Angelika Heinzel

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Fuel cells convert chemical energy directly into electrical energy with high efficiency and low emission of pollutants. However, before fuel-cell technology can gain a significant share of the electrical power market, important issues have to be addressed. These issues include optimal choice of fuel, and the development of alternative materials in the(More)
In this paper, an experimental fuel cell/battery/supercapacitor hybrid system is investigated in terms of modeling and power management design and optimization. The power management strategy is designed based on the role that should be played by each component of the hybrid power source. The supercapacitor is responsible for the peak power demands. The(More)
At the Centre for Fuel Cell Technology ZBT in Duisburg currently a 300 Watt fuel cell system of liquid gas-powered operation is being developed with focus on leisure boats. An excellent infrastructure is available for this fuel in the domain of recreational activities and users are familiar with the safe handling of liquid gas. The use of electric(More)
DNA segments were analyzed for six proteins regulating the transcription in the early embryonic development of Drosophila melanogaster in which a significant binding of these proteins was observed by the method of immunoprecipitation of chromatin followed by the precipitation on the template (Chip-chip). The regions of high density of the theoretically(More)
• good electrical conductivity (>100 S cm 1 bulk conductivity), • high thermal conductivity (>20 W cm ), • high chemical and corrosion resistance, • mechanical stability toward compression forces, • low permeability for hydrogen, • low-cost material being processable with mass production techniques, • low weight and volume, and • recyclable materials. Two(More)
HYPER (HYbrid Power Extraction Reactor) is the accelerator-driven transmutation system developed by KAERI (Korea Atomic Energy Research Institute). HYPER is designed to transmute long-lived transuranic actinides and fission products such as Tc and I. HYPER adopts a fast neutron system and Pb-Bi is used as core coolant and target material. Pb-Bi corrosion is(More)
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