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Arif Hepbasli - One of the best experts on this subject based on the ideXlab platform.
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thermodynamic and thermoeconomic analyses of a trigeneration trigen system with a gas diesel Engine Part i methodology
Energy Conversion and Management, 2010Co-Authors: Ozgur Balli, Haydar Aras, Arif HepbasliAbstract:This paper consists of two Parts. Part 1 deals with the thermodynamic and thermoeconomic methodology of a trigeneration (TRIGEN) system with a rated output of 6.5 MW gas–diesel Engine while the application of the methodology is presented in Part 2. The system has been installed in the Eskisehir Industry Estate Zone in Turkey. Thermodynamic methodology includes the relations and performance parameters for energy and exergy analysis, while thermoeconomic methodology covers the cost balance relations, cost of products and thermodynamic inefficiencies, relative cost difference and exergoeconomic factor.
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thermodynamic and thermoeconomic analyses of a trigeneration trigen system with a gas diesel Engine Part ii an application
Energy Conversion and Management, 2010Co-Authors: Ozgur Balli, Haydar Aras, Arif HepbasliAbstract:The paper is Part 2 of the study on the thermodynamic and thermoeconomic analyses of trigeneration system with a gas–diesel Engine. In Part 1, thermodynamic and thermoeconomic methodologies for such a comprehensive analysis were provided, while this paper applies the developed methodology to an actual TRIGEN system with a rated output of 6.5 MW gas–diesel Engine installed in the Eskisehir Industry Estate Zone, Turkey. Energy and exergy efficiencies, equivalent electrical efficiency, the Public Utility Regulatory Policies Act (PURPA) efficiency, fuel energy saving ratio, fuel exergy saving ratio and other thermodynamic performance parameters are determined for the TRIGEN system. The efficiencies of energy, exergy, PURPA and equivalent electrical efficiency of the entire system are found to be 58.97%, 36.13%, 45.7% and 48.53%, respectively. For the whole system and its components, exergetic cost allocations and various exergoeconomic performance parameters are calculated using the exergoeconomic analysis based on specific exergy costing method (SPECO). The specific unit exergetic cost of the net electrical power, heat energy in the Factory Heating Center (FHC) heating, heat energy in the Painting Factory Heating (PFH) and chilled water in the absorption chiller (ACh) produced by the TRIGEN system are obtained to be 45.94 US$/GJ, 29.98 US$/GJ, 42.42 US$/GJ and 167.52 US$/GJ, respectively.
Wieslaw Tarelko - One of the best experts on this subject based on the ideXlab platform.
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NOx emission from a two-stroke ship Engine: Part 2 – Laboratory test
Applied Thermal Engineering, 2009Co-Authors: Jerzy Kowalski, Wieslaw TarelkoAbstract:International audienc
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NOx emission from a two-stroke ship Engine. Part 1: Modeling aspect
Applied Thermal Engineering, 2009Co-Authors: Jerzy Kowalski, Wieslaw TarelkoAbstract:International audienc
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NOx emission from a two-stroke ship Engine: Part 2 – Laboratory test
Applied Thermal Engineering, 2008Co-Authors: Jerzy Kowalski, Wieslaw TarelkoAbstract:Abstract International regulations force ship owners to monitor the NOx emission from Engines during sea operational use of ships, but standard equipped Engine rooms has not installed any measurement equipment to analyze of exhaust gases. According to these regulations, we proposed a simple method to estimation of NOx emission without direct measurement, based on the measurements of working Engine parameters. In this paper, we present the effect of laboratory test to verification adequacy of the developed model. In this aim, we carried out tests on the two-stroke, one-cylinder, and loop scavenged diesel Engine. During tests the Engine operated with the various rotational speed, load, and changing air/fuel equivalence ratio. The comparison of the results of calculations with conducted tests showed the estimation errors in intervals 1.8% to 11% in dependence from the substitute molar compositions of fuels.
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NOx emission from a two-stroke ship Engine. Part 1: Modeling aspect
Applied Thermal Engineering, 2008Co-Authors: Jerzy Kowalski, Wieslaw TarelkoAbstract:Abstract International Maritime Organization regulations forces ship owners to measure NOx emission from ship Engines, but standard equipped Engine rooms has not installed any usable apparatus to analyze of exhaust gases. In this paper, we propose a method of NOx emission estimation based on the measurements of working parameters of two-stroke ship Engine. This estimation consists of both the model enabling to determine a temperature and model of composition of a gas mixture in the combustion chamber of the Engine. Application of such model does not require carrying out direct measurements of Engine exhaust gases by exhaust gas analyzers. For the developed method, results of Engine working parameters should be sufficient to estimate the NOx emission according to IMO regulations.
