A new high-flux solar furnace, capable of delivering up to 40kW at peak concentration ratios exceeding 5000, is operational at PSI. Its optical design characteristics, main engineering features, and operating performance are described. This solar concentrating facility will be used principally for investigating the thermochemical processing of solar fuels at temperatures as high as 2500 K.

The present work is motivat microwaves for the catalytic conversion of c carbon monoxide. Chemical reactions like thi catalyst temperatures of more than 800 °C. design of the microwave assisted reactor re knowledge of the dielectric properties of the cat support materials up to those high temper purpose a measurements system based on the ca method was built. The system is using a rectang with a resonance frequency at 2.45 GHz and Q § 12000. A novel synthetic calibration m numerical full-wave modeling has been d alternative to traditional calibration methods. T temperature dielectric measurements for polye (PEEK), MACOR glass ceramics and zirconia a Index Terms -Cavity resonators, high temp measurements, numerical simulation, perturbat

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A compact 10 kW microwave applicator operating at 2.45 GHz for fast volumetric heating and thermal cracking of lignite briquettes has been successfully designed and tested. In this paper, the applicator design and construction are presented together with a sequentially coupled electromagnetic, thermal-fluid and mechanical Comsol model. In a first step, this model allows us to calculate the power density inside the lignite material and the temperature distribution in the applicator for different water flow rates. In a second step, the total stress due to the thermal dilatation, the internal pressure inside the ceramic and the contact pressure from the seals at both ends of the ceramic can be computed. In addition, preliminary experimental results are given and showed a significant mechanical strength weakening of the briquettes with microwave heating.

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