Investigation of Syngas Combustion at Variable Methane Composition in Can Combustor Using CFD

2014 ◽  
Vol 1016 ◽  
pp. 592-596
Author(s):  
Norhaslina Mat Zian ◽  
Hasril Hasini ◽  
Nur Irmawati Om
Keyword(s):  
Heat Flux ◽  
Carbon Monoxide ◽  
Temperature Distribution ◽  
Computational Fluid Dynamic ◽  
Fluid Dynamic ◽  
Flame Temperature ◽  
Gas Combustion ◽  
Synthetic Gas ◽  
Syngas Combustion ◽  
Natural Gas Combustion

This paper describes the analysis of the fundamental effect of synthetic gas combustion in a can-type combustor using Computational Fluid Dynamic(CFD). Emphasis is given towards the effect of variation of methane to the flame profile, temperature distribution and heat flux in the combustor. In this study, the composition of hydrogen in the syngas was fixed at 30% while methane and carbon monoxide were varied. Results show that the flame temperature and NOxemissions are highly dependent on the composition of methane in the syngas fuel. Nevertheless, the overall NOxemission for all cases is relatively lower than the conventional pure natural gas combustion.

CFD Analysis of Temperature Distribution in Can-Type Combustor Firing Synthetic Gas

2013 ◽  
Vol 393 ◽  
pp. 741-746 ◽  
Author(s):  
Hasril Hasini ◽  
Norshah Hafeez Shuaib ◽  
Wan Ahmad Fahmi Wan Abdullah
Keyword(s):  
Temperature Distribution ◽  
Natural Gas ◽  
Flue Gas ◽  
Flame Temperature ◽  
Base Case ◽  
Cfd Analysis ◽  
Gas Temperature ◽  
Gas Combustion ◽  
Synthetic Gas ◽  
Natural Gas Combustion

This paper presents CFD analysis of the effect of syngas combustion in a full scale gas turbine combustor with specific emphasis given to the flame and flue gas temperature distribution. A base case solution was first established using conventional natural gas combustion. Actual operating boundary conditions such as swirl, diffusion and fuel mass flow were imposed on the model. The simulation result is validated with the flame temperature of typical natural gas combustion. Result from flow and combustion calculation shows reasonable trend of the swirl mixing effect. The maximum flame temperature was found to be the highest for syngas with the highest H2/CO ratio. However, the flue gas temperature was found to be approximately identical for all cases. The prediction of temperature distribution in the combustor would enable further estimation of pollutant species such as CO2and NOxin complex regions within the combustor.

Temperature Distribution Analysis on Syngas Combustion in Microgas Turbine

2016 ◽  
Vol 819 ◽  
pp. 282-286
Author(s):  
Siti Sarah Ain Fadhil ◽  
Hasril Hasini ◽  
Mohd Nasharuddin Mohd Jaafar ◽  
Nor Fadzilah Othman
Keyword(s):  
Temperature Distribution ◽  
Natural Gas ◽  
Gas Turbines ◽  
Flame Temperature ◽  
Combustion Model ◽  
Base Case ◽  
Distribution Analysis ◽  
Gas Temperature ◽  
Gas Combustion ◽  
Synthetic Gas

Gas turbines are capable to utlize variety of fuel including natural gas, fuel oils and synthetic gas. It has environmental advantages and thus gas turbines are favourable in the power generating industries. The use of synthetic gas or syngas may reduce the CO2 and NOx emissions. The efficiency of syngas is comparable with natural gas. With the current constrain on the environmental issues, the use of syngas in gas turbines has been increasing. Despite its many advantages, the study on the combustion characteristics still remains a challenge, due to its variety fuel components. This paper aims to discuss the CFD analysis on the flame and flue gas temperature distribution in a full scale microgas turbine operating on syngas. Three cases were simulated with variety of natural gas concentration. A base case firing natural gas (100% methane) was first established using actual operation. Validation on the combustion model is made by comparing the flame temperature distribution of methane with reasonable accuracy. Simulation results with syngas show similar flame temperature distribution as natural gas combustion. The average temperature is much dependent on the composition of methane in syngas. The highest temperature given by syngas is made from the highest methane composiotion.

