combustion engineering Articles

  • The effects of variable specific heats of working fluid on the performance of an irreversible Otto cycle

    The performance of an air-standard Otto cycle with variable specific heats of working fluid and heat resistance and friction irreversible losses is analysed by using finite-time thermodynamics. The relations between the power output and the compression ratio, between the thermal efficiency and the compression ratio, as well as the optimal relation between power output and the efficiency of the ...


    By Inderscience Publishers

  • Pragmatic Efficiency Limits for Internal Combustion Engines

    This article gives an overview of the thermodynamic principles demonstrating that the maximum efficiency theoretically possible with a hydrocarbon fueled internal combustion engine is one hundred percent. From this basis the focus turns to articulating irreversibilities that naturally occur within the processes of converting the chemical energy in the fuel into shaft work. These losses are ...


    By HORIBA Europe GmbH

  • Stationary Compression and Spark Ignition Internal Combustion Engine Rule Revisions Proposed

    Stationary Compression and Spark Ignition Internal Combustion Engine Rule Revisions Proposed On May 21, 2010, U.S. EPA proposed amendments to 40 CFR Part 60, Subparts IIII (Standards of Performance for Stationary Compression Ignition Internal Combustion Engines) and Subpart JJJJ (Standards of Performance ...


    By All4 Inc.

  • Experimental study of the effect of top-ring clearance volume on unburned hydrocarbon concentrations

    The clearance volume between the piston, the cylinder and the top compression ring in an internal combustion engine has a significant effect on the unburned hydrocarbon concentration. The high heat transfer from the burning mixture to the cylinder surface extinguishes the flame front, and this is the main reason for increased unburned hydrocarbon concentrations. The heat transfer between the ...


    By Inderscience Publishers

  • Performance evaluation of a hydrogen-ethanol fuelled engine

    The work presented in the paper is an attempt to evaluate the performance characteristics of a hydrogen?ethanol dual fuel combination with different percentage substitutions of hydrogen (i.e. 0-80% with an increment of 20% by volume) at three different compression ratios of 7:1, 9:1 and 11:1 with varying equivalence ratios. In the present study, experimental investigations have been carried out ...


    By Inderscience Publishers

  • Hydrogen energy for the transportation sector in China

    Hydrogen is a promising energy carrier for providing a clean, reliable and affordable energy supply. This paper provides a blueprint for the hydrogen energy in the transportation sector in the future of China. This paper is divided into three parts. The first part answers this question: why is China interested in hydrogen energy? The second part describes the possibility of a hydrogen fuel cell ...


    By Inderscience Publishers

  • Determination of optimum speed of an internal combustion engine by exergy analysis

    In this study, energy and exergy analysis are applied to the experimental data of an internal combustion engine operating on the conventional Otto cycle. The data are collected using an engine test unit which enables accurate measurements of fuel flow rate, combustion air flow rate, engine load, engine speed and all the relevant temperatures. Energy and exergy efficiencies are calculated for ...


    By Inderscience Publishers

  • Development and characterisation of small-scale rotary engines

    This paper describes the development and characterisation of small-scale rotary engines with displacements in the range of 781500 mm for portable applications in the range of 10200 W of power output. Small-scale combustion engines present a number of research challenges including manufacturing tolerances, sealing, thermal management, ignition, combustion efficiency and porting. Four engines have ...


    By Inderscience Publishers

  • Energy and exergy analyses of a spark-ignition engine

    In this paper, the performance of an internal combustion engine is evaluated at the steady-state condition by application of energy and exergy analysis using the experimental test results. The energy and exergy balances are calculated at different engine speeds. The results show that the heat rejection of energy and exergy flow increases with increasing engine speed. The exergy efficiencies are ...


    By Inderscience Publishers

  • Developments in Auxiliary Power for Vehicles

    Fuel cells are widely recognised as a technology of the future and as a potential replacement for the internal combustion engine in cars and other vehicles.This article looks at the potential for fuel cells to provide auxiliary power to vehicles, rather than primary motive power. Today, hydrogen-fuelled proton exchange membrane (PEM) type fuel cells, as illustrated in Figure 1, are being ...

