gas engine technology




Development of high efficiency Miller cycle gas engine
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The output of gas engines for cogeneration mainly ranges from 100 to 1 000 kW. The present gas engines are broadly classified in two types: lean-burn system (1) and stoichiometric air-fuel ratio combustion system, with the lower output engines using the

Stoichiometric operation of a gas engine utilizing synthesis gas and EGR for NOx control
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This paper is a companion paper to a recently published ASME paper ASME Paper No. 97- ICE-64 describing the effects of natural gas /syngas mixtures on engine performance and emissions during lean-burn operation. As a result, parts of the Introduction and catalyst

Experimental investigation of performance and emission of a sequential port injection natural gas engine
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This paper presents the results obtained from running a 1.5 Liter, 4-cylinder spark ignition engine with gasoline and compressed natural gas (CNG). Performance and emissions results were recorded under steady state operating conditions. The engine was converted to

Analysis of exhaust emissions of natural gas engine by using response surface methodology
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Experiments were conducted to investigate the engines emission at the different operating conditions. The tests were conducted by varying the engine speed, throttle opening and operating time. During the experimental investigation, the operating variables were varied

Review on exhaust gas heat recovery for IC engine
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The increasingly worldwide problem regarding rapid economy development and a relative shortage of energy, the internal combustion engine exhaust waste heat and environmental pollution has been more emphasized heavily recently. Out of the total heat supplied to the

Design and development of a direct injected, glow plug ignition-assisted, natural gas engine
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Background Natural gas has emerged as a low-cost, clean burning alternative fuel. The majority of natural gas engines operate on the Otto cycle utilizing a premixed fuel/air charge and a spark for combustion initiation. While this type of engine has significant NOx and

On the estimation of power from a diesel engine converted for gas operation a simple analysis
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In this paper, major factors influencing the power output from a gas engine are utilized to predict the power output from a diesel engine converted to gas operation using various gaseous fuels. The primary factors chosen are the gas calorific value, compression ratio

Prognostics/diagnostics for gas turbine engine bearings
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Current aircraft maintenance practice relies on highly conservative life estimates for critical gas turbine engine components to ensure that they are replaced prior to failure. While this practice has achieved extremely low failure rates. it also reduces aircraft availability and

Gas turbine engine mainshaft roller bearing-system analysis
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An interdisciplinary systems analysis is presented for high-speed gas turbine engine mainshaft roller bearings which will enable the designer to meet the demands for ever higher rotative speeds and operating temperatures. The latest elastohydrodynamic

Development of dual fuel single cylinder natural gas engine an analysis and experimental investigation for performance and emission
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The present study reports the experimental investigations carried and upgradation of 395 cc air cooled engine to dual fuel (CNG/Gasoline) application. The original 395 cc direct injection naturally aspirated, air cooled diesel engine was first converted to run on Gasoline

Formaldehyde characterization utilizing in-cylinder sampling in a large bore natural gas engine
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This research addresses the growing need to better understand the mechanisms through which engine -out formaldehyde is formed in two-stroke cycle large bore natural gas engines. The investigation is performed using a number of different in-cylinder sampling

Gas turbine engine health monitoring and prognostics
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A prototype health monitoring and prognostic system for the gas turbine engine on the US Army M1 Abrams tank is discussed. Comprising a set of sensors mounted on the turbine engine , a data acquisition system, and a computer to process the information, the system

Computational modeling of natural gas injection in a large bore engine
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The topic of this paper is the computational modeling of gas injection and in-cylinder mixing in a large bore natural gas fueled engine . Natural gas fueled engines have been used for many years in stationary applications such as gas compression and electric power

Hydrogen addition for improved lean burn capability on natural gas engine
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Lean burn spark ignition (SI) engines powered by natural gas is an attractive alternative to the Diesel engine , especially in urban traffic, where reduction of tailpipe emissions are of great importance. A major benefit is the large reduction in soot (PM). Lean burn spark

Effect of exhaust gas recirculation (EGR) on the performance and emission characteristics of diesel engine with sunflower oil methyl ester
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Transesterified fuels (biodiesel) from vegetable oils are alternative fuels for diesel engines. They are renewable and offer potential reduction in CO and HC emissions due to higher O2 contents in vegetable oil. Many research studies have reported that exhaust from biodiesel

Development of a hydrogen combustor for a microfabricated gas turbine engine
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As part of an effort to develop a new generation of micro heat engines, a program is underway to fabricate a gas turbine engine capable of producing 50W of electrical power in a package less than one cubic centimeter in volume. This paper focuses on the combustor

New ECOWILL a new generation gas engine micro-CHP
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The ECOWILL, a micro-CHP system using an internal combustion gas engine , was unveiled in Japan in 2003 as the worlds first mass-market product of its kind and has succeeded in establishing a new market in micro-CHP for household use . The ECOWILL consists of

A kinetic investigation of the role of changes in the composition of natural gas in engine applications
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The influence of variations in the composition of natural gas on the ignition and combustion processes in engines is investigated. Particular attention is given to changes in the relatively small concentrations of high molar mass alkanes that may be present in the fuel. A detailed

Syngas Treatment Unit for Small Scale Gasification-Application to IC Engine Gas Quality Requirement.
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Gasification is a process that converts carbonaceous materials (coal, biomass, organic waste) into carbon monoxide and hydrogen by reacting the raw material at high temperatures with a controlled amount of oxygen and/or steam. The resulting gas mixture


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