The Experts below are selected from a list of 88335 Experts worldwide ranked by ideXlab platform
K. A. Subramanian - One of the best experts on this subject based on the ideXlab platform.
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a comprehensive review on utilization of hydrogen in a compression ignition engine under dual fuel Mode
Renewable & Sustainable Energy Reviews, 2017Co-Authors: Venkateswarlu Chintala, K. A. SubramanianAbstract:Compression ignition (CI) engines emit high levels of particulate matter (PM) and oxide of nitrogen (NOx) emissions due to combustion with heterogeneous air fuel mixture. The PM emission could be reduced significantly along with thermal efficiency improvement using hydrogen in the engines under dual fuel Mode (diesel-hydrogen). In hydrogen dual fuel engines, other emissions including hydrocarbon (HC), carbon monoxide (CO) and smoke decrease to near zero level whereas greenhouse gas emissions (carbon dioxide (CO2) and methane (CH4)) from CI engines decrease substantially. However, the literature review indicates the maximum hydrogen energy share in the dual fuel engines at rated load is limited from 6% to 25%. This is mainly due to higher in-cylinder peak pressure and rate of pressure rise, knocking and autoignition of hydrogen-air charge. In addition to this, NOx emission in the engine under dual fuel Mode is higher (about 29–58%) than conventional diesel Mode due to high localized in-cylinder temperature. The suitable strategies for improvement of maximum hydrogen energy share (up to 79%) and NOx emission reduction (up to a level of conventional Mode) in CI engines under dual fuel Mode are discussed in detail.
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Experimental investigation of autoignition of hydrogen-air charge in a compression ignition engine under Dual-Fuel Mode
Energy, 2017Co-Authors: Venkateswarlu Chintala, K. A. SubramanianAbstract:Abstract High amount of hydrogen substitution in a compression ignition (CI) engine under dual fuel Mode is limited due to more probability of autoignition of hydrogen-air charge and knocking problem. The study deals with analysis of autoignition of hydrogen-air charge in a 7.4 kW rated power output of CI engine under dual fuel Mode (diesel-hydrogen) at 100% load (Case I) and 50% load (Case II). Experimental results indicate that the significant increase in in-cylinder temperature is the predominant factor for autoignition of hydrogen-air charge. The in-cylinder temperature increased due to combustion advancement with hydrogen addition into the engine. Computational fluid dynamics (CFD) simulation study also confirms the combustion advancement with hydrogen addition in the engine. Experimental tests were extended further with water injection into the engine under dual fuel Mode (Case III). A clear conclusion emerged from the study is that the hydrogen-air charge gets autoignite without any external ignition aid when the reactants temperature is about 953 K ± 8 K. It could also be observed that knock limited hydrogen energy share in the engine at 100% load was increased from 18.8% with conventional dual fuel Mode to 60.7% with water injection due to decrease in in-cylinder temperature.
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CFD analysis on effect of localized in-cylinder temperature on nitric oxide (NO) emission in a compression ignition engine under hydrogen-diesel Dual-Fuel Mode
Energy, 2016Co-Authors: Venkateswarlu Chintala, K. A. SubramanianAbstract:Utilization of hydrogen in a compression ignition (CI) engine (7.4 kW rated power) under Dual-Fuel Mode could reduce all carbon based emissions however it emits high NOx (oxides of nitrogen) emission due to high localized in-cylinder temperature during combustion. The present study is aimed at analysis of effect of localized (burned zone) in-cylinder temperature on formation of NO emission using theoretical (two zone Model) and Computational Fluid Dynamics (CFD) simulations. Localized in-cylinder peak temperature (in burned zone) increased from 2278.2 K with base diesel Mode to 2402.7 K with Dual-Fuel Mode (16.7% hydrogen energy share). Nitric oxide (NO) emission formed mainly during premixed combustion phase about 363° to 376° crank angle. The NO emission at 16.7% hydrogen energy share with experimental test, two zone Model, and CFD simulation are 914 ppm, 1208 ppm, and 1382 ppm. The simulation results are inline with the experimental results with the error band of 15%–23%. It is well established through this study that formation of NO emission at source level is strong function of localized in-cylinder temperature and its distribution pattern in the combustion chamber.
