European Journal of Scientific Research - EuroJournals

Photovoltaic-Stand-Alone Hydrogen System 389
Table 1: Effect of concentration on hydrogen production with volume converted to standard temperature and
pressure (s.t.p).
Platinum Electrode
Hydrogen
cell Conc./M
Hydrogen cell
Voltage/V
Hydrogen cell
Current/A
Volume of
Hydrogen/ml/min
Volume of
hyd. at s.t.p
Power/W Efficiency /%
0.2 11.41 0.21 1.5 1.2864 2.3961 9.73
0.4 10.98 0.40 3.6 3.0876 4.3920 12.75
0.6 10.63 0.57 4.2 3.6019 6.0591 10.78
0.8 10.23 0.71 5.5 4.7167 7.2633 11.77
1.0 9.18 1.12 8.6 7.3752 10.2816 13.01
Table 2: Simulated volume of hydrogen produced based on the experimental concentration.
Simulatiom using Faraday's Law
Hydrogen cell Conc./M Hydrogen cell Current/A Mole of Hydrogen Volume of Hydrogen/ml/min
0.20 0.21 0.000065 1.462383
0.40 0.40 0.000124 2.785492
0.60 0.57 0.000177 3.969326
0.80 0.71 0.000221 4.944249
1.00 1.12 0.000348 7.799378
Table 3: Electrolysis using Carbon electrode with varying hydrogen cell concentration from 0.2M to 1.0M.
Hydrogencell
Conc./M
Hydrogen cell
Voltage/V
Hydrogen-cell
Current/A
Carbon Electrode
Volume of
Hydrogen/ml/min
Volume of
hyd. at s.t.p
Power/W Efficiency / %
0.2 11.75 0.20 1.6 1.3721 2.3500 10.59
0.4 11.54 0.40 3.2 2.7443 4.6160 10.78
0.6 11.32 0.56 4.4 3.7734 6.3392 10.79
0.8 11.12 0.74 5.6 4.8025 8.2288 10.58
1.0 10.54 1.21 9.2 7.8898 12.7534 11.22
Table 4: Influence of load on the Battery voltage and simultaneous volume of hydrogen produced.
Temp/ºC Batt-Volt Vol. of Hy/min Time/min Temp/ºC Batt-Volt Vol. of Hy/min Time/min
28.41 12.19 7.4088 0 28.26 11.62 7.0658 18
28.35 11.87 7.2226 1 28.26 11.62 7.0658 19
28.32 11.87 7.2226 2 28.26 11.61 7.0658 20
28.32 11.93 7.2618 3 28.26 11.58 7.0462 21
28.29 11.86 7.2128 4 28.29 11.57 7.0364 22
28.29 11.84 7.2030 5 28.29 11.66 7.0854 23
28.26 11.69 7.1148 6 28.29 11.58 7.0462 24
28.26 11.72 7.1246 7 28.29 11.57 7.0364 25
28.26 11.70 7.1148 8 28.29 11.58 7.0462 26
28.26 11.70 7.1148 9 28.29 11.56 7.0364 27
28.26 11.69 7.1148 10 28.29 11.56 7.0266 28
28.26 11.68 7.1050 11 28.29 11.58 7.0462 29
28.26 11.68 7.1050 12 28.32 11.58 7.0462 30
28.26 11.74 7.1344 13 28.32 11.57 7.0364 31
28.26 11.66 7.0854 14 28.32 11.64 7.0756 32
28.26 11.65 7.0854 15 28.32 11.59 7.0462 33
28.26 11.64 7.0756 16 28.32 11.57 7.0364 34