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A-96 Cpval:=(Cp[x]+zeta*(Cp[x+ I]-Cp[x]))* 1000; muval:=(mu[x]+zeta*(mu[x+ I ]-mu[x])/1 000000; kval:=(k[x]+zeta*(k[x+ I ]-k[x]))/1 000; Go:= mair/(p*Afr); Re:= ss*Go/muval; first:= 7.32*lIss; {ss, hydraulic diameter for the holes} second:= 0.146*Re/(I+0.012*exp(0.8*ln(Re*ss/l»); third:= 0.475*exp(0.476*ln(Re»/SQRT(p); fourth:= 0.0237*exp(0.72*ln(Re»*(I+SQRT(p»/SQRT(p); fifth:= (I-p)/p+2*lIss; Nu:= (first+second+third+fourth)lfifth; h:= Nu*kvallss; U:= hl2; Ntufl:= -2*U*beta*Afr*lI(mair*Cpval); plates:= (l+exp(Ntufl»)/(I-exp(Ntufl»; ax:= kax*Acr/(l*mair*Cpval); po:= 2*Go*p*Cpval*Hf*HfI(3*kCu*I); deltaA:= Ntueff*beta*Afr*1*(plates+ax+po); TotaIA:= TotalA+deltaA; deIL:= deltaAl(beta*Aft); n:= delLiI end; procedure friction(var TotalP:real; Go,Re,rhoval,n:real); var begin Cd2:= SQR(I.707-p)/2; if Re <= 160 then Cd2:= 16.34*exp(-0.55*ln(Re»*Cd2; TotP2:= n*SQR(Go)/rhoval*Cd2; TotaIP:= TotalP+TotP2 {Calculates pressure drop for the length} . {increment calculated in AREA, by the method} {of Shevyakova and Orlov.} {Drag coefficient based on Sh&Or} {Incremental pressure drop, Pa} {Executes area and friction procedures,} {iterating for user defined temperature} {increments. Calculates incremental values and} {total area, no. of plates and total pressure} {drop. Writes the results to a user defined file.} {Array for comparing results and placing in order} {Total surface area required, sq-m} {Total pressure drop, Pa} {Total length of HX assuming perfect stacking, m} {Total length, m} {Total volume, cu-m} {Goodness factor} {Bulk fluid temperature, K} {Flow stream mass velocity, average, kgls-sq-m} {Reynolds no.} {Density, kglcu-m} {Number o f plates required} {Spacer thickness, mm} {Thermal conductivity, axial direction, W/m-K} {Variable for number of iterations} {Variables to put an initial 1.5*1 value to ss} {Variables for array manipulation, to record} {only the lowest LOWEST values} begin Cd2 : real; TotP2 : real; end; procedure iterate; var dif TotalA TotalP totL TotalL V olume Goodf Tbulk Go Re rhoval n s kax z,m r,index,t,c,d minimum : array [l..lowest] of real; : real; : real; : real; : real; : real; : real; : real; : real; : real; : real; : real; : real; : real; : integer; : integer; : integer; : real;PDF Image | CO2 removal from air for alkaline fuel cells operating with liquid H2
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