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Experimental investigation of hydrogen energy share improvement in a compression ignition engine using water injection and compression ratio reduction
Energy Conversion and Management, 2016Co-Authors: Venkateswarlu Chintala, K. A. SubramanianAbstract:This study deals with the effect of water addition on enhancement of maximum hydrogen energy share in a compression ignition engine (7.4 kW rated power at 1500 rpm) under dual fuel Mode. The specific water consumption (SWC) was varied from 130 to 480 g/kW h in step of 70 g/kW h using manifold and port injection methods. Subsequently, the combined effect of reduction of compression ratio (CR) of the engine (from 19.5:1 (base) to 16.5:1 and 15.4:1) along with water addition on further enhancement of hydrogen energy share is investigated. The hydrogen energy share was limited to 18.8% with conventional dual fuel Mode due to knocking. However, the energy share increased to 66.5% with water addition (maximum SWC: 480 g/kW h), and 79% with combined control strategies (SWC of 340 g/kW h and CR reduction to 16.5:1). Thermal efficiency of the engine under water added dual fuel Mode is higher than base diesel Mode (single fuel Mode), but it is lower than the conventional dual fuel Mode without water. The efficiency of the engine with reduced CR and water addition is lower than the conventional dual fuel Mode, however at the CR of 16.5:1 and SWC of 340 g/kW h, the efficiency is comparable with base diesel Mode efficiency. Hydrocarbon, carbon monoxide, smoke, and oxides of nitrogen emissions of the engine with water addition (340 g/kW h) and CR reduction (to 16.5:1) decreased significantly as compared to base diesel Mode, but slightly higher than conventional dual fuel Mode.
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Experimental investigations of effects of EGR on performance and emissions characteristics of CNG fueled reactivity controlled compression ignition (RCCI) engine
Energy Conversion and Management, 2016Co-Authors: Sunmeet Singh Kalsi, K. A. SubramanianAbstract:Abstract Experimental tests were carried out on a single cylinder diesel engine (7.4 kW rated power at 1500 rpm) under dual fuel Mode (CNG-Diesel) with EGR (exhaust gas recirculation). Less reacting fuel (CNG) was injected inside the intake manifold using timed manifold gas injection system whereas high reactive diesel fuel was directly injected into the engine’s cylinder for initiation of ignition. EGR at different percentages (8%, 15% and 30%) was inducted to the engine through intake manifold and tests were conducted at alternator power output of 2 kW and 5 kW. The engine can operate under dual fuel Mode with maximum CNG energy share of 85% and 92% at 5 kW and 2 kW respectively. The brake thermal efficiency of diesel engine improved marginally at 5 kW power output under conventional dual fuel Mode with the CNG share up to 37% whereas the efficiency did not change with up to 15% EGR however it decreased beyond the EGR percentage. NO x emission in diesel engine under conventional dual fuel Mode decreased significantly and it further decreased drastically with EGR. The notable point emerged from this study is that CO and HC emissions, which are major problems at part load in reactivity controlled compression ignition engine (RCCI), decreased with 8% EGR along with further reduction of NO x . However, smoke emission is marginally higher with EGR than without EGR but it is still less than conventional Mode (Diesel alone). The new concept emerged from this study is that CO and HC emissions of RCCI engine at part load can be reduced using EGR.
Rahul Banerjee - One of the best experts on this subject based on the ideXlab platform.
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Development of an artificial neural network based virtual sensing platform for the simultaneous prediction of emission-performance-stability parameters of a diesel engine operating in dual fuel Mode with port injected methanol
Energy Conversion and Management, 2019Co-Authors: Dipankar Kakati, Sumit Roy, Rahul BanerjeeAbstract:Abstract The present work explores the potential of an artificial neural network platform to emulate the performance, emissions and stability indices of an existing single cylinder diesel engine operating in Dual-Fuel Mode with methanol port injection under varying fuel injection pressure. This investigation is further augmented by hydrous methanol injection strategies. Brake power, fuel injection pressure, diesel specific fuel consumption, methanol specific fuel consumption, air flow rate, exhaust oxygen and temperature have been chosen as the Model inputs while oxides of nitrogen, unburned hydrocarbon, carbon monoxide, carbon dioxide, soot have been chosen as the emission responses to be Modelled along with equivalent brake specific fuel consumption as the performance response and coefficient of variance of indicated mean effective pressure as the stability parameter to be estimated. Absolute, relative and percentage-based statistical error metrics have been employed for Model evaluation. The developed Model shows an excellent agreement with the experimental data as evident from its extremely low normalized mean square error, symmetric mean absolute percentage error, Normalized root mean square error, mean squared relative error footprint coupled with high coefficient of determination which was observed to be within a range of 0.983–0.9999 and a corresponding Nash Sutcliffe coefficient of efficiency of 85%–99.6%. Furthermore, low Theil uncertainty evaluation and Kullback-Leibler Divergence values imparted a commendable credence of robustness to the estimation capability of the developed Model. The present study manifests a computationally efficient and reliable virtual sensing platform to simultaneously emulate the emission-performance and stability parameters of a diesel-methanol partially premixed dual fuel operational paradigms in real time engine control strategies.
