Solar power station an element of dispersed power system

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Solar power station an element of dispersed
power system
Boleslaw Mazurek

• Wroclaw Division of Electrotechnical Institute
• Wroclaw University of Technology, Dep. of
  Electrical Eng.

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Solar power system
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T-s Diagram of Rankine cycle
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Theoretical and real characteristics of fuel cell
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Vehicle mechanism
hydrogen
H2O
oxygen in the middle ion H3O
oxygen
H3O
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PEM Fuel Cellreactions
Anode reaction 2H2 ? 4H 4e-
Cathode reaction O2 4H 4e- ? 2H2O
Summary raction 2H2 O2 ? 2H2O
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Our construction of PEMFC
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V-I characteristics of IEL and commercial PEMFC
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SOFC Fuel Cellreactions
Cathode reaction 1/2O2 2e- ? O2-
Anode reactions H2 O2- ? H2O 2e- CO O2- ?
CO2 2e- CH4 4O2- ? 2H2O CO2 8e-
Summary reactions H2 1/2O2 ? H2O
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New electrolytes elaborated in IEL/OW for SOFC
application
Also investigation of scandium stabilized
zirconium oxide (e.g. ScSZ)
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Ionic conductivity measurements
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Typical Arhenius characteristics of electrolytes
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Typical impedance spectra of electrolyte
? - in reducing atmosphere ? - in oxide
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Our tubular SOFC
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SOFC V-I characteristics in the function of
temperature
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Electrolyte resistance ScSZ
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Designe of fuel cell test stand
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Our fuel cell test stand
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PEMFC stack specification
Performance DC voltage 10 V Current 50
A Nominal current density 500 mA/cm² at 0.7 V
(cell) Nominal power rating 500 W Stack
efficiency gt40 at 500 W Cell number 16,
effective area of each cell 100 cm² Air
requirement Nominal flow 35 SLPM Use efficiency
40 at 500 W Humidity 70-90 RH Inlet pressure
1.0-2.5 bar
Operating conditions Temperature 70-80
C Pressure 1.0-2.5 bar Coolant DI
water Coolant Flow 3.5 l/min. Physical Width 17
cm Height 11 cm Depth 20 cm Weight 12
kg Hydrogen fuel requirement H2 Commercial
grade (CO lt 1ppm) Nominal flow 7.5 SLPM Humidity
70-95 RH Inlet pressure 1.0-2.5 bar
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Characteristic of commercial 500 W PEM stack
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Thank you for your attention !