Specific Fuel Consumption

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Wenjei Yang - One of the best experts on this subject based on the ideXlab platform.

  • reduction of Specific Fuel Consumption in gas turbine power plants
    Energy Conversion and Management, 1997
    Co-Authors: Wenjei Yang
    Abstract:

    This paper presents a brief review on recent advances in gas turbine technology and various means for reduction in Specific Fuel Consumption. An intercooled recuperative combined cycle, with closed-loop steam cooling breaks the 60% barrier in thermal efficiency. An innovative chemical gas turbine is in development to achieve a thermal efficiency of over 60%. Various means for reduction in Specific Fuel Consumption are discussed.

Ligang Wang - One of the best experts on this subject based on the ideXlab platform.

  • a modified Specific Fuel Consumption analysis for predicting the rearrangement of energy system structures
    Energy Procedia, 2014
    Co-Authors: Ligang Wang, Shengwei Huang, Lingnan Wu, Ningling Wang, Changqing Dong, Yongping Yang, George Tsatsaronis
    Abstract:

    Abstract One variation of exergy analysis, Specific Fuel Consumption (SFC) analysis, was modified according the advanced exergy analysis, where exergy destructions within each component were split into endogenous/exogenous and avoidable/unavoidable parts, and by combining the energy-savings effects of each component. The modified analysis approach can help locate not only the weak points at the component level but also certain bottlenecks from the topology viewpoint, which may indicate adding or deleting some components, or enhancing the thermodynamic interactions between different process or subsystems. The modified approach was then applied to a conventional coal-fired power plant. The detailed spatial distribution of SFC within the current system at different partial-load conditions were deeply discussed at both component and process levels. Further splitting of SFC and the energy-saving effects of each process are also obtained and discussed. The results show that combustion and heat-and-mass transfer processes have the largest SFC. Heat-and-mass transfer process and the vent process have the greatest avoidable SFCs. The closer the component to the final product, the larger its influence on the overall performance, and, thus, a small improvement to these components may lead to a large reduction in the overall Fuel Consumption. More effective energy-saving measures of coal-fired power plants should focus on the match of heat transfer at intermediate-and-low temperature level and the breakage of the isolation of heat transfer subsystems, especially enhancing the interaction between the air preheating process and feedwater preheating process.

George Tsatsaronis - One of the best experts on this subject based on the ideXlab platform.

  • a modified Specific Fuel Consumption analysis for predicting the rearrangement of energy system structures
    Energy Procedia, 2014
    Co-Authors: Ligang Wang, Shengwei Huang, Lingnan Wu, Ningling Wang, Changqing Dong, Yongping Yang, George Tsatsaronis
    Abstract:

    Abstract One variation of exergy analysis, Specific Fuel Consumption (SFC) analysis, was modified according the advanced exergy analysis, where exergy destructions within each component were split into endogenous/exogenous and avoidable/unavoidable parts, and by combining the energy-savings effects of each component. The modified analysis approach can help locate not only the weak points at the component level but also certain bottlenecks from the topology viewpoint, which may indicate adding or deleting some components, or enhancing the thermodynamic interactions between different process or subsystems. The modified approach was then applied to a conventional coal-fired power plant. The detailed spatial distribution of SFC within the current system at different partial-load conditions were deeply discussed at both component and process levels. Further splitting of SFC and the energy-saving effects of each process are also obtained and discussed. The results show that combustion and heat-and-mass transfer processes have the largest SFC. Heat-and-mass transfer process and the vent process have the greatest avoidable SFCs. The closer the component to the final product, the larger its influence on the overall performance, and, thus, a small improvement to these components may lead to a large reduction in the overall Fuel Consumption. More effective energy-saving measures of coal-fired power plants should focus on the match of heat transfer at intermediate-and-low temperature level and the breakage of the isolation of heat transfer subsystems, especially enhancing the interaction between the air preheating process and feedwater preheating process.