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Characterization of performance-emission indices of a diesel engine using ANFIS operating in Dual-Fuel Mode with LPG
Heat and Mass Transfer, 2018Co-Authors: Amitav Chakraborty, Sumit Roy, Rahul BanerjeeAbstract:This experimental work highlights the inherent capability of an adaptive-neuro fuzzy inference system (ANFIS) based Model to act as a robust system identification tool (SIT) in prognosticating the performance and emission parameters of an existing diesel engine running of diesel-LPG dual fuel Mode. The developed Model proved its adeptness by successfully harnessing the effects of the input parameters of load, injection duration and LPG energy share on output parameters of BSFC_EQ, BTE, NO_X, SOOT, CO and HC. Successive evaluation of the ANFIS Model, revealed high levels of resemblance with the already forecasted ANN results for the same input parameters and it was evident that similar to ANN, ANFIS also has the innate ability to act as a robust SIT. The ANFIS predicted data harmonized the experimental data with high overall accuracy. The correlation coefficient (R) values are stretched in between 0.99207 to 0.999988. The mean absolute percentage error (MAPE) tallies were recorded in the range of 0.02–0.173% with the root mean square errors (RMSE) in acceptable margins. Hence the developed Model is capable of emulating the actual engine parameters with commendable ranges of accuracy, which in turn would act as a robust prediction platform in the future domains of optimization.
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Characterization of performance-emission indices of a diesel engine using ANFIS operating in Dual-Fuel Mode with LPG
Heat and Mass Transfer, 2018Co-Authors: Amitav Chakraborty, Sumit Roy, Rahul BanerjeeAbstract:This experimental work highlights the inherent capability of an adaptive-neuro fuzzy inference system (ANFIS) based Model to act as a robust system identification tool (SIT) in prognosticating the performance and emission parameters of an existing diesel engine running of diesel-LPG dual fuel Mode. The developed Model proved its adeptness by successfully harnessing the effects of the input parameters of load, injection duration and LPG energy share on output parameters of BSFC_EQ, BTE, NO_X, SOOT, CO and HC. Successive evaluation of the ANFIS Model, revealed high levels of resemblance with the already forecasted ANN results for the same input parameters and it was evident that similar to ANN, ANFIS also has the innate ability to act as a robust SIT. The ANFIS predicted data harmonized the experimental data with high overall accuracy. The correlation coefficient (R) values are stretched in between 0.99207 to 0.999988. The mean absolute percentage error (MAPE) tallies were recorded in the range of 0.02–0.173% with the root mean square errors (RMSE) in acceptable margins. Hence the developed Model is capable of emulating the actual engine parameters with commendable ranges of accuracy, which in turn would act as a robust prediction platform in the future domains of optimization.
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application of artificial intelligence ai in characterization of the performance emission profile of a single cylinder ci engine operating with hydrogen in dual fuel Mode an ann approach with fuzzy logic based topology optimization
International Journal of Hydrogen Energy, 2016Co-Authors: Madhujit Deb, Sumit Roy, Pinki Majumder, Arindam Majumder, Rahul BanerjeeAbstract:Abstract The ever-increasing demand for fossil fuels and environmental issues have been the major concerns over the past few decades to search for viable alternative fuels where hydrogen find its suitability to be a viable and promising alternative fuel option on existing IC engine platforms in bridging the contemporary gap to the long term fuel cell based power train roadmap. It's clean burning capability helps to meet the stringent emission norms. Complete substitution of diesel with hydrogen may not be expedient for the time being but the potential use of hydrogen in a diesel engine in dual fuel Mode is possible. The study also investigates the use of Artificial Neural Network Modeling for prediction of performance and emission characteristics such as BSEC, BTE, NOx, Soot (FSN), UHC, CO2 of the existing single cylinder four-stroke diesel engine with hydrogen in dual fuel Mode. Levenberg–Marquardt back propagation training algorithm with logarithmic sigmoid and hyperbolic tangent sigmoid transfer function have resulted in the best Model for prediction of performance and emissions characteristics which has been well supported by the trade-off analysis between NOx–Soot (FSN)–BSEC. Fuzzy based analysis has been incorporated into existing ANN Model for optimal parameter design which suggests the Modesty of the employed transfer function of the existing ANN Model.
