Wyniki wyszukiwania - Biblioteka Nauki

1

Cyfrowy układ sterowania wysokonapięciowym przekształtnikiem : Kicker Power Supply

100%

Hołub M. , Kalisiak S. , Wojtkun M.

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tom Vol. 48, nr 11

100-101

PL

Przedstawiono podstawy wymagań procesu projektowania oraz budowę prototypowego układu sterowania wysokonapięciowym zasilaczem typu Kicker Power Supply. Precyzyjne sterowanie elementami mocy układu w dziedzinie czasu jest istotnym problemem układu, zwłaszcza biorąc pod uwagę znaczne różnice potencjałów w układzie oraz znaczne problemy z zapewnieniem odporności elektromagnetycznej. Zaprezentowano konstrukcję opartą na szeregowym połączeniu DSP-CPLD, podstawy zastosowanego systemu wielosygnałowej komunikacji między poszczególnymi modułami układu, obszerny materiał pomiarowy i dyskusję uzyskanych wyników.

EN

The paper discusses design process and a constructed digital control system for the time-critical control pulses of a high-voltage Kicker Power Supply system. Both design considerations and the system construction based on a DSP-CPLD devices are discussed. Moreover a multi-signal communication apparatus with system modules is presented, implementing the digital communication between high-voltage modules of different voltage references. Conclusions are giver based on a voluminous research and measurement results.

2

Resonant frequency stabilization technique in series-series contactless energy transfer systems

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Marcinek M. , Hołub M. , Kalisiak S. , Pałka R.

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nr 3

3

Development of low temperature plasma nox control system for marine diesel engine

100%

Borkowski T. , Myśków J. , Hołub M. , Kalisiak S.

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tom Vol. 14, No. 3

91-99

EN

The control of nox emissions from marine engines proves a challenge. Diesel engine manufacturers have been investigating a variety of methods with aim of reducing nox emissions. Currently, the plasma technology is undergoing rapid development in application to diesel engine exhausts. A combination of non-thermal plasma with catalysts can be referred to plasma assisted catalysts technology. This paper briefly describes research efforts aimed at non-thermal plasma reactor development for ship use with primary focus on NO oxidation condition. The part scale plasma reactor models have been designed and manufactured for the purpose of this trial. Exhaust emission plasma after-treatment module was fitted on exhaust outlet path of the marine test bed engine for fractional exhaust gas stream examination. Subsequently, the comprehensive series of trials were performed to assess the exhaust flow properties of the main exhaust channel and plasma reactor by-pass duct. Emission measurements were carried out on engine at steady-state operation. The NO reaction activity was a major task of the experiment and throughout the measurements, the engine outlet nox levels (NO and NO2) were monitored with simultaneous NO, NO2, N2O level recording after NTP reactor.

4

Destructive oxidation of ethanol in the corona discharge reactor

100%

Paterkowski W. , Parus W. , Kalisiak S.

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tom Vol. 11, nr 4

57-62

EN

The results of investigation of ethanol destructive oxidation (model aliphatic alcohol) in a corona discharge reactor are presented. The process was performed at the temperature of 303 K in the corona discharge generator - the reactor system manufactured in our laboratory. The process temperature was kept constant by cooling down the reactor with a stream of air. The measurements were carried out using the following process parameters: the inlet ethanol concentration in the stream of gases in the range of 0.0028 to 0.132 mol/m3 (0.128 ÷ 6.086 g/m3), the gas flow velocity in the range of 0.15-0.33 m3/h (space velocity in the range of 1220 ÷ 2680 m3/(m3R źh)) and the power supply to the reactor ranged from 1.6 to 86.4 W. The active volume of the reactor was 1.23ź10-4 m3. The phenomenological method was applied for the description of the process. It was based on the assumptions that the reaction rate can be described by the first order equation in relation to the ethanol concentration and the design equation of flow tubular reactor can be applied for the description of corona reactor. The usefulness of this model was estimated using statistical methods for the analysis of the experimental results. The Statistica 6.0 software was used for this application. The first stage of this analysis showed the dependencies between the considered variables, whereas the second stage was to find the equations describing the influence of the selected process parameters on the rate of ethanol destruction. The parameters of A and B of apparent constant rate equation given in the form of Z = Aźexp(-B/P) were also determined. The results of the investigations indicated that the applied corona discharge generator - reactor system assures a high efficiency of purification of the air and industrial waste gases contaminated by ethanol. The ethanol destruction degree of αi = 0.9 was obtained at the power supply to the reactor amounting to 650 kW/m3R per unit of its active volume. The final products of the reaction were only the harmless carbon dioxide and water vapour. It has been stated that the rate of the destructive oxidation of ethanol reaction is well described by the first order equation in relation to the ethanol concentration. Under isothermal conditions, the reaction rate also depends on the power supply to the reactor. This dependence is well described by the empirical equation Z = 3,233źexp(-82,598/P). The obtained results also indicated that the method of destructive oxidation of ethanol in the corona discharge reactor can be useful for the removal of ethanol and probably other aliphatic alcohols from different gases. The described method of calculation of the real rate of the process can be successfully used in the design of corona discharge reactors applied for such processes.