further flame tube types for “Weishaupt burners” are mainly used in crematoria. In these applications the lifetime of 10 weeks is extended to more than 2 years.
The sliding carriage of the 1st generation, shown above, passed through 2800 cycles by now but still works with its fissures. The sliding carriage of the 2nd generation currently passed through 920 cycles.
The application temperature of these sliding carriages is between 1000 – 1140 °C. The cycle time amounts approx. 2 hours. It's loaded with test bodies, is pushed into the hot stove and pulled out again after a not known residence time.