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Application of artificial intelligence (AI) in characterization of the performance–emission profile of a single cylinder CI engine operating with hydrogen in dual fuel Mode: An ANN approach with fuzzy-logic based topology optimization
International Journal of Hydrogen Energy, 2016Co-Authors: Madhujit Deb, Sumit Roy, Pinki Majumder, Arindam Majumder, Rahul BanerjeeAbstract:Abstract The ever-increasing demand for fossil fuels and environmental issues have been the major concerns over the past few decades to search for viable alternative fuels where hydrogen find its suitability to be a viable and promising alternative fuel option on existing IC engine platforms in bridging the contemporary gap to the long term fuel cell based power train roadmap. It's clean burning capability helps to meet the stringent emission norms. Complete substitution of diesel with hydrogen may not be expedient for the time being but the potential use of hydrogen in a diesel engine in dual fuel Mode is possible. The study also investigates the use of Artificial Neural Network Modeling for prediction of performance and emission characteristics such as BSEC, BTE, NOx, Soot (FSN), UHC, CO2 of the existing single cylinder four-stroke diesel engine with hydrogen in dual fuel Mode. Levenberg–Marquardt back propagation training algorithm with logarithmic sigmoid and hyperbolic tangent sigmoid transfer function have resulted in the best Model for prediction of performance and emissions characteristics which has been well supported by the trade-off analysis between NOx–Soot (FSN)–BSEC. Fuzzy based analysis has been incorporated into existing ANN Model for optimal parameter design which suggests the Modesty of the employed transfer function of the existing ANN Model.
Venkateswarlu Chintala - One of the best experts on this subject based on the ideXlab platform.
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a comprehensive review on utilization of hydrogen in a compression ignition engine under dual fuel Mode
Renewable & Sustainable Energy Reviews, 2017Co-Authors: Venkateswarlu Chintala, K. A. SubramanianAbstract:Compression ignition (CI) engines emit high levels of particulate matter (PM) and oxide of nitrogen (NOx) emissions due to combustion with heterogeneous air fuel mixture. The PM emission could be reduced significantly along with thermal efficiency improvement using hydrogen in the engines under dual fuel Mode (diesel-hydrogen). In hydrogen dual fuel engines, other emissions including hydrocarbon (HC), carbon monoxide (CO) and smoke decrease to near zero level whereas greenhouse gas emissions (carbon dioxide (CO2) and methane (CH4)) from CI engines decrease substantially. However, the literature review indicates the maximum hydrogen energy share in the dual fuel engines at rated load is limited from 6% to 25%. This is mainly due to higher in-cylinder peak pressure and rate of pressure rise, knocking and autoignition of hydrogen-air charge. In addition to this, NOx emission in the engine under dual fuel Mode is higher (about 29–58%) than conventional diesel Mode due to high localized in-cylinder temperature. The suitable strategies for improvement of maximum hydrogen energy share (up to 79%) and NOx emission reduction (up to a level of conventional Mode) in CI engines under dual fuel Mode are discussed in detail.
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Experimental investigation of autoignition of hydrogen-air charge in a compression ignition engine under Dual-Fuel Mode
Energy, 2017Co-Authors: Venkateswarlu Chintala, K. A. SubramanianAbstract:Abstract High amount of hydrogen substitution in a compression ignition (CI) engine under dual fuel Mode is limited due to more probability of autoignition of hydrogen-air charge and knocking problem. The study deals with analysis of autoignition of hydrogen-air charge in a 7.4 kW rated power output of CI engine under dual fuel Mode (diesel-hydrogen) at 100% load (Case I) and 50% load (Case II). Experimental results indicate that the significant increase in in-cylinder temperature is the predominant factor for autoignition of hydrogen-air charge. The in-cylinder temperature increased due to combustion advancement with hydrogen addition into the engine. Computational fluid dynamics (CFD) simulation study also confirms the combustion advancement with hydrogen addition in the engine. Experimental tests were extended further with water injection into the engine under dual fuel Mode (Case III). A clear conclusion emerged from the study is that the hydrogen-air charge gets autoignite without any external ignition aid when the reactants temperature is about 953 K ± 8 K. It could also be observed that knock limited hydrogen energy share in the engine at 100% load was increased from 18.8% with conventional dual fuel Mode to 60.7% with water injection due to decrease in in-cylinder temperature.
