Prohlížení Acta Polytechnica. 2012, vol. 52, no. 3 dle názvu
Zobrazují se záznamy 5-19 z 19
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Effect of Gas Mixture Composition on the Parameters of an Internal Combustion Engine
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)This paper deals with the use of the internal combustion piston engine, which is a drive unit for micro-cogeneration units. The introduction is a brief statement of the nature of gas mixture compositions that are useful ... -
Energy Recovery from Contaminated Biomass
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)This study focuses on thermal gasification methods of contaminated biomass in an atmospheric fluidized bed, especially biomass contaminated by undesirable substances in its primary use. For the experiments, chipboard waste ... -
Experimental Investigation of Radial Gas Dispersion Coefficients in a Fluidized Bed
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)In a fluidized bed boiler, the combustion efficiency, the NOX formation rate, flue gas desulphurization and fluidized bed heat transfer are all ruled by the gas distribution. In this investigation, the tracer gas method ... -
Explosion Cladding of Lead on Steel
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)This work deals with explosion cladding of lead on steel. The welded materials and the Semtex S type explosive are characterised. The preparation of the welded materials and the proposed welding assembly are described. The ... -
Heat Exchangers for Condensation and Evaporation Applications Operating in a Low Pressure Atmosphere
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)This paper presents a state-of-the-art study of a heat transfer process in liquid spraying heat exchangers placed in a vacuum chamber. The experimental case studied here describes the behavior of a falling film evaporation ... -
Idealized Compression Ratio for a Screw Briquetting Press
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)This paper deals with issues in determining the ideal compression ratio for a screw briquetting press. First, the principles of operation and a basic description of the main parts of a screw briquetting press are introduced. ... -
Lab-scale Technology for Biogas Production from Lignocellulose Wastes
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)Currently-operating biogas plants are based on the treatment of lignocellulose biomass, which is included in materials such as agriculture and forestry wastes, municipal solid wastes, waste paper, wood and herbaceous energy ... -
Measurement of O2 in the Combustion Chamber of Apulverized Coal Boiler
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)Operational measurements of the O2 concentration in the combustion chamber of a pulverized coal boiler are not yet common practice. Operators are generally satisfied with measuring the O2 concentration in the second pass ... -
Modularity of Pressing Tools for Screw Press Producing Solid Biofuels
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)This paper focuses on the development of the newly-patented structure of a screw briquetting machine for compacting biomass into a solid biofuel. The design of the machine is based on the results of a comprehensive study ... -
Optimal Combustion Conditions for a Small-scale Biomass Boiler
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)This paper reports on an attempt to achieve maximum efficiency and lowest possible emissions for a small-scale biomass boiler. This aim can be attained only by changing the control algorithm of the boiler, and in this way ... -
Plasma Surface Treatment of Powder Materials — Process and Application
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)Polyolefin particles are hydrophobic, and this prevents their use for various applications. Plasma treatment is an environment-friendly polyolefin hydrophilisation method. We developed an industrial-scale plant for plasma ... -
Production of Biocellulosic Ethanol from Wheat Straw
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)Wheat straw is an abundant lignocellulosic feedstock in many parts of the world, and has been selected for producing ethanol in an economically feasible manner. It contains a mixture of sugars (hexoses and pentoses).Two-stage ... -
Research and development of CO2 Capture and Storage Technologies in Fossil Fuel Power Plants
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)This paper presents the results of a research project on the suitability of post-combustion CCS technology in the Czech Republic. It describes the ammonia CO2 separation method and its advantages and disadvantages. The ... -
Resistance Spot Welding of dissimilar Steels
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)This paper presents an analysis of the properties of resistance spot welds between low carbon steel and austenitic CrNi stainless steel. The thickness of the welded dissimilar materials was 2 mm. A DeltaSpot welding gun ... -
Use of Grasses and Mixtures of Grasses for Energy Purposes
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)As levels of agricultural productivity increase, there is also an increase in land area not utilized for food production. This area can be used for growing energy crops, including grasses. When land is set aside for grassing, ...