Ozgur Balli - One of the best experts on this subject based on the ideXlab platform.
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thermodynamic and thermoeconomic analyses of a trigeneration trigen system with a gas diesel Engine Part i methodology
Energy Conversion and Management, 2010Co-Authors: Ozgur Balli, Haydar Aras, Arif HepbasliAbstract:This paper consists of two Parts. Part 1 deals with the thermodynamic and thermoeconomic methodology of a trigeneration (TRIGEN) system with a rated output of 6.5 MW gas–diesel Engine while the application of the methodology is presented in Part 2. The system has been installed in the Eskisehir Industry Estate Zone in Turkey. Thermodynamic methodology includes the relations and performance parameters for energy and exergy analysis, while thermoeconomic methodology covers the cost balance relations, cost of products and thermodynamic inefficiencies, relative cost difference and exergoeconomic factor.
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thermodynamic and thermoeconomic analyses of a trigeneration trigen system with a gas diesel Engine Part ii an application
Energy Conversion and Management, 2010Co-Authors: Ozgur Balli, Haydar Aras, Arif HepbasliAbstract:The paper is Part 2 of the study on the thermodynamic and thermoeconomic analyses of trigeneration system with a gas–diesel Engine. In Part 1, thermodynamic and thermoeconomic methodologies for such a comprehensive analysis were provided, while this paper applies the developed methodology to an actual TRIGEN system with a rated output of 6.5 MW gas–diesel Engine installed in the Eskisehir Industry Estate Zone, Turkey. Energy and exergy efficiencies, equivalent electrical efficiency, the Public Utility Regulatory Policies Act (PURPA) efficiency, fuel energy saving ratio, fuel exergy saving ratio and other thermodynamic performance parameters are determined for the TRIGEN system. The efficiencies of energy, exergy, PURPA and equivalent electrical efficiency of the entire system are found to be 58.97%, 36.13%, 45.7% and 48.53%, respectively. For the whole system and its components, exergetic cost allocations and various exergoeconomic performance parameters are calculated using the exergoeconomic analysis based on specific exergy costing method (SPECO). The specific unit exergetic cost of the net electrical power, heat energy in the Factory Heating Center (FHC) heating, heat energy in the Painting Factory Heating (PFH) and chilled water in the absorption chiller (ACh) produced by the TRIGEN system are obtained to be 45.94 US$/GJ, 29.98 US$/GJ, 42.42 US$/GJ and 167.52 US$/GJ, respectively.
Irena Kanapkienė - One of the best experts on this subject based on the ideXlab platform.
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the individual effects of cetane number oxygen content or fuel properties on performance efficiency exhaust smoke and emissions of a turbocharged crdi diesel Engine Part 2
Energy Conversion and Management, 2017Co-Authors: Gvidonas Labeckas, Stasys Slavinskas, Irena KanapkienėAbstract:Abstract The paper presents the individual effects made by the variation of cetane number, fuel-oxygen content, or widely differing properties of diesel-HRD fuel blends involving ethanol (E) or biodiesel (B) on the performance efficiency, brake specific fuel consumption, exhaust smoke and NO x , CO, HC emissions of a turbocharged CRDI diesel Engine. The dominant factors one after another operated separately to reveal their contribution to changes in operational parameters. Load characteristics were taken with a straight diesel and various (18 in total) fuel blends at maximum torque mode of 2000 rpm and additional speeds of 1500 and 2500 rpm to improve interpretation of the test results. The (bmep) characteristics were plotted as a function of relative air-fuel ratio (λ) to analyse performance and Engine out emissions for relative ‘lambda’ values of = 1.30, 1.25 and 1.20, at the respective speeds of 1500, 2000 and 2500 rpm. Parameters obtained when using fuel blends of both E and B origins were compared with those measured with ‘base-line’ blends possessing normal CN rating or zero content of oxygen and a straight diesel to reveal the resulting development trends. The combustion characteristics (Part 1) were used to properly interpret the resulting changes in Engine performance and emissions. The brake thermal efficiency equally increased by 0.5%, NO x emissions by 15.8% or 2.7%, smoke and CO decreased 1.7 times or by 34.9% and 7.2 times or increased by 18.8% when running with the most flammable (CN = 67.3) fuel blends E or B at λ = 1.20 and the high speed of 2500 rpm. The Engine efficiency increased by 2.9% or 0.5%, NO x emissions by 10.6% (1.81 wt%) or 5.0%, smoke and CO emissions decreased 3.0 times or by 46.7% and by 63.3% (3.61 wt%) or 49.5% when using the most oxygenated (4.52 wt%) fuel blends series E or B under given test conditions.
