fuel analysis Articles
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Exergetic cost analysis of a CI engine fuelled with petrodiesel and palm and karanja biodiesels: a comparative assessment
This paper deals with evaluation of suitable fuel for a 4–stroke single–cylinder diesel engine operated at steady state amongst three fuels - petrodiesel (PD), palm biodiesel (PB) and karanja biodiesel (KB) - through exergy, economic and thermoeconomic analyses. Based on exegy analysis, PB is found to be the best fuel with highest exergetic efficiencies 26.02%. However, PD evolves to be best fuel ...
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Thorium dioxide as a nuclear fuel: a scientometric analysis
The present study is aimed at analysing the growth of publications on thorium dioxide (ThO2). INIS database is used as a source to analyse the focused areas of this field for the period 1970–2011. The database contained 2337 publications on thorium dioxide. The study analysed the broad features of literature on thorium dioxide, focusing on year–wise publications, highly productive countries, ...
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Methods of oil/fuel analysis
PC GlobeCore can propose you to make a reclaiming test of yours example of fuel (oil) to verify the possibility of clean it. If the oil is contaminated and not suitable for use, filtration can be recommended. Or, you can also make this test by yourself using our laboratory/test-bench transformer oil vacuum regeneration system UVR. The regenerated samples exceeded yours expectations. Average ...
By GlobeCore PC
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Energetic and exergetic performance assessment of a turboprop engine at various loads
It is necessary to understand the mechanisms that have enabled improvements of performance parameters such as thermodynamics efficiencies, thrust or power, specific fuel consumption and specific power in aero engines, thus reducing environmental impact. In this study, a thermodynamic analysis of a turboprop engine is performed at full and partial load conditions. The maximum overall and exergy ...
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Case Study: Monitoring Fuel Treatment with On-Site Fuel Analysis
Version 8 of our industry leading SpectrOil Optical Emission Spectrometers offers significant performance improvements and enhanced productivity. In particular the sensitivity of the instrument has been improved markedly to allow detection of trace metals down to the part per billion (ppb) level. This capability is particularly important to power generators using liquid fuel, as high levels of ...
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SpectrOil — The Accurate and Dependable Choicefor In-Service Oil And Fuel Analysis
Introduction The basis of modern oil analysis programs is the use of optical emission spectroscopy (OES) to measure the ppm (parts per million) levels of wear metals, contaminants, and additives in oil samples. Whatever an oil lab may need to measure, multi-elemental analysis is the core of an in-service oil analysis program. This paper gives an overview of Rotating Disc Electrode Optical ...
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Exergetic performance of a cylindrical methane–air microcombustor under various inlet conditions
The entropy generation analysis is performed on a methane–air cylindrical microcombustor. The combustor is studied under different fuel–air equivalence ratios and two different inlet velocities. The results reveal that entropy generation due to heat transfer has the highest contribution to the total exergy destruction. Besides, the chemical and mixing entropy generations have the next greatest ...
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Dynamic behaviour of fuel cost component in total electricity cost of nuclear power plants with WWER-type power units
This paper describes the technical and economic analyses of changes in the fuel component of prime electrical energy cost that are caused by implementing various versions of nuclear fuel design and nuclear fuel cycle schemes in WWER-440 power reactors.Keywords: WWER reactors, nuclear power plants, NPP, nuclear energy, fuel components, technical analysis, economical analysis, risk assessment, ...
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Combustion, performance and emission characteristics of a DI CI engine using biodiesel with varied fatty acid composition
Five Biodiesel produced from different vegetable oils were tested on a diesel engine to study the effect of biodiesel fatty acid composition specifically unsaturated composition on the engine combustion. The results from fuel analysis show that biodiesel (93% unsaturated fatty acid ester composition) with 55% linolenic ester has a higher density of 0.89 kg/m³, lower viscosity of 3.8 cSt, heating ...