Abdullah Uzun - One of the best experts on this subject based on the ideXlab platform.

  • a parametric study for Specific Fuel Consumption of an intercooled diesel engine using a neural network
    Fuel, 2012
    Co-Authors: Abdullah Uzun
    Abstract:

    Abstract Turbocharging is a process wherein the amount of oxygen used in a combustion reaction is increased to raise output and decrease Specific Fuel Consumption. On account of this, Fuel economy and thermal efficiency are more important for all engines. The use of an intercooler reduces the temperature of intake air to the engine, and this cooler and denser air increases thermal and volumetric efficiency. Most research projects on engineering problems usually take the form of experimental studies. However, experimental research is relatively expensive and time consuming. In recent years, Neural Networks (NNs) have increasingly been used in a diverse range of engineering applications. In this study, various parametric studies are executed to investigate the interrelationship between a single variable and two steadies and two constant parameters on the brake Specific Fuel Consumption (BSFC, g/kW h). The variables selected are engine speed, load and Crankshaft Angel (CA). The data used in the present study were obtained from previous experimental research by the author. These data were used to enhance, train and test a NN model using a MATLAB-based program. The results of the NN based model were found to be convincing and were consistent with the experimental results. The trained NN based model was then used to perform the parametric studies. The performance of the NN based model and the results of parametric studies are presented in graphical form and evaluated.

  • the effects of intercooling on performance of a turbocharged diesel engine s Specific Fuel Consumption with neural network
    2010
    Co-Authors: Abdullah Uzun
    Abstract:

    Currently, Fuel economy and thermal efficiency are more important to all engines. Efficiency is increased with cooled air by intercooler. Most of researches regarding engineering problems generally deal with experimental studies. But, the experimental researches are quite expensive and time consuming. In the last decades, Neural Networks (NN) had been used increasingly in a variety of engineering applications. The objective of the study is to investigate the adequacy of neural networks (NN) as a quicker, more secure and more robust method to determine the effects of intercooling on performance of a turbocharged diesel engine’s Specific Fuel Consumption. The data are obtained from experimental research that is performed by the author. NN based model is developed, trained and tested through a based MATLAB program by using of these data. In the study, break Specific Fuel Consumption (BSFC, g/kWh) was analysed with intercooling and without intercooling. The statistical analysis is performed to explain the performance of the NN based model. NN based model outputs are also compared with the experimental results. The statistical results and the comparison demonstrated that the NN based model is highly successful to determine the effects of intercooling on performance of a turbocharged diesel engine’s Specific Fuel Consumption.

A Joharchi - One of the best experts on this subject based on the ideXlab platform.

  • experimental investigation of the exhaust gas recirculation effects on irreversibility and brake Specific Fuel Consumption of indirect injection diesel engines
    Applied Thermal Engineering, 2010
    Co-Authors: Mohsen Ghazikhani, M E Feyz, A Joharchi
    Abstract:

    Abstract An experimental study was carried out to investigate the effect of using Exhaust Gas Recirculation (EGR) on various exergy terms of an IDI diesel engine cylinder. In this paper also the effectiveness of total in-cylinder irreversibility on Brake Specific Fuel Consumption (BSFC) in a diesel engine is investigated. To serve this aim an exergy analysis is conducted on the engine cylinder which provides all the availability terms by which the evaluation of in-cylinder irreversibilities is possible. The availability terms including heat transfer, inlet and exhaust gases and work output are presented during the engine operation at different load and speeds. To clarify the effect of using EGR in each case, EGR is introduced to the cylinder at various ratios during the tests. Finally, the dependence of total in-cylinder irreversibility and engine BSFC at particular engine operating conditions is introduced and the variations are compared. The results show that using EGR mostly increases the total in-cylinder irreversibility mainly due to extension of the flame region which reduces maximum combustion temperature. Also, the results revealed that the variations of the total in-cylinder irreversibility and engine BSFC follow the same trend especially at high load conditions.