scholarly journals High-accuracy Nanoparticle Sensor for Combustion Engine Exhaust Gases

2016 ◽  
Vol 168 ◽  
pp. 35-38 ◽  
Author(s):  
M. Kraft ◽  
J. Kaczynski ◽  
T. Reinisch ◽  
M. Unger ◽  
A. Bergmann
Keyword(s):  
Combustion Engine ◽  
High Accuracy ◽  
Engine Exhaust ◽  
Exhaust Gases

Theoretical and Experimental Study of Operation of the Tank Equipment for Ultrasonic Purification of the Internal Combustion Engine Exhaust Gases

2021 ◽  
Vol 23 (3) ◽  
pp. B219-B226
Author(s):  
Adil Kadyrov ◽  
Aleksandr Ganyukov ◽  
Igor Pak ◽  
Bahtiyar Suleyev ◽  
Kyrmyzy Balabekova
Keyword(s):  
Experimental Data ◽  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Experimental Studies ◽  
Internal Combustion ◽  
Rate Of Change ◽  
Motor Vehicles ◽  
Engine Exhaust ◽  
Exhaust Gases ◽  
Equipment Operation

The article presents results of scientific and experimental studies of the authors on operation of the tank equipment for ultrasonic purification of exhaust gases of internal combustion engines designed to reduce environmental pollution. The scheme of the experimental device implementing the principle of the tank equipment operation for ultrasonic cleaning of the motor vehicles exhaust gases is presented; the obtained experimental data of ultrasonic coagulation processes were processed and analyzed. Empirical relationships of the coagulation coefficient and its rate of change are derived from experimental data.

scholarly journals Determination of the optimal working fluid for the turbine recovering combustion engine exhaust gases heat

2019 ◽  
Vol 91 ◽  
pp. 01001 ◽  
Author(s):  
Yury Matveev ◽  
Marina Cherkasova ◽  
Viktor Rassokhin ◽  
Kirill Lapshin ◽  
Nikolay Kortikov ◽  
...  
Keyword(s):  
Combustion Engine ◽  
Developed Countries ◽  
Operating Conditions ◽  
Working Fluid ◽  
Thermodynamic Efficiency ◽  
Engine Exhaust ◽  
Economic Point ◽  
Flow Passage ◽  
Exhaust Gases ◽  
Turbine Installation

Microsteam turbine implementation for combustion engine exhaust gases heat recovery and subsequent acquisition of additional power is being investigated in many developed countries of the world. The results of such studies have already found application in some trucks. But this type of turbines is very weak in the Russian market. Turbine installation behind the combustion engine works under conditions of low volumetric flow of work fluid. This leads to a decrease in the height of the blade and vane wheels flow passage and an increase of the relative values of the gaps in the seals which are the reasons for the growth of the working fluid leakages. High degree of pressure reduction when selecting single-stage turbine leads to a supersonic velocity in the flow passage and an increase of the losses due to powerful shock waves. The efficiency of the turbine installation under these operating conditions is low and requires additional investigations. In this work, the working fluids which can give the greatest efficiency of the turbine installation were investigated. It was shown that not only thermodynamic but also hazardous and economic parameters must be taken into consideration. Working fluid with the high thermodynamic efficiency was compared with the one that profitable from economic point of view. The most appropriate substance was chosen and implemented in the microsteam turbine. The turbine stage which allows increasing economy and ecological compatibility of the combustion engine was developed and optimized by analytical methods.

Thermo-Chemical Recuperation as an Efficient Way of Engine's Waste Heat Recovery

2014 ◽  
Vol 659 ◽  
pp. 256-261 ◽  
Author(s):  
Leonid Tartakovsky ◽  
Vladimir Baibikov ◽  
Marcel Gutman ◽  
Arnon Poran ◽  
Mark Veinblat
Keyword(s):  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Combustion Engine ◽  
Pollutant Emissions ◽  
Efficiency Improvement ◽  
Joint Operation ◽  
Engine Exhaust ◽  
Exhaust Gases ◽  
Reforming Reactions

It is known that about 30% of fuel energy introduced to an internal combustion engine (ICE) is wasted with engine exhaust gases. One of the promising ways of waste heat recovery is thermo-chemical recuperation (TCR). For the purpose of TCR realization, in principle any fuel may be used. However, utilization of renewable bio-alcohols, especially ethanol or methanol is the most favorable. The advantages of TCR over turbocharging are in the fact that its energy transfer is not limited by isentropic expansion and that the reforming process improves the fuel properties. A comprehensive theoretical analysis of the ICE with TCR was carried out using the developed model for simulation of the joint operation of ICE with alcohol reformer, when the ICE is fed by the alcohol reforming products and the energy of the exhaust gases is utilized to sustain endothermic reforming reactions. Simulation results show that it is possible to sustain endothermic reforming reactions with a reasonable reactor size. Modeling results point out a possibility of engine's efficiency improvement by up to 13% in comparison with ICE feeding by gasoline together with achievement of zero-impact pollutant emissions.