Preliminary CFD Investigation of Syngas Combustion at Different Operating Pressures

2015 ◽  
Vol 786 ◽  
pp. 215-219
Author(s):  
Norhaslina Mat Zian ◽  
Hasril Hasini ◽  
Nur Irmawati Om
Keyword(s):  
Temperature Distribution ◽  
Thermal Power ◽  
Combustion Process ◽  
Pressure Variation ◽  
Operating Pressure ◽  
Gas Turbine Combustor ◽  
Average Temperature ◽  
Conventional Combustion ◽  
Synthetic Gas ◽  
Syngas Combustion

Study on the flow and combustion behavior inside gas turbine combustor used in thermal power plant is described in this paper. The combustion process takes place using synthetic gas and emphasis is given to the effect of pressure variation on flame profile, temperature distribution and emissions as compared to the conventional combustion using methane. The operating pressure of the can-type combustor varies in the range of 1-10 atm. while the syngas composition is assumed to have fixed values of 10% CH4, 55% CO, 30% H2 and 5% N2. Preliminary result shows that the flow inside the can-combustor is highly swirling which indicates good mixing of fuel and air prior to the entrance of the mixture to the main combustion zone. The temperature distribution at combustor mid plane show identical pattern for pressure range between 1-10 atm for both maximum and average temperature magnitude.

scholarly journals Simulasi Numerik Karakteristik Pembakaran Pada Tangentially Fired Boiler Dengan Variasi Sudut Yaw

2019 ◽  
Vol 3 (3) ◽  
pp. 44-56
Author(s):  
Rindra Hosanova
Keyword(s):  
Temperature Distribution ◽  
Computational Fluid Dynamic ◽  
Consumption Rate ◽  
Fluid Dynamic ◽  
Energy Sources ◽  
Temperature Deviation ◽  
Boiler Efficiency ◽  
Coal Reserves ◽  
Yaw Angle

Coal is one of the energy sources that widely used for electricity, the age of coal reserves only remain 56 years, so it is necessary to make a study to reduce the consumption rate of coal with make an improvement on boiler efficiency which use tangentially fired boiler because it has good combustion. There are a problem in this type of boiler such as unbalance temperature and temperature deviation in superheaters and reheaters of the boiler. This research is made to study the effect of yaw angle modification to temperature in boiler. Method that used in this research is Computational Fluid Dynamic (CFD). Coal yaw angle modification in this research are +5º, 0º, -5º, -10º, dan -15º. Coal yaw angle modification have an effect to temperature distribution, wider yaw angle then larger the temperature deviation. The best coal yaw angle configuration is at -5º because it has the least temperature deviation on the upper furnace which minimize the risk of overheat on superheaters and reheaters. Keywords: CFD, yaw angle, tangentially fired boiler

scholarly journals The Effect of Combustion of Natural Gas With 21–29% O2/CO2/N2Mixtures on Emission of Carbon Monoxide

2013 ◽  
Vol 39 (4) ◽  
pp. 93-103 ◽  
Author(s):  
Zofia Kalicka ◽  
Wojciech Jerzak ◽  
Elżbieta Kawecka Cebula
Keyword(s):  
Carbon Monoxide ◽  
Natural Gas ◽  
Oxygen Concentration ◽  
Exhaust Gas ◽  
Gas Combustion ◽  
Model Calculations ◽  
Flow Rates ◽  
Co Concentration ◽  
Oxygen Excess ◽  
Natural Gas Combustion

Abstract Natural gas combustion was carried out in air enriched with oxygen in the amount of 25 and 29% with addition of CO2 in place of part of nitrogen. The research was carried out at different flow rates of gas and oxygen excess ratios. The concentration of CO and NOx was analyzed. It has not been proved that the increased oxygen concentration influences significantly the CO concentration. However, the addition of CO2 caused a substantial variability of CO concentration in the exhaust gas, in contrast to the concentration of NOx which decreased monotonically. Model calculations, performed with use of FactSage, indicate an increase in the concentration of CO not only for the air enriched with oxygen, but after adding CO2 too, as well

Preliminary CFD Investigation of Syngas Combustion at Different Operating Pressure

2016 ◽  
Vol 819 ◽  
pp. 277-281
Author(s):  
Norhaslina Mat Zian ◽  
Hasril Hasini ◽  
Nur Irmawati Om
Keyword(s):  
Temperature Distribution ◽  
Thermal Power ◽  
Combustion Process ◽  
Pressure Variation ◽  
Operating Pressure ◽  
Gas Turbine Combustor ◽  
Average Temperature ◽  
Conventional Combustion ◽  
Synthetic Gas ◽  
Syngas Combustion

Study on the flow and combustion behavior inside gas turbine combustor used in thermal power plant is described in this paper. The combustion process takes place using synthetic gas and emphasis is given to the effect of pressure variation on flame profile, temperature distribution and emissions as compared to the conventional combustion using methane. The operating pressure of the can-type combustor varies in the range of 1-10 atm. while the syngas composition is assumed to have fixed values of 10% CH4, 55% CO, 30% H2 and 5% N2. Preliminary result shows that the flow inside the can-combustor is highly swirling which indicates good mixing of fuel and air prior to the entrance of the mixture to the main combustion zone. The temperature distribution at combustor mid plane show identical pattern for pressure range between 1-10 atm for both maximum and average temperature magnitude.

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