  • A diesel compound HCCI combustion engine based on injection strategy control

    This paper presents a compound combustion technology of "Premixed Combustion" and "Lean Diffusion Combustion" for the purpose of realising the concept of homogeneous charge compression ignition (HCCI) combustion in a DI diesel engine. The premixed combustion is achieved by the technology of multi-pulse fuel injection. The start of pulse injection, injection-pulse number, injection period of each ...


    By Inderscience Publishers

  • Quantifying Combined Heat and Power (CHP) activity

    In CHP plants without heat rejection facilities power, output is complementary to the recovery of heat, and all activity is cogeneration. CHP plants with heat rejection facilities can operate a mix of cogeneration and condensing activities. Quantifying the energy flows of both activities properly requires knowledge of the design power-to-heat ratios of the CHP processes (steam and gas turbines, ...


    By Inderscience Publishers

  • Exergetic performance investigation of a turbocharged stationary diesel engine

    An exergetic assessment is reported of a turbocharged stationary diesel engine with a power output of about 19 MW. The system studied consists of a diesel engine, a turbine, a compressor, an intercooler and a radiator. The sites of exergy destructions are identified and quantified and the exergy efficiencies of various components are determined. The effects of inlet air temperature and pressure ...


    By Inderscience Publishers

  • Energy management system for a PV assisted conventional vehicle

    In this paper, a novel algorithm is proposed, for effective energy management of a conventional internal combustion engine vehicle, consisting of a photovoltaic (PV) source and battery also to power its electrical load. It offers a more practical and eco friendly solution of fossil fuel consumption reduction as compared to presently available alternatives such as electric/hybrid electric ...


    By Inderscience Publishers

  • Exergetic cost analysis and sustainability assessment of an Internal Combustion Engine

    This study deals with exergy cost analysis and sustainability assessment of a diesel engine, which runs with diesel no. 2 and two different biodiesel fuels at 1400 1/min test speed. Maximum total cost per exergy flow input rate and total exergy cost are found to be 12.5549 $/kW•year and 1728.312 $/year for one of the biodiesel fuels, respectively, while minimum values of these costs are ...


    By Inderscience Publishers

  • Are Electric Motors Reliable?

    Electric motors are mechanically simple devices with a relatively small number of moving parts. This, combined with their low vibration output, makes electric motors very reliable power supplies if used properly and within their specified ratings limits. In applications where either electric or combustion motors are viable options, the electric motor is often the more reliable solution. ...


    By Power Electric

  • Analytical and experimental study on bending vibration of internal combustion engines shafting system based on wave equations

    This paper proposes a new analytical approach to study the bending vibration of N step shafting system. Changes of the shaft step properties under rotary condition are governed by two–dimensional wave equations. The source of the bending vibration is first analysed. Then strain and stress equations of the spinning shaft are established. After Hamilton principle is applied, a two–dimensional wave ...


    By Inderscience Publishers

  • Evaluating advanced automotive energy technologies: a multivariate mobility contribution metric

    Mobility technology is beginning to shift from gasoline-fuelled, internal combustion engines to a variety of alternate fuels and powertrains, including hybrid and fuel cell vehicles. The benefits and/or limitations of many of these technologies are not well characterised by a simple fuel economy metric: mobility is a complex system requiring a multivariate systems measure, especially ...


    By Inderscience Publishers

  • Studies on behaviour of a DI diesel engine fuelled with bio oil biodiesel emulsions

    This paper discusses the results on the use of Jatropha methyl ester (JME) - Wood pyrolysis oil (WPO) emulsion as an alternative fuel in a compression ignition (CI) engine. Three different emulsions were prepared by adding WPO in 5%, 10% and 15% by volume with JME 95%, 90% and 85% by volume respectively using a surfactant Span 20 at 4% on volume basis. The engine behaviour in terms of the ...


    By Inderscience Publishers

  • Assessment of a CHP system based on economical, fuel consumption and environmental considerations

    Combined heat and power (CHP) systems which are able to produce heating and power simultaneously, are getting more attention since they have many economical and environmental benefits. CHP systems for buildings are an important application of CHP on various systems designs. In this study, we have investigated a CHP system applicable for the building of Azad University of Shahrood. The prime mover ...


    By Inderscience Publishers

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