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Second law analyses on oxy-fuel combustion of gaseous fuels
The exergy losses in the adiabatic premixed oxy-fuel combustion are quantitatively analysed. The global exergy loss decreases with increasing equivalence ratio. The exergy loss of chemical reaction is comparable to that of internal thermal energy exchange for low equivalence ratio while that of mixing process is negligible. To keep similar thermodynamic characteristics of conventional combustion, ...
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Guide for Measuring Fuel Dilution in Lubricating Oil
Fuel dilution in oil can cause serious engine damage. High levels of fuel (>2%) in a lubricant can result in decreased viscosity, oil degradation, loss of dispersancy, and loss of oxidation stability. Fuel dilution is one of the most important lubricant failure modes in internal combustion engines. It usually occurs due to improper fuel-to-air ratio. Fuel dilution can also occur due to ...
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Thermal behaviour study of senakin coal and Refuse Derived Fuel (RDF) blends during pyrolysis using thermogravimetric analysis
Preliminary Thermogravimetric (TG) studies of pyrolysed Refuse Derived Fuel (RDF)–coal blends (20 to 80%) at various heating rates, 20, 40, 60 °C•min–1 have been performed to develop an efficient locally sourced renewable solid fuel. The characteristics of the coal/RDF blends followed those of the parent fuels in additive manner. Among the tested blends, 50:50 blends showed the optimum blend ...
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Consumption analysis of Solid Oxide Fuel Cells
The characteristics of the Solid Oxide Fuel Cell (SOFC) were introduced. The SOFC system can be divided into ten sections based on the Second Law of Thermodynamics. The fuel specific consumption was taken as the primary indicator to investigate the specific consumption for each section. The Energy-flow Framework Diagram (EFD) was undertaken to modify the system, such as controlling the operating ...
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Thermodynamic modelling of a proton exchange membrane fuel cell
This paper presents the thermodynamic modelling of a proton exchange membrane (PEM) fuel cell at various operating conditions through energy and exergy analyses. In addition, the correlations and equations available in literature were used to determine thermodynamic irreversibilities in the PEM fuel cell at different operating conditions such as cell temperature, pressures of anode and cathode, ...
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Shannon entropy for energy technologies ex-ante evaluation
Most of the international literature has used Shannon entropy to measure the information gap. In this paper we propose a method that uses Shannon entropy to evaluate ex-ante energy technologies in a decision making process. It was called ITEM, i.e., Information Theory Energy technology ex-ante evaluation Method. The aim was to have a suitable tool for characterising the most critical project ...
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Modeling Analysis of Fuel Sprays
Current engine development processes in which computations play an important role have sought for numerical models which can accurately represent phenomena in spray combustion. The authors have developed original sub-models taking into account the effects of extensive spray combustion phenomena including nozzle cavitation, droplet breakup behavior, multi-component evaporation process, spray-wall ...
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Framing land use changes in the expansion of Brazilian ethanol production
Internationally land use change for the expansion of ethanol production in Brazil has been associated with deforestation and CO2 emissions. This association has been denied by important Brazilian actors. To clarify the diverging opinions, a study was made of the expansion of sugarcane plantations. Frame analysis was the tool selected. The conflicting frames identified were named 'ethanol as ...
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Effect of reforming on the overall efficiency of a solid oxide fuel-cell based power plant system fed by methane
In the present work, energy and exergy system analysis are used to estimate the thermodynamic performance of a SOFC system fuelled by methane. More precisely, the present work examines in detail the influence of the presence or absence of the reformer within the whole apparatus and the consequent energy and exergy losses due to the reforming process. It was found that the exergetic efficiency for ...
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Thermodynamic performance simulation of a coal gasification and SOFC based combined cogeneration plant by energy and exergy analyses
This paper presents a thermodynamic model of a combined cogeneration plant that employs a coal gasifier, a gas cooler and a solid oxide fuel cell (SOFC) upstream of the gas turbine and a downstream HRSG to generate process steam at low pressure. Simulated performance of the plant with respect to variations in some design and operating parameters has been reported. While energy analysis indicates ...
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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 ...
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