scholarly journals Reduction of polycyclic aromatic hydrocarbons and nitrogen monooxide in combustion engine exhaust gases by clinoptilolite

2012 ◽  
Vol 28 (2) ◽  
pp. 113-123 ◽  
Author(s):  
Jozef Mačala ◽  
Iveta Pandová ◽  
Taťána Gondová ◽  
Katarína Dubayová
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Natural Zeolite ◽  
Catalytic Properties ◽  
Combustion Engine ◽  
Slovak Republic ◽  
Engine Exhaust ◽  
Exhaust Gases ◽  
Toxic Gases ◽  
Polycyclic Aromatic

Reduction of polycyclic aromatic hydrocarbons and nitrogen monooxide in combustion engine exhaust gases by clinoptilolite The subject of this work was the investigation of zeolite as a sorbent of toxic gases. In Nizny Hrabovec in the Slovak republic, two layers of zeolite with the active component clinoptilolite can be found. The study presented here investigated the ability of this natural zeolite to reduce polycyclic aromatic hydrocarbons (PAH) and NO emissions from engine exhaust. Exhaust gases from combustion engines include toxic components such as carbon monoxide, nitrogen oxides and hydrocarbons. Polycyclic aromatic hydrocarbons (PAH) are a component of hydrocarbons causing harmful influence on life forms. The experiments focused on the potential reduction of these toxic gases based on the sorption and catalytic properties of natural zeolite. Also observed was the influence of chemical adjustment including incorporation of certain metal elements. Chemical analysis by mutually independent technologies served to observe the sorption of PAH with carcinogenic properties on the natural zeolite tested. The experiments showed that chemical modification improved the sorption and catalytic properties of natural zeolite. The PAH were analysed in an extract of the contaminated, thermally-activated natural zeolite and modified zeolite after washing with ammonium chloride, cobalt chloride and copper sulphate. The study also presents results of NO measurements obtained by testing the filter-sorptive automobile system.

AN IMPROVED ARMORED VEHICLE KRAZ “FIONA” NOISE SILENCER

2019 ◽  
pp. 21-26
Author(s):  
Volodymyr Fedorov ◽  
Vasyl’ Yanovsky ◽  
Dmytro Kovalshuk
Keyword(s):  
Noise Reduction ◽  
Speed Of Sound ◽  
Acoustic Waves ◽  
Noise Level ◽  
Combustion Engine ◽  
Environmental Aspect ◽  
Exhaust Gases ◽  
Ecological Requirements ◽  
On The Road ◽  
Armored Vehicle

Ecological requirements for cars grow from year to year, both in the world as a whole, and in Ukraine in particular. This is especially true of noise pollution. Additionally, noise reduction becomes relevant, taking into account the conduct of military operations during the last 5 years on the territory of Ukraine. The war has caused a special need for military vehicles for which masking properties are vital. Noise is a serious disincentive factor. Therefore, its reduction for a military vehicle, apart from the environmental aspect, is of a purely military nature, that is, it is extremely important. The car has many sources of noise there are many ways to deal with them. One of the most powerful source of noise is the sleeping bag. This kind of noise is reduced by means of silencers of noise. The vast majority of silencer data in the basis of its design has a reactive (or resonant) muffler. To calculate the jet silencer you must know the speed of sound in the sleeping bags. In order to increase the acoustic efficiency of reactive and resonant mufflers of exhaust gases noise of the ICE of cars, an experimental method was proposed for determining the speed of sound in the sleighs. Implementation of the method is carried out by measuring the attenuation of acoustic waves. The noise level of the bedrooms is measured without silencer and silencer. Based on the data obtained, the noise reduction performance of the residual is established. From the well-known formula, based on the calculation of the efficiency of the silencing of a jet muffler, a formula is obtained for calculating the speed of sound in the sleeping quays. In this formula, all parameters are known: the level of silencer efficiency, the noise level of the sleeping, the ratio of areas of cross sections of the muffler and the inlet pipe and the length of the muffler. The sound speed thus established can continue to be used not only for engines of the type for which measurements and calculations were made, but also with a certain approximation for some other types of engines. This method provides high accuracy for determining the required parameter. In the given work on the example of the armored car KrAZ “Fiona” the calculation of efficiency increase of the reactive silencer is made due to the above-mentioned method. Also, the projected decrease in the external noise level of the KrAZ Armored Vehicle “Fiona” is considered by determining the speed of sound in the recesses on the trunk cycle on the road with acceleration up to speed of 50 km/h (75 km/h) and the movement with this speed, as well as when driving at a speed of 45 km/h. Keywords: transport, armored car, internal combustion engine, exhaust, exhaust gases, noise, source, acoustic efficiency, acoustic efficiency, speed of sound, jet muffler.

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