scholarly journals IMPROVEMENT OF ECOLOGICAL CHARACTERISTICS OF SHIP ELECTRIC POWER INSTALLATIONS BY APPLICATION HYDROGENOUS SYNTHESIS GAZ

2017 ◽  
pp. 44-52
Author(s):  
Sergei Pavlovich Glushkov ◽  
Victor Ivanovich Kochergin ◽  
Vasiliy Victorovich Krasnikov ◽  
Anton Yuryevich Kirpichnikov
Keyword(s):  
Electric Power ◽  
Synthesis Gas ◽  
Diesel Engines ◽  
Intake Manifold ◽  
Oxides Of Nitrogen ◽  
Operating Characteristics ◽  
Exhaust Gases ◽  
Ecological Characteristics ◽  
Power Stations ◽  
Power Installations

For ensuring improvement of operating characteristics of ship electric power installations with diesel engines of internal combustion it is offered to use additives hydrogenous synthesis gas, the hydrocarbon fuel produced by catalytic converting directly onboard the vehicle. This process will allow to provide realization of advantages of hydrogen fuel without essential constructive changes of power stations. Synthesis gas which mode of functioning is based on preliminary evaporating and the subsequent oxidation of fractions of hydrocarbons of diesel fuel is offered to make catalytic conversion on the basis of use of generators. As a result, gas containing hydrogen and monoxide carbon is formed. Pilot studies on influence of additives hydrogenous synthesis gas on ecological characteristics of diesel engines were conducted on diesel-generator installations 1Ч 8.2/7.5 and 4ЧН 95/115. Tests were carried out in no-load conditions and nominal rotary speed with electric load of the generator. Synthesis gas was supplied in an intake manifold of the engine. It has been established that use of additives of hydrogenous fuel is expedient only during the operation of power stations in the load modes. In the course of the conducted researches it has been shown that use of hydrogenous synthesis gas additives reduces the content of harmful substances in the exhaust gases (including monoxide carbon, hydrocarbons, oxides of nitrogen and solid black particles), and also reduces temperature of exhaust gases. Optimum sizes of giving hydrogenous synthesis gas in a percentage ratio from the mass of the main fuel are determined.

scholarly journals Ways of reduction of pollution of an environment by ship power installations

2019 ◽  
pp. 479-485
Author(s):  
Andrei V Ivanov ◽  
Valery A. Petuchov
Keyword(s):  
Electric Power ◽  
Control Systems ◽  
Cooling Water ◽  
Exhaust Gases ◽  
Automation And Control ◽  
Complex Automation ◽  
Main Engine ◽  
And Control ◽  
Power Installations

In the report are discussed ways of reduction of pollution of an environment by ship power installations. Among them it is necessary to select optimization of regimes of operations of main traditional ship sources of the electric power, the installation of systems of utilization of refuse energy of the exhaust gases and cooling water from main and auxiliary engines, application of new types of sources of the electric power and the using of complex automation and control systems for exhaust gases and for selecting of regimes main engine, auxiliary engine, utilize boiler, auxiliary boiler, shaft generator.

scholarly journals Effects of thermal treatments on characteristics and morphological variations in the deposits of urea-SCR systems

2021 ◽  
Author(s):  
Sadashiva Prabhu S ◽  
Kapilan Natesan ◽  
Nagaraj Shivappa Nayak
Keyword(s):  
Cyanuric Acid ◽  
Catalytic Reduction ◽  
Morphological Changes ◽  
Water Solution ◽  
Slight Variation ◽  
Gravimetric Analysis ◽  
Oxides Of Nitrogen ◽  
Deposit Formation ◽  
X Ray ◽  
Exhaust Gases