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CFD analysis on effect of localized in-cylinder temperature on nitric oxide (NO) emission in a compression ignition engine under hydrogen-diesel Dual-Fuel Mode
Energy, 2016Co-Authors: Venkateswarlu Chintala, K. A. SubramanianAbstract:Utilization of hydrogen in a compression ignition (CI) engine (7.4 kW rated power) under Dual-Fuel Mode could reduce all carbon based emissions however it emits high NOx (oxides of nitrogen) emission due to high localized in-cylinder temperature during combustion. The present study is aimed at analysis of effect of localized (burned zone) in-cylinder temperature on formation of NO emission using theoretical (two zone Model) and Computational Fluid Dynamics (CFD) simulations. Localized in-cylinder peak temperature (in burned zone) increased from 2278.2 K with base diesel Mode to 2402.7 K with Dual-Fuel Mode (16.7% hydrogen energy share). Nitric oxide (NO) emission formed mainly during premixed combustion phase about 363° to 376° crank angle. The NO emission at 16.7% hydrogen energy share with experimental test, two zone Model, and CFD simulation are 914 ppm, 1208 ppm, and 1382 ppm. The simulation results are inline with the experimental results with the error band of 15%–23%. It is well established through this study that formation of NO emission at source level is strong function of localized in-cylinder temperature and its distribution pattern in the combustion chamber.
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Experimental investigation of hydrogen energy share improvement in a compression ignition engine using water injection and compression ratio reduction
Energy Conversion and Management, 2016Co-Authors: Venkateswarlu Chintala, K. A. SubramanianAbstract:This study deals with the effect of water addition on enhancement of maximum hydrogen energy share in a compression ignition engine (7.4 kW rated power at 1500 rpm) under dual fuel Mode. The specific water consumption (SWC) was varied from 130 to 480 g/kW h in step of 70 g/kW h using manifold and port injection methods. Subsequently, the combined effect of reduction of compression ratio (CR) of the engine (from 19.5:1 (base) to 16.5:1 and 15.4:1) along with water addition on further enhancement of hydrogen energy share is investigated. The hydrogen energy share was limited to 18.8% with conventional dual fuel Mode due to knocking. However, the energy share increased to 66.5% with water addition (maximum SWC: 480 g/kW h), and 79% with combined control strategies (SWC of 340 g/kW h and CR reduction to 16.5:1). Thermal efficiency of the engine under water added dual fuel Mode is higher than base diesel Mode (single fuel Mode), but it is lower than the conventional dual fuel Mode without water. The efficiency of the engine with reduced CR and water addition is lower than the conventional dual fuel Mode, however at the CR of 16.5:1 and SWC of 340 g/kW h, the efficiency is comparable with base diesel Mode efficiency. Hydrocarbon, carbon monoxide, smoke, and oxides of nitrogen emissions of the engine with water addition (340 g/kW h) and CR reduction (to 16.5:1) decreased significantly as compared to base diesel Mode, but slightly higher than conventional dual fuel Mode.
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an effort to enhance hydrogen energy share in a compression ignition engine under dual fuel Mode using low temperature combustion strategies
Applied Energy, 2015Co-Authors: Venkateswarlu Chintala, K. A. SubramanianAbstract:Abstract A limited hydrogen (H2) energy share due to knocking is the major hurdle for effective utilization of H2 in compression ignition (CI) engines under Dual-Fuel operation. The present study aims at improvement of H2 energy share in a 7.4 kW direct injection CI engine under Dual-Fuel Mode with two low temperature combustion (LTC) strategies; (i) retarded pilot fuel injection timing and (ii) water injection. Experiments were carried out under conventional strategies of diesel Dual-Fuel Mode (DDM) and B20 Dual-Fuel Mode (BDM); and LTC strategies of retarded injection timing Dual-Fuel Mode (RDM) and water injected Dual-Fuel Mode (WDM). The results explored that the H2 energy share increased significantly from 18% with conventional DDM to 24, and 36% with RDM, and WDM respectively. The energy efficiency increased with increasing H2 energy share under Dual-Fuel operation; however, for a particular energy share of 18% H2, it decreased from 34.8% with DDM to 33.7% with BDM, 32.7% with WDM and 29.9% with RDM. At 18% H2 energy share, oxides of nitrogen emission decreased by 37% with RDM and 32% with WDM as compared to conventional DDM due to reduction of in-cylinder temperature, while it increased slightly about 5% with BDM. It is emerged from the study that water injection technique is the viable option among all other strategies to enhance the H2 energy share in the engine with a slight penalty of increase in smoke, hydrocarbon, and carbon monoxide emissions.
