NCK energetika - sekce energetického inženýrství

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    Technical and economic optimization of cogeneration technology using combustion and gasification
    (Czech Technical University in Prague, 2014-02-28) Lisý, Martin; Baláš, Marek; Špiláček, Michal; Skála, Zdeněk
    This paper presents the technical and economic optimization of new microcogeneration technology with biomass combustion or biomass gasification used for cogeneration of electrical energy and heat for a 200 kW unit. During the development phase, six possible connection solutions were investigated, elaborated and optimized. This paper presents a basic description of the technology, a description of the technological solutions, and especially the results of balance and financial calculations, ending with a comparison and evaluation of the results.
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    Size analysis of solid particles at the experimental device for multi-stage biomass combustion
    (Czech Technical University in Prague, 2014-02-28) Hrnčířová, Michaela; Špiláček, Michal; Pospíšil, Jiří
    This paper presents the results of an analysis of ash content particles produced in biomass combustion at an experimental device. The main parts of the device are: the water heater, the gasifying chamber, the air preheater, and the fuel feeder. This device can be modified for combustion in an oxygen-enriched atmosphere. Sawdust and wood chips were used as fuel, and were laid loosely into the device. Ash specimens were extracted from various parts of the device. For the measurements themselves, we used the Analysette 22 MicroTec Plus universal laser diffraction device manufactured by the Fritch Company, in the size range from 0.08 micro meter to 2000 micro meter. The device utilizes laser diffraction for particle size analysis.
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    FINE AND ULTRA FINE PARTICLES FORMED DURING THE BIOMASS COMBUSTION IN SMALL COMBUSTION DEVICES
    (2020-04-01) Poláčik, Ján; Popelová, Barbora; Pospíšil, Jiří; Adamec, Vladimír
    Currently, more and more emphasis is placed on improving the air quality and promoting alternative methods of household heating, including the use of biomass. Although these combustion processes are considered to be environment-friendly, the fine and ultra-fine particles are also produced in these cases, which can have a negative impact on human health. The paper presents the results of experimental biomass combustion, where the concentrations and generated particle sizes were monitored during the process. In particular, selected combustion parameters were taken into account such as temperature, amount of oxygen, etc., which have a significant influence on particle formation. The particles were sampled during the measurements with the aim to determine their morphology and chemical compositions. The gathered results are intended to be used for the design of the technical measure based on the principle of temperature stabilization, leading to reducing the concentration of fine and ultra-fine particles produced by small combustion devices.