Wyniki wyszukiwania - BazTech

1

The possibility of use a waste product of biofuels production-glycerol as a fuel to the compression ignition engine

Grab-Rogaliński K., Szwaja S.

Journal of KONES

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2016

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Vol. 23, No. 3

157--164

EN

The article presents results of tests performed in a combustion research unit (CRU) with the two following fuels: light fuel oil (LFO) and glycerol. The CRU is a constant volume combustion chamber machine equipped with an injection system based on that used in common-rail diesel engines with electromagnetic injectors. This machine allows to compare various combustion properties between fuels for specified parameters of injection and a combustion chamber as well. As it is known glycerol is a substance which is obtained from several technological processes such as production of biofuel thus in this way it can be treated as an alternative renewable fuel. The glycerol is characterized by low heating value of 16MJ/kg and relatively high density of 1261 kg/m3. However, its heating value by volume is higher if compared to other liquid fuels. From that reason decrease in energy that can be delivered with fuel is smaller which is approximately 16% lest than for LFO. The parameters measured during this research were: pressure increase, rate of pressure increase (ROPR), ignition delay (ID), main reaction delay (MRD), main combustion period (MCP), end of main combustion (EMC), end of combustion (EC), position of max ROPR (PMR) and max ROPR. The tests were performed with different injection parameters such as injection pressure, injection duration and injection delay as well as under various conditions in the CRU combustion chamber expressed by pressure and temperature. On the basis of these tests the comparison between LFO and glycerol was done. The results were presented in diagrams. The research shows that glycerol used as a fuel, to obtain the same output power, should be injected at higher amounts. Glycerol as a fuel cannot ignite itself, hence to provide combustion the pilot injection of another fuel have to be applied.

2

Synthesis and Characterization of a High Energy Combustion Agent (BHN) and Its Effects on the Combustion Properties of Fuel Rich Solid Rocket Propellants

Pang W.-Q., Zhao F.-Q., Xue Y.-N., Xu H.-X., Fan X.-Z., Xie W.-X., Zhang W., Lv J., Deluca L. T.

Central European Journal of Energetic Materials

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2015

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Vol. 12, no. 3

537--552

EN

A high energy combustion agent (tetraethylammonium decahydrodecaborate, BHN) was prepared by means of an ion exchange reaction (IER), and the prepared samples were characterized by the advanced diagnostic techniques of Scanning Electron Microscopy (SEM), X-ray diffraction (XRD), Thermogravimetric Analysis (TGA), and Differential Scanning Calorimetry (DSC) etc. The effects of BHN particles on the hazard and combustion properties of fuel rich solid propellants were investigated. The results showed that the BHN samples and fuel rich propellants containing BHN particles can be prepared successfully and solidified safely. The peak temperature of thermal decomposition and the heat of decomposition of the BHN samples prepared were 305.8 °C and 210.9 J•g-1 at a heating rate of 10 K•min-1, respectively. The burning rate and pressure exponent of fuel rich solid propellants decreases with increases in the fraction of BHN particles in the propellant formulation. Compared with the reference formulation (sample BP-1), the burning rate of the propellant with 10% mass fraction of BHN particles (sample BP-4) had decreased 30% at 3.0 MPa, and the pressure exponent had dropped from 0.44 to 0.41.

3

Effects Of The Thermal Activation Of Fuel On Energy Parameters And Toxicity Of Combustion Gases In The Marine Diesel Engine

Piaseczny L., Władyka W.

Journal of Polish CIMAC

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2008

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Vol. 3, no 1

9-13

EN

This paper concerns theoretical basis of the influence of temperature of fuel on its main parameters, which affect the efficiency and toxicity of combustion gases in the marine diesel engine. It also presents the results of own research, carried out on a single-cylinder test engine on the engine test stand. These researches aimed to determine the efficiency of applying the thermal activation of fuel to improve energy and ecological properties of the engine. Heating of fuel up to 150oC for the various values of torque and engine speed was applied. The test results indicated generally beneficial influence of fuel heating on the energy indexes and the decrease of exhausts emission.

4

Metody kalorymetryczne wyznaczania parametrów energetycznych gazu ziemnego

Demusiak G.

Nafta-Gaz

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2007

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R. 63, nr 5

329-340

PL

W artykule omówiono przyczyny wzrostu znaczenia kontroli właściwości energetycznych gazu ziemnego i przedstawiono bliżej wykorzystywane do tego celu metody kalorymetryczne, z zastosowaniem zarówno tradycyjnych kalorymetrów i wobbomierzy - z pomiarem temperatury spalin, jak i nowszych rozwiązań, opartych na wykorzystaniu zasady stechiometrii, z pomiarem stężenia tlenu w spalinach. Omówiono istotne zagadnienia normalizacyjne i prawne wpływające na sposób prowadzenia pomiarów. Przedstawiono wyniki analizy porównawczej wybranych rozwiązań technicznych kalorymetrów i wobbomierzy stosowanych do pomiaru właściwości energetycznych gazu ziemnego, z uwzględnieniem specyfiki wymagań krajowych. Dokonano porównania funkcjonalności metod kalorymetrycznych z innymi metodami pomiarowymi: z zastosowaniem chromatografii gazowej i technik korelacyjnych.

EN

The reasons for increasing the role of natural gas energy determination were presented in the paper. There were described measurement methods with application of traditional calorimeters, based on the flue gas temperature measurement and modern devices, based on stoichiometric rule, with oxygen concentration measurement. The standardization and legal aspects of natural gas combustion properties determination were discussed. The analysis of the review of chosen calorimeters and Wobbe Index meters was presented with special regards to domestic requirements. The results of comparison of calorimetric method with other measurement methods based on application of gas chromatography and correlative techniques were described.

5

Marine Auxiliary Diesel Engine Turbo-Charger Damage (Explosion) Cause Analysis

Chybowski L., Matuszak Z.

Journal of Polish CIMAC

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2007

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Vol. 2, no 2

99-105

EN

In the paper causes of a container ship auxiliary engine turbocharger self damage during its service at sea have been analyzed. The damaged turbocharger working elements have been presented. The direct reason of the turbocharger damage was its explosion. The damage cause analysis takes into consideration the possibility of stimuliaccumulation leading to the damage as well as damage causes overlapping and the influence of quality of fuel feeding the auxiliary engine. Eventually the turbocharger damage has been attributed to fuel quality. Probability of fuel seeping into exhaust manifold and scavenge air receiver due to injector needle suspension as well as ignition and combustible properties of fuel feeding the auxiliary engine have been focused on. Injector testing results achieved on trial stand and fuel quality analysis carried out by means of FIA-100/3 analyzer have been presented.