With the knowledge and findings obtained from the preceding investigations, there are several possible research directions which are worthy of further exploration in the future. At first, the temperature and current density distributions on the x-z plane and y-z plane are required to be quested for discussing the details of the effects of non-uniform inlet flow in the stacking direction on the stack performance.
Moreover, it is necessary to extend the analysis with various utilizations of anode gas and cathode gas in order to investigate the area of non-reaction on the cell plane in a unit of MCFC and a stack of MCFC. According to the results of non-reaction area,
this study can optimize the non-uniform profile of inlet flow in anode gas and cathode gas. Furthermore, the extension of the steady analysis to the transient analysis of a unit of MCFC for providing some information in a real time control system is another crucial topics of research.
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Appendix A
Xh2f0=0.203 Xco2f0=0.064 Xh2of0=0.150 Xn2f0=0.583 Xo2ox0=0.167
Xh2of=Gh2of/(Gh2f+Gco2f+Gh2of+Gcof+Gn2f) Xcof=Gcof/(Gh2f+Gco2f+Gh2of+Gcof+Gn2f )
Xn2f=Gn2f/(Gh2f+Gco2f+Gh2of+Gcof+Gn2f) Xo2ox=Go2ox/(Go2ox+Gco2ox+Gn2ox) Xco2ox=Gco2ox/(Go2ox+Gco2ox+Gn2ox)
Cpco2=25.977+4.36E-2*Te+(-1.494E-5)*Te^2 Cpn2 =27.313+5.190E-3*Te+(-7.212E-10)*Te^2
Cph2 =28.949+(-5.855E-4)*Te+(1.890E-6)*Te^2 Cph2o=30.407+9.54E-3*Te+(1.183E-6)*Te^2 Cpo2 =25.749+1.294E-2*Te+(-3.853E-6)*Te^2 Cpco2f=25.977+4.36E-2*Tga+(-1.494E-5)*Tga^2 Cpn2f =27.313+5.190E-3*Tga+(-7.212E-10)*Tga^2 Cph2f =28.949+(-5.855E-4)*Tga+(1.890E-6)*Tga^2 Cph2of=30.407+9.54E-3*Tga+(1.183E-6)*Tga^2 Cpo2f =25.749+1.294E-2*Tga+(-3.853E-6)*Tga^2 Cpco2ox=25.977+4.36E-2*Tgc+(-1.494E-5)*Tgc^2 Cpn2ox =27.313+5.190E-3*Tgc+(-7.212E-10)*Tgc^2 Cph2ox =28.949+(-5.855E-4)*Tgc+(1.890E-6)*Tgc^2 Cph2oox=30.407+9.54E-3*Tgc+(1.183E-6)*Tgc^2 Cpo2ox =25.749+1.294E-2*Tgc+(-3.853E-6)*Tgc^2
E=E0+R*Te/(2*F)*ln(Xo2ox^0.5*Xco2ox*Xh2f/Xh2of/Xco2f*P^0.5)
AAeg*Kega*(Te-Tga)+AAsg*Ksga*(Ts-Tga)+i/(2*F)*Cpco3*Te+Qs Tgc:(Gco2ox*Cpco2ox+Go2ox*Cpo2ox+Gn2ox*Cpn2ox)*dy(Tgc)=
AAeg*Kegc*(Te-Tgc)+AAsg*Ksgc*(Ts-Tgc)-i/(2*F)*Cpco3ox*Tgc Ts:
Gh2f: dx(Gh2f)=eps*del2(Gh2f)-i/(2*F)+delta*(Gh2f+Gco2f+Gh2of+Gcof) Gh2of: dx(Gh2of)=eps*del2(Gh2of)+i/(2*F)-delta*(Gh2f+Gco2f+Gh2of+Gcof) Gco2f: dx(Gco2f)=eps*del2(Gco2f)+i/(2*F)+delta*(Gh2f+Gco2f+Gh2of+Gcof) Gcof: dx(Gcof)=eps*del2(Gcof)-delta*(Gh2f+Gco2f+Gh2of+Gcof)
Gco2ox: dy(Gco2ox)=eps*del2(Gco2ox)+i/(2*F) Go2ox: dy(Go2ox)=eps*del2(Go2ox)-i/(4*F) BOUNDARIES
REGION 1 START(0,0)
nobc(Tga) value(Tgc)=867 value(Gco2ox)=Gox0*Xco2ox0 value(Go2ox)=Gox0*Xo2ox0
natural(Te)=0 natural(Ts)=0 line to (Lx,0)
nobc(Tga) nobc(Tgc) nobc(Gco2ox) nobc(Go2ox) natural(Te)=0 natural(Ts)=0
line to (Lx,Ly)
nobc(Tga) nobc(Tgc) nobc(Gco2ox) nobc(Go2ox) natural(Te)=0 natural(Ts)=0
line to (0,Ly)
value(Tga)=858 value(Gh2f)=Gf0*Xh2f0 value(Gh2of)=Gf0*Xh2of0 value(Gco2f)=Gf0*Xco2f0 nobc(Tgc) natural(Te)=0 natural(Ts)=0
MONITORS
contour(Tga-273) contour(Tgc-273) contour(Te-273) contour(Ts-273) contour(i) contour(Gh2f)
contour(Gh2of) contour(Gco2f) contour(Go2ox) contour(Gco2ox) contour(E) contour(Reff)
elevation(Tga-273) from (0,Ly/2) to (Lx,Ly/2) elevation(Tgc-273) from (Lx/2,0) to (Lx/2,Ly)
summary
report((integral(E,1))/Lx/Ly) report((integral(Reff,1))/Lx/Ly) report(Voltage) report((integral(i,1))/Lx/Ly) report((integral(Tga,1))/Lx/Ly-273)
report((integral(Tgc-273,1))/Lx/Ly) PLOTS
contour(Tga-273) contour(Tgc-273) contour(Te-273) contour(Ts-273) contour(i) contour(Gh2f)
contour(Gh2of) contour(Gco2f) contour(Go2ox) contour(Gco2ox) contour(E) contour(Reff)
elevation(Tga-273) from (0,Ly/2) to (Lx,Ly/2) elevation(Tgc-273) from (Lx/2,0) to (Lx/2,Ly)
summary
report((integral(E,1))/Lx/Ly) report((integral(Reff,1))/Lx/Ly) report(Voltage) report((integral(i,1))/Lx/Ly) report((integral(Tga,1))/Lx/Ly-273)
report((integral(Tgc-273,1))/Lx/Ly) HISTORIES
END