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68 results for “lean”
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Research ArticleOpen accessIn the abstractSulfur Recovery from Acid Gas Using the Claus Process and High Temperature Air Combustion (HiTAC) TechnologyMohamed Sassi, Ashwani K. GuptaSulfur-bearing compounds are very detrimental to the environment and to industrial process equipment. They are often obtained or formed as a by-product of separation and thermal processing of fuels containing sulfur, such as coal, crude oil and natural gas. The two sulfur compounds, which need special attention, are: hydrogen sulfide (H2S) and sulfur dioxide (SO2). H2S is a highly corrosive … …American Journal of Environmental Sciences, Vol. 4, Issue 5 · 31 Oct 2008 · 17,613 accessesView PDFCite
Research ArticleOpen accessIn the abstractNumerical Simulation of Liquid Bio-Fuel Combustion in an EGR Equipped Micro Gas TurbineMaria Cristina Cameretti, Raffaele Tuccillo, Fabrizio Reale, Renzo PiazzesiThis paper focuses the attention to the possibility of a correct combustion close to the flameless regime, even in the presence of lower calorific value fuels like those that can be found with high concentrations in the bio-mass derived ones. In addition, the authors pay attention to the nitric oxide control by means of an optimal choice of the pilot … …American Journal of Applied Sciences, Vol. 12, Issue 7 · 4 Aug 2015 · 6,718 accessesView PDFCite
Research ArticleOpen accessIn the abstractA GENETIC ALGORITHM FOR A SIMULTANEOUS OPTIMISATION OF COST-RISK REDUCTION UNDER A JUST-IN-TIME ADAPTIONFaraj El Dabee, Romeo Marian, Yousef AmerJust-In-Time (JIT) as a lean manufacturing approach plays a significant role in minimising costs and performances of products and services supplied to the global marketplace. However, there are many potential risks that cause significant disruptions to all supply chain members. This study proposes a genetic approach for optimising a novel mathematical model for simultaneously minimising the total cost of a … …Journal of Computer Science, Vol. 10, Issue 12 · 26 Dec 2014 · 7,695 accessesView PDFCite
Research ArticleOpen accessIn the abstractAn Investigation of Compressed Natural Gas Engine for Nitrogen Oxides ReductionP. M. Diaz, B. Durga PrasadProblem statement: This study describes the use of Reformer Gas (RG) to alter NOx emission in a CNG-fueled HCCI engine. Comparison with diesel, natural gas has a very high octane number (≈120) and high auto-ignition temperature (≈600°C). Composed mostly of methane, natural gas is the only common fuel to manifest relatively pure, single-stage combustion. Other fuels have stronger low-temperature reaction … …American Journal of Applied Sciences, Vol. 9, Issue 7 · 15 May 2012 · 7,299 accessesView PDFCite
Research ArticleOpen accessIn the abstractImprovement of the Runner Design of Francis Turbine using Computational Fluid DynamicsSuthep Kaewnai, Somchai WongwisesProblem statement: The objective of this study is to improve runner design of the Francis turbine and analyze its performance with the Computational Fluid Dynamics (CFD) technique. Approach: A runner design process uses a direct method with the following design conditions: flow rate of 3.12m3/sec head of 46.4 m and speed of 750 rpm or dimensionless specific speed of 0.472. … …American Journal of Engineering and Applied Sciences, Vol. 4, Issue 4 · 25 Jan 2012 · 8,924 accessesView PDFCite
Research ArticleOpen accessIn the abstractSystem of One to Three Umpire Security System for Wireless Mobile Ad hoc NetworkC. Rajabhushanam, A. KathirvelProblem statement: A Mobile Ad Hoc Network (MANET) is a self-created self-organized and self-administering set of nodes connected via wireless links without the aid of any fixed infrastructure or centralized administrator. Protecting the network layer from malicious attacks is an important and challenging issue in both wired and wireless networks and the issue becomes even more challenging in the case … …Journal of Computer Science, Vol. 7, Issue 12 · 19 Oct 2011 · 7,244 accessesView PDFCite
Research ArticleOpen accessIn the abstractAdiponectin mRNA Expression in the Cat (Felis domesticus)Angela L. Lusby, Stephen A. Kania, Joseph W. Bartges, Claudia A. KirkProblem statement: Adiponectin is a hormone expressed from adipose tissue in people, rodents and dogs. Adiponectin has anti-inflammatory action with beneficial effects on cardiovascular health and insulin sensitivity. With increasing fat mass, adiponectin concentrations paradoxically decrease. Adiponectin’s role in metabolism and diabetes mellitus is of interest in feline medicine because cats are susceptible to developing type II diabetes with weight … …American Journal of Animal and Veterinary Sciences, Vol. 5, Issue 4 · 27 Dec 2010 · 7,787 accessesView PDFCite
Research ArticleOpen accessIn the abstractTransient in-Cylinder Gas Flow Characteristics of Single Cylinder Port Injection Hydrogen Fueled EngineM. M. Rahman, Khalaf I. Hamada, M. M. Noor et al.Problem statement: The variation of the in-cylinder gas flow characteristics for single cylinder port injection hydrogen fueled internal combustion engine was investigated through transient state simulation. Approach: One dimensional gas dynamics was described the flow and heat transfer in the components of the engine model. Special attention is paid to selection and correction of heat transfer correlation which describe of … …American Journal of Applied Sciences, Vol. 7, Issue 10 · 31 Oct 2010 · 8,653 accessesView PDFCite
Research ArticleOpen accessIn the abstractMost Used Rock Mass Classifications for Underground OpeningAl-Jbori A’ssim, Zhang Y. XingProblem statement: Rock mass characterization is an integral part of rock engineering practice. The empirical design methods based on rock mass classifications systems provide quick assessments of the support requirements for underground excavations at any stage of a project, even if the available geotechnical data are limited. The underground excavation industry tends to lean on empirical approaches such as rock … …American Journal of Engineering and Applied Sciences, Vol. 3, Issue 2 · 30 Jun 2010 · 7,281 accessesView PDFCite
Research ArticleOpen accessIn the abstractIn-Cylinder Heat Transfer Characteristics of Hydrogen Fueled Engine: A Steady State ApproachM. M. Rahman, Khalaf I. Hamada, M. M. Noor et al.This study presents in-cylinder heat transfer characteristics of a single cylinder port injection Hydrogen fueled Internal Combustion Engine (H2ICE) using a steady state approach. Problem statement: The differences in characteristics between hydrogen and hydrocarbon fuels are led to the difference in the behavior of physical processes during engine cycle. One of these processes is the in-cylinder heat transfer. Approach: One … …American Journal of Environmental Sciences, Vol. 6, Issue 2 · 30 Apr 2010 · 7,431 accessesView PDFCite