AbstractSelective catalytic reduction (SCR) systems are employed by automobile manufacturers for the abatement of environmental pollutants like oxides of nitrogen (NOx) emitted from exhaust gases of diesel engines. In SCR, the urea-water solution (UWS) is injected to exhaust gases in the form of a spray to generate the reducing agent NH3. Deposit formation at lower temperatures is a major concern with this technology. The deposits not only create backpressure but also leak NH3 to the environment as they deplete. It is very important to know the depletion characteristics of deposits formed at lower temperatures in order to assess the NH3 leakage to the environment when the engine exhaust gases attain higher temperatures. In the present work, deposits formed at a low-temperature range of 150–200°C for continuous run along with UWS injection were investigated. Additionally, they were aged at 300°C in the absence of UWS to check the variation in characteristics with the rise of temperature. By gravimetric analysis, it is inferred that the deposits formed at higher pre-age temperatures are less prone to depletion as the temperature increases. The elemental analysis using energy-dispersive X-ray spectroscopy (EDX) indicates slight variation in carbon, nitrogen and oxygen compositions for all the pre-age conditions. As an extended study, the byproducts at pre-age and post-age conditions were investigated through X-ray diffraction (XRD). The compounds like cyanuric acid (CYA) and biuret were not observed when pre-age samples were aged at 300°C. Instead, the compounds like ammelide, ammeline, triuret and melamine were observed. Scanning electron microscope (SEM) study revealed morphological changes in both pre-age and post-age samples. Further, the crystallinity variations were also observed for the changes in the heating cycles during deposit formation. The gravimetric analysis of deposits in pre-age and post-age conditions helps in predicting the amount of deposits for transient load cycles.

Discussion on “An investigation as to the most economical vacuum in electric power stations employing steam turbines and cooling towers”

1910 ◽  
Vol 44 (201) ◽  
pp. 687-688
Author(s):  
J.A. Robertson ◽  
G.L. Black ◽  
S.A. Simon ◽  
W.B. Sayers ◽  
M.G.S. Swallow ◽  
...  
Keyword(s):  
Electric Power ◽  
Cooling Towers ◽  
Steam Turbines ◽  
Power Stations

MGU-Messprogramm 9178 „Abgase von Dieselmotoren“ am Arbeitsplatz. Teil 2: Ergebnisse/MGU measuring program 9178 „Exhaust gases from diesel engines“ at the workplace. Part 2: Results

Gefahrstoffe ◽  
2020 ◽  
Vol 80 (03) ◽  
pp. 100-108
Author(s):  
U. Koch ◽  
E. Willer ◽  
R. Radtke
Keyword(s):  
Diesel Engines ◽  
Exhaust Gases

Der Einsatz von Dieselmotoren ist in der Arbeitswelt weit verbreitet, wodurch Beschäftigte deren Emissionen ausgesetzt sein können. Deutliche Fortschritte in der Abgasreinigungstechnik in Verbindung mit der fortlaufenden Aktualisierung des Maschinen- und Fahrzeugbestandes in Deutschland sowie Aktualisierungen der einschlägigen Arbeitsschutz-Regelungen – allen voran die Technische Regel für Gefahrstoffe (TRGS) 554 – Abgase von Dieselmotoren ließen erwarten, dass die Expositionen am Arbeitsplatz kontinuierlich messbar abnehmen. Um dies zu überprüfen, legten die Unfallversicherungsträger 2014 ein Messprogramm auf, das nicht nur die Dieselrußpartikel, sondern auch gasförmige Bestandteile der Dieselmotorabgase, insbesondere Stickstoffdioxid und Stickstoffmonoxid, umfasste. Die Ergebnisse deuten darauf hin, dass in vielen Arbeitsbereichen nur in Ausnahmenfällen mit Grenzwertüberschreitungen zu rechnen ist. Probleme wurden, wenn auch nur sporadisch, in Werkstätten und Wartungsbereichen vorgefunden, in denen tätigkeitsbedingt längere Motorlaufzeiten vorlagen. Grenzwertüberschreitungen ließen sich aber immer auf spezifische Mängel bei den Schutzmaßnahmen zurückführen.

Testing of power-generating gas-turbine plants at Russian electric power stations

2006 ◽  
Vol 40 (4) ◽  
pp. 251-257
Author(s):  
G. G. Ol’khovskii ◽  
A. V. Ageev ◽  
S. V. Malakhov ◽  
S. D. Nagornyi ◽  
V. P. Trushechkin ◽  
...  
Keyword(s):  
Electric Power ◽  
Gas Turbine ◽  
Power Stations
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