Equivalence Ratio Sample Clauses
Equivalence Ratio. NOx [ppmdv @0% O2] The NOx predictions are presented through Figures 21 to 23. Different points of view regarding the units to measure NOx have been used. First of all, Figure 21 shows the trends in form of NOx concentration in ppmdv (dry basis and corrected to 0% O2), whereas Figures 22 and 23 represent the NOx trends in terms of emission index; the difference between them is the variable used to normalize the NOx production rate: the emission index from Figure 22 is measured in gNOx/kgFuel_burned while Figure 23 is given in mgNOx/kWh_fuel burned. The measured NOx at the outlet is plotted against the equivalence ratio for all the different fuel mixtures. The trends obtained have been compared with the ones obtained with the equilibrium calculation (see Appendix C) and have result to be in good agreement. The only experimental data found addresses the natural gas case, fired at slightly lean conditions [22]. This measured value is marked in Figure 21 with a green point.
Equivalence Ratio. Temperature [K] The variation of the exhaust temperature and the heat transferred to the bricks are presented through Figures 35 and 36, respectively. 106000 104000 102000 100000 100%CH4 96%CH4-4%CO2 98000 96000 60%CH4-40%CO2 55%CH4-45%CO2 45%CH4-55%CO2 94000 92000 0.4 0.5 0.6 0.7
1.1 Equivalence Ratio Heat [W] It becomes clear that the addition of CO2 to the fuel mixture affects the exhaust temperature and the heat transferred to the walls, both variables are reduced when increasing the CO2 in the fuel mixture. The added CO2 acts as a heat sink thus lowering the flame temperature, decreasing the exhaust temperature and reducing the heat transferred to the brick walls. Regarding the effect of working at lean conditions, for the fuel mixtures with high content of CO2 the temperature of the flue gases seems to maintain around the same value, being not representative of what is expected. However, the decrease of the heat transferred to the bricks at lean conditions indicates that part of the heat released through the reaction has been employed to heat up the larger amount of product gases instead of being transferred to the bricks.
Equivalence Ratio. H2O [mole fraction] The results obtained for the main products of the combustion reaction, H2O and CO2, are presented in Figures 54 and 55, in which the molar fraction of these species can be found plotted against the equivalence ratio, for all the type 3 mixtures. 0.40 0.35 0.30 0.25 100%CH4 75%CH4-25%C2H6 85%CH4-15%C2H6 75%CH4-25%C3H8 0.20 75%CH4-15%C2H6-10%C3H8 0.15 0.4 0.5 0.6 0.7
1.1 Equivalence Ratio CO2 [mole fraction]