Himsar Ambarita - One of the best experts on this subject based on the ideXlab platform.
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Effect of engine load and biogas flow rate to the performance of a compression ignition engine run in Dual-Fuel (dieselbiogas) Mode
IOP Conference Series: Materials Science and Engineering, 2018Co-Authors: Himsar AmbaritaAbstract:The Government of Indonesia (GoI) has released a target on reduction Green Houses Gases emissions (GHG) by 26% from level business-as-usual by 2020, and the target can be up to 41% by international supports. In the energy sector, this target can be reached effectively by promoting fossil fuel replacement or blending with biofuel. One of the potential solutions is operating compression ignition (CI) engine in Dual-Fuel (diesel-biogas) Mode. In this study effects of engine load and biogas flow rate on the performance and exhaust gas emissions of a compression ignition engine run in Dual-Fuel Mode are investigated. In the present study, the used biogas is refined with methane content 70% of volume. The objectives are to explore the optimum operating condition of the CI engine run in Dual-Fuel Mode. The experiments are performed on a four-strokes CI engine with rated output power of 4.41 kW. The engine is tested at constant speed 1500 rpm. The engine load varied from 600W to 1500W and biogas flow rate varied from 0 L/min to 6 L/min. The results show brake thermal efficiency of the engine run in Dual-Fuel Mode is better than pure diesel Mode if the biogas flow rates are 2 L/min and 4 L/min. It is recommended to operate the present engine in a Dual-Fuel Mode with biogas flow rate of 4 L/min. The consumption of diesel fuel can be replaced up to 50%.
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performance and emission characteristics of a small diesel engine run in dual fuel diesel biogas Mode
Case Studies in Thermal Engineering, 2017Co-Authors: Himsar AmbaritaAbstract:Abstract A small compression ignition (CI) engine with a rated power of 4.41 kW has been tested in Dual-Fuel (diesel-biogas) Mode without any significant modification. The objectives are to explore the effects of biogas flow rate and methane concentration on the performance and emissions of the CI engine run in Dual-Fuel Mode. The experiments have been carried out at engine load and speed vary from 1000 rpm to 1500 rpm and 600 W to 1500 W, respectively. The results show that the output power and specific fuel consumption of the CI engine run in Dual-Fuel Mode are higher than the CI engine run in pure diesel Mode. Brake thermal efficiency of the CI engine run in Dual-Fuel Mode strongly affected by biogas flow rate and methane concentration. There exists an optimum biogas flow rate for a maximum brake thermal efficiency. The biogas can reduce the diesel fuel consumption significantly. In the present CI engine, diesel replacement ratio varies from 15.3% to 87.5%. At engine load and speed of 1500 W and 1500 rpm, to get maximum efficiency, the present CI engine should be operated at biogas energy ratios of 15% and 18% using biogas with 60% and 70% methane concentrations, respectively.
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A Numerical Study on Combustion Process in a Small Compression Ignition Engine Run Dual-Fuel Mode (Diesel-Biogas)
Journal of Physics: Conference Series, 2017Co-Authors: Himsar Ambarita, T. I Widodo, D M NasutionAbstract:In order to reduce the consumption of fossil fuel of a compression ignition (CI) engines which is usually used in transportation and heavy machineries, it can be operated in Dual-Fuel Mode (diesel-biogas). However, the literature reviews show that the thermal efficiency is lower due to incomplete combustion process. In order to increase the efficiency, the combustion process in the combustion chamber need to be explored. Here, a commercial CFD code is used to explore the combustion process of a small CI engine run on dual fuel Mode (diesel-biogas). The turbulent governing equations are solved based on finite volume method. A simulation of compression and expansions strokes at an engine speed and load of 1000 rpm and 2500W, respectively has been carried out. The pressure and temperature distributions and streamlines are plotted. The simulation results show that at engine power of 732.27 Watt the thermal efficiency is 9.05%. The experiment and simulation results show a good agreement. The method developed in this study can be used to investigate the combustion process of CI engine run on Dual-Fuel Mode.
