The Effect of the Pressure and the Density on the Air Fuel Ratio for Thermal Power Plant
DOI:
https://doi.org/10.31695/IJASRE.2020.33864Keywords:
Air Fuel Ratio , Pressure, Temperature, Density, CombustionAbstract
The control of the air-fuel ratio (AFR) is critical for the efficiency of the combustion. This is for achieving the better performance of the plant and result in high output energy. Different parameters influence AFR. This paper models the AFR as a function of the inlet temperature, density, and pressure. Formulated models have been checked using recorded data from the site. The results show that the AFR increases by 1.5 units as the pressures of the gas increase by 0.6 bars but when it reaches 2.9 bar, AFR starts to decrease, 0.9% of the increase of the density leads to the decrease of the AFR of 0.4 in average. 3.5oC rise of inlet temperature lift the AFR by 0.2; however, it starts to decrease when the temperature reaches 78oC.
References
R. Pradhan, P. Ramkumar, and M. Sreenivasan, “Air-Fuel Ratio ( Afr ) Calculations In An Internal Combustion Engine Based On The Cylinder Pressure Measurements,” Int. J. Eng. Res. Apllication, vol. 2, no. 6, pp. 1378–1385, 2012.
B. Abbas Al-Himyari, A. Yasin, and H. Gitano, “Review of Air-Fuel Ratio Prediction and Control Methods,” Asian J. Appl. Sci., vol. 2, no. 4, pp. 471–478, 2014.
A. Marjanovi, “Control of Thermal Power Plant Combustion Distribution Using Extremum Seeking,” vol. 25, no. 5, pp. 1670–1682, 2017.
S. Mcallister, Thermodynamics of Combustion, no. April. 2014.
A. H. Al-abbas and J. Naser, “CFD Modelling of Air-Fired and Oxy-Fuel Combustion in a 100 kW Unit Firing Propane ICME11-TH-004 CFD MODELLING OF AIR-FIRED AND OXY-FUEL COMBUSTION IN A 100 KW UNIT FIRING PROPANE,” no. August 2017, 2011.
G. A. Richards, “A Model for Premixed Combustion Oscillations Technical Note,” vol. 1026, no. 304, pp. 1–28, 1996.
E. H. R. Janus, M.C, G.A. Richards, M.J. Yip, “Effects of Ambient Conditions and Fuel Composition on Combustion Stability,” 1997 Am. Soc. Mech. Eng. (ASME)/International Gas Turbine Inst. Turbo Expo Meet., 1997.
H. F. Alajmi, “Effect of Ambient Air Temperature on the Performance of Steam Generator,” vol. 8, no. 7, pp. 479–483, 2017.
L. Chao, L. Ke, W. Yongzhen, M. Zhitong, and G. Yulie, “The Effect Analysis of Thermal Efficiency and Optimal Design for Boiler System,” Energy Procedia, vol. 105, pp. 3045–3050, 2017.
C. Principles, “A Boiler Combustion Control System with Combustion Ratio Optimisation and Soft Measurements,” vol. 43, no. May, pp. 112–115, 2010.
M. N. Bera, A. Riera, and M. Lewenstein, “Universal Laws of Thermodynamics,” no. December, 2016.
Introduction to Modeling and Control of Internal Combustion Engine Systems, Springer, 1395.
F. P. Ion V. Ion, “Dynamic model of a steam boiler furnace,” no. February, 2019.
A. O. S. R. G. Freire, J. M. Lemos, “MODELLING THE AIR/FLUE-GAS CIRCUIT OF A THERMOELECTRIC POWER PLANT UNIT.”
Downloads
How to Cite
Issue
Section
License
Copyright (c) 2020 Prosper NDIZIHIWE, Dr. Burnet Mkandawire, Dr. Venant Kayibanda
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
