Issue 15

N. 32 S T cell 0.4 dec mW the Th the 2], imp S T HY to inv An per obs     l F F Zuliani, Frattur ACK PERFO ig. 4 sho hydro gen fuel c ell voltage, cor 6 V mean ce reases as loa /cm 2 for th stack (14 % is behaviour end plates c cell voltages roving perfo ACK PERFO DROGEN AN ig. 5 sho hydro gen of fue ls a some extend estigated. Fu important as formance of ervation can stack voltag stack voltag Fig. 8; the ends cel at 400 mA/ Figure 5 : Mean oad. Stack mea reformat 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 0 [V] a ed Integrità St RMANCE OP ws the stac at 160°C. I [8] at the sam responding t ll voltage. A d increases: f e stack (27% less). could be exp auses a mark are lower rmance. RMANCE AN D REFORM ws the mea and the sim re 5% at 200 lower than rthermore, du pect regardin the entire s be made: e distribution e distribution ls exhibit the cm 2 , the cell cell voltage a n temperature e (H 2 56.35%, 200 [m H2 - mean cell volt Sim. reformate - m H2 - power density Sim reformate - po rutturale, 15 (20 ERATING W k polarizatio n the same fi e operating o a power de s expected st or example o less). At 0.5 lained referri ed stack temp at stack end D VOLTAGE ATE FUELS n cell voltag ulated reform mA/cm 2 an that with h e to the CO g the stack o tack. Fig. 6 s patterns are follows a p lowest volta number 1 rea nd power den 160°C. Fuels CO 0.5%, 43 400 600 A/cm 2 ] age ean cell voltage wer density 11) 29-34; DO ITH HYDR n curve and gure the pola conditions is nsity of 292 ack perform perating at 0 V power de ng to the stac erature non s. Increasing DISTRIBU e and mean ate at 160°C d 9% at 400 ydrogen as poisoning ef peration is th hows the sta similar both arabolic patt ges; ch a very low sity variation w : H 2 and simul .15 % CO 2 ). 800 0 50 100 150 200 250 300 350 400 [mW/cm 2 ] I: 10.3221/IGF-E OGEN the stack p rization curv included. Th mW/cm 2 . T ance is lower .6 V power nsity is 338 k temperatur uniformity (s stack load TION OPER power den . Referring mA/cm 2 . Sta previously o fect, perform e voltage no ck voltage d for the hydro ern that is sim voltage of 0 ith ated Figu S SIS.15.04 ower density e and the po e stack has he maximum than single density is 221 mW/cm 2 for e distribution e e Fig. 8) . A tends to de ATING WITH sity variation to Tab. 1 per ck performan bserved in ance differen n-uniformity istribution a gen and refo ilar to that .326 V when re 6 : Voltage d tack mean tem reformate 0.3 0.4 0.5 0.6 0.7 1 V variation w wer density v a nominal po reached sta cell perform mW/cm 2 fo the single fu : at low load s performanc crease temp with load formance di ce related to [7, 8] where ce increases , since the lo t 200 mA/cm rmate case; of the stack the stack is istribution at 2 perature 160 (H 2 56.35%, C 5 9 1 Cell n H2 - 200 m Sim. reform H2 - 400 m Sim. reform ith load ope ariation with wer of 365 W ck power ha ance. Perform r the single el cell and 2 s the heat di es depend on erature non for the stack fferences bet reformate o a single fu as load incre west voltage 2 and 400 m temperature fuelled with r 00 mA/cm 2 a °C. Fuels: H 2 a O 0.5%, 43.15 3 17 21 umber A/cm2 ate - 200 mA/cm2 A/cm2 ate - 400 mA/cm2 rating with p load for a si at 0.5 V m s been 433 W ance differe fuel cell and 92 mW/cm 2 spersion thro temperatur uniformity t operating w ween the 2 ty peration are o el cell has b ase [17] . cell will limit A/cm 2 . Sev profile show eformate. nd 400 mA/c nd simulated % CO 2 ). 25 ure ngle ean at nce 162 for ugh e [1, hus ith pes nly een the eral n in m 2 .