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Performance and Emissions of a Small Compression Ignition Engine Run on Dual-Fuel Mode (Diesel-Raw biogas)
IOP Conference Series: Materials Science and Engineering, 2017Co-Authors: Himsar Ambarita, Emerson P. Sinulingga, M Km Nasution, Hideki KawaiAbstract:In this work, a compression ignition (CI) engine is tested in Dual-Fuel Mode (Diesel-Raw biogas). The objective is to examine the performance and emission characteristics of the engine when some of the diesel oil is replaced by biogas. The specifications of the CI engine are air cooled single horizontal cylinder, four strokes, and maximum output power of 4.86 kW. It is coupled with a synchronous three phase generator. The load, engine revolution, and biogas flow rate are varied from 600 W to 1500 W, 1000 rpm to 1500 rpm, 0 to 6 L/minute, respectively. The electric power, specific fuel consumption, thermal efficiency, gas emission, and diesel replacement ratio are analyzed. The results show that there is no significant difference of the power resulted by CI run on Dual-Fuel Mode in comparison with pure diesel Mode. However, the specific fuel consumption and efficiency decrease significantly as biogas flow rate increases. On the other hand, emission of the engine on Dual-Fuel Mode is better. The main conclusion can be drawn is that CI engine without significant modification can be operated perfectly in Dual-Fuel Mode and diesel oil consumption can be decreased up to 87.5%.
Narayan Lal Jain - One of the best experts on this subject based on the ideXlab platform.
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Effect of injection pressure on performance, emission, and combustion characteristics of diesel–acetylene-fuelled single cylinder stationary CI engine
Environmental Science and Pollution Research, 2018Co-Authors: Anmesh Kumar Srivastava, Shyam Lal Soni, Dilip Sharma, Narayan Lal JainAbstract:In this paper, the effect of injection pressure on the performance, emission, and combustion characteristics of a diesel-acetylene fuelled single cylinder, four-stroke, direct injection (DI) diesel engine with a rated power of 3.5 kW at a rated speed of 1500 rpm was studied. Experiments were performed in Dual-Fuel Mode at four different injection pressures of 180, 190, 200, and 210 bar with a flow rate of 120 LPH of acetylene and results were compared with that of baseline diesel operation. Experimental results showed that highest brake thermal efficiency of 27.57% was achieved at injection pressure of 200 bar for diesel-acetylene Dual-Fuel Mode which was much higher than 23.32% obtained for baseline diesel. Carbon monoxide, hydrocarbon, and smoke emissions were also measured and found to be lower, while the NO_ x emissions were higher at 200 bar in dual fuel Mode as compared to those in other injection pressures in dual fuel Mode and also for baseline diesel Mode. Peak cylinder pressure, net heat release rate, and rate of pressure rise were also calculated and were higher at 200 bar injection pressure in dual fuel Mode.
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Effect of injection pressure on performance, emission, and combustion characteristics of diesel-acetylene-fuelled single cylinder stationary CI engine.
Environmental science and pollution research international, 2017Co-Authors: Anmesh Kumar Srivastava, Shyam Lal Soni, Dilip Sharma, Narayan Lal JainAbstract:In this paper, the effect of injection pressure on the performance, emission, and combustion characteristics of a diesel-acetylene fuelled single cylinder, four-stroke, direct injection (DI) diesel engine with a rated power of 3.5 kW at a rated speed of 1500 rpm was studied. Experiments were performed in Dual-Fuel Mode at four different injection pressures of 180, 190, 200, and 210 bar with a flow rate of 120 LPH of acetylene and results were compared with that of baseline diesel operation. Experimental results showed that highest brake thermal efficiency of 27.57% was achieved at injection pressure of 200 bar for diesel-acetylene Dual-Fuel Mode which was much higher than 23.32% obtained for baseline diesel. Carbon monoxide, hydrocarbon, and smoke emissions were also measured and found to be lower, while the NO x emissions were higher at 200 bar in dual fuel Mode as compared to those in other injection pressures in dual fuel Mode and also for baseline diesel Mode. Peak cylinder pressure, net heat release rate, and rate of pressure rise were also calculated and were higher at 200 bar injection pressure in dual fuel Mode.