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the individual effects of cetane number oxygen content or fuel properties on the ignition delay combustion characteristics and cyclic variation of a turbocharged crdi diesel Engine Part 1
Energy Conversion and Management, 2017Co-Authors: Gvidonas Labeckas, Stasys Slavinskas, Irena KanapkienėAbstract:Abstract The study deals with the effects made by individual variation of cetane number, fuel-oxygen content, or widely differing properties of diesel-HRD fuel blends involving ethanol (E) or biodiesel (B) on the ignition delay, combustion phenomenon, maximum heat release rate, and the cyclic variation of a turbocharged CRDI diesel Engine. The most important control factors one after another operated separately in this study to make a difference. Load characteristics were taken when running with a straight diesel and various (18) diesel-HRD fuel blends at maximum torque mode of 2000 rpm and speeds of 1500 and 2500 rpm to provide correct interpretation of the test results. Then, load (bmep) characteristics were plotted as a function of the relative air-fuel ratio (λ) and the analysis of combustion parameters was conducted for the ‘lambda’ values of λ = 1.30, 1.25 and 1.20, at the respective speeds of 1500, 2000 and 2500 rpm. Analysis of changes in the ignition delay, combustion characteristics, and the cyclic variation of parameters when using fuel blends of both origins was performed on comparative bases with the corresponding values measured with ‘base-line’ blends with CN = 51.2 or zero oxygen content and a straight diesel to reveal the potential developing trends. The enhanced cetane number of oxygenated fuels improved combustion and reduced cyclic variation when running at the high speed of 2500 rpm mainly. Whereas fuel-oxygen content should be neither too high nor too low, but just enough to assure complete combustion and low cyclic variation. The differing properties of the fuel involving ethanol or biodiesel were a separate factor strongly affecting diffusive combustion and the coefficient of cyclic variation (COV). Developing trends in the combustion characteristics were used to interpret the resulting changes in Engine performance, emissions, and smoke (Part 2).
Jerzy Kowalski - One of the best experts on this subject based on the ideXlab platform.
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NOx emission from a two-stroke ship Engine: Part 2 – Laboratory test
Applied Thermal Engineering, 2009Co-Authors: Jerzy Kowalski, Wieslaw TarelkoAbstract:International audienc
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NOx emission from a two-stroke ship Engine. Part 1: Modeling aspect
Applied Thermal Engineering, 2009Co-Authors: Jerzy Kowalski, Wieslaw TarelkoAbstract:International audienc
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NOx emission from a two-stroke ship Engine: Part 2 – Laboratory test
Applied Thermal Engineering, 2008Co-Authors: Jerzy Kowalski, Wieslaw TarelkoAbstract:Abstract International regulations force ship owners to monitor the NOx emission from Engines during sea operational use of ships, but standard equipped Engine rooms has not installed any measurement equipment to analyze of exhaust gases. According to these regulations, we proposed a simple method to estimation of NOx emission without direct measurement, based on the measurements of working Engine parameters. In this paper, we present the effect of laboratory test to verification adequacy of the developed model. In this aim, we carried out tests on the two-stroke, one-cylinder, and loop scavenged diesel Engine. During tests the Engine operated with the various rotational speed, load, and changing air/fuel equivalence ratio. The comparison of the results of calculations with conducted tests showed the estimation errors in intervals 1.8% to 11% in dependence from the substitute molar compositions of fuels.
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NOx emission from a two-stroke ship Engine. Part 1: Modeling aspect
Applied Thermal Engineering, 2008Co-Authors: Jerzy Kowalski, Wieslaw TarelkoAbstract:Abstract International Maritime Organization regulations forces ship owners to measure NOx emission from ship Engines, but standard equipped Engine rooms has not installed any usable apparatus to analyze of exhaust gases. In this paper, we propose a method of NOx emission estimation based on the measurements of working parameters of two-stroke ship Engine. This estimation consists of both the model enabling to determine a temperature and model of composition of a gas mixture in the combustion chamber of the Engine. Application of such model does not require carrying out direct measurements of Engine exhaust gases by exhaust gas analyzers. For the developed method, results of Engine working parameters should be sufficient to estimate the NOx emission according to IMO regulations.