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Catalyst Conversion to H,0 Catalyst PEM incel electrolytic efficiency is 0.75/1.23=61.%. How many cells do we need 14. If t varies with load: assume the voltage measured at full load is 0.75 V, so that an electrolysis cell, H,O is split into its hydro-

Catalyst Conversion to H,0 Catalyst PEM incel electrolytic efficiency is 0.75/1.23=61.%. How many cells do we need 14. If t varies with load: assume the voltage measured at full load is 0.75 V, so that an electrolysis cell, H,O is split into its hydro-

Delmar's Standard Textbook Of Electricity
Delmar's Standard Textbook Of Electricity
7th Edition
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter30: Dc Motors
Section: Chapter Questions
Problem 6RQ: What is CEMF?
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Electrochemical Q13

in series and what is the fate of this inefficiency? 13. In the fuel cell configuration in Exercise 12, the actual voltage delivered by the of the electrode metal in the half-cell. Explain whether or not it is possible to In Table 17.2 versus the density the cell electrolytic efficiency is 0.75/1.23=61.%. How many cells do we need cell varies with load; assume the voltage measured at full load is 0.75 V, so that design a cell that is both light and high voltage (say, more than 3V). 12 An industrial fuel cell has to supply a continuous 20.MW to a perfectly effi- cient inverter at 123 V. Assuming it uses a hydrogen gas/air PEM system, what are the needed flows of H, and air to the cells in standard m³/s? See the simpli- fied schematic that follows. Assume each fuel cell produces 1.23 V. e Load Anode Cathode O2 Catalyst Conversion to H,O Catalyst PEM t varies with load: assume the voltage measured at full load is 0.75 V, so that many cells do we need elem Tun a fuel cell in reverse as an electrolysis cell, H,O is split into its gen tary components, Ha(g) and ½ O,(g). This way we can make hydro- it acting as a fuel cell. If 14. If das
Transcribed Image Text:in series and what is the fate of this inefficiency? 13. In the fuel cell configuration in Exercise 12, the actual voltage delivered by the of the electrode metal in the half-cell. Explain whether or not it is possible to In Table 17.2 versus the density the cell electrolytic efficiency is 0.75/1.23=61.%. How many cells do we need cell varies with load; assume the voltage measured at full load is 0.75 V, so that design a cell that is both light and high voltage (say, more than 3V). 12 An industrial fuel cell has to supply a continuous 20.MW to a perfectly effi- cient inverter at 123 V. Assuming it uses a hydrogen gas/air PEM system, what are the needed flows of H, and air to the cells in standard m³/s? See the simpli- fied schematic that follows. Assume each fuel cell produces 1.23 V. e Load Anode Cathode O2 Catalyst Conversion to H,O Catalyst PEM t varies with load: assume the voltage measured at full load is 0.75 V, so that many cells do we need elem Tun a fuel cell in reverse as an electrolysis cell, H,O is split into its gen tary components, Ha(g) and ½ O,(g). This way we can make hydro- it acting as a fuel cell. If 14. If das
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