hydrogen production from water using solar cells powered nafion ...

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Figure 4.18. Solar Radiance on 22.02.2007 Hydrogen production of the system is given in Figure 4.18. for the same day. On this day, as compared to the previous examples, electrolysis continued up to 17.00PM due to that long day light observed in that month. At the end of the day, total hydrogen production was found to be 55L. Hydrogen Production (ml/min) 600 500 400 300 200 100 Measured Hydorgen Production and Stack Temperature vs. Time (22.02.2007) 0 20 08:00:00 10:00:00 12:00:00 14:00:00 16:00:00 18:00:00 Hydrogen Production Stack Temperature Time Figure 4.19. Hydrogen Production and Stack Temperature on 22.02.2007 55 50 45 40 35 30 25 Stack Temperature o C 62
Figure 4.19 shows solar radiance data on Iztech campus on a clear day (14 May 2007). The maximum radiance was observed as 950W/m 2 at 13.30PM. Total daylight time which is adequate for electrolysis was about 13 hours. Figure 4.20. Solar Radiance Data on 14.05.2007 The hydrogen production and stack temperature data for the same day is given in Figure 4.20. The maximum hydrogen generation at 13.30PM was measured as 708ml/min. The maximum stack temperature was measured as 53.2 o C at the same time. The electrolysis continued up to 20.00PM since day time saving started on 25.03.07. Total hydrogen production was calculated to be 344L at the end of the day. 63
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HYDROGEN PRODUCTION FROM WATER USIN
Page 3 and 4:
ACKNOWLEDGEMENTS This study was car
Page 5 and 6:
ÖZET GÜNEŞ PĐLLERĐ ĐLE ÇALI
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4.2. Results on a Single Cell PEM E
Page 9 and 10:
Figure 4.16. Hydrogen Production an
Page 11 and 12:
CHAPTER 1 INTRODUCTION World energy
Page 13 and 14:
Table 1.1. Turkey`s energy usage as
Page 15 and 16:
atmosphere according to their hydro
Page 17 and 18:
The reaction goes through two half
Page 19 and 20:
2.1. Hydrogen Production Methods CH
Page 21 and 22: 2.2. Electrolyzers Figure 2.1. Vari
Page 23 and 24: electrode design are being sought t
Page 25 and 26: 1 285,830J/mol + H 2O(l) → H 2(g)
Page 27 and 28: another optimization should be done
Page 29 and 30: Figure 2.3. Molecular Formula of Na
Page 31 and 32: hydrophobic substances in electrode
Page 33 and 34: Different than Grigoriev’s work,
Page 35 and 36: voltages. This concept is also vali
Page 37 and 38: Interdigitated flow field is a diff
Page 39 and 40: generator is always working at its
Page 41 and 42: ecord the voltage and the current s
Page 43 and 44: Figure 3.2. Anode side of the elect
Page 45 and 46: 6. Cover the cathode GDL with 1mm t
Page 47 and 48: to deliver water. The front side of
Page 49 and 50: 5. Place the cathode side GDL into
Page 51 and 52: electrolyzer to monitor the potenti
Page 53 and 54: Figure 4.1. “X” type flow field
Page 55 and 56: MEA, there were no electrolysis on
Page 57 and 58: In fact, it was observed on the dis
Page 59 and 60: In each run, current density was in
Page 61 and 62: Voltage 2,25 2,20 2,15 2,10 2,05 2,
Page 63 and 64: Therefore, for the current cell des
Page 65 and 66: 8Amp, respectively. The calculated
Page 67 and 68: At 500mAmp/cm 2 , the potential dif
Page 69 and 70: The installed system had 6 of this
Page 71: At 11.00 AM, as the current density
Page 75 and 76: On Iztech campus, the system constr
Page 77 and 78: voltage temperature trend observed
Page 79 and 80: REFERENCES Grigoriev S.A.,Porembsky
Page 81 and 82: British Petrol World Statistical Re
Page 83 and 84: Hydrogen Production (ml/min) Hydrog
Page 85 and 86: Hydrogen Production (ml/min) Hydrog
Page 87 and 88: APPENDIX B MASS BALANCE OF A FIVE C
Page 89 and 90: Table B.3. Mass Balance of Species
Page 91 and 92: Stream3; Species stream 3 at 314.6K
Page 93 and 94: Figure B.3. Input and output stream
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