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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-

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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Electrochemical Q13

**Transcription:** 12. An industrial fuel cell has to supply a continuous 20 MW to a perfectly efficient inverter at 123 V. Assuming it uses a hydrogen gas/air PEM system, what are the needed flows of H₂ and air? See the simplified schematic that follows. Assume each fuel cell produces 1.23 V. 13. In the fuel cell configuration in Exercise 12, the actual voltage delivered by the cell varies with load; assume the voltage measured at full load is 1.15 V. Explain whether or not it is possible to design a cell that is both light and small with a high efficiency. How many cells do we need in series and what is the cell electrolytic efficiency, η, of the electrode metal in the half-reaction involving H₂O? If you run a fuel cell in reverse as an electrolysis cell, H₂O is split into its elements H₂(g) and O₂(g). This way we can make hydrogen and have components for outside ref power. The stored gases can be reversed as a fuel cell. If 14. ...of the electrode metal in the half-reaction involving H₂O? If you run a fuel cell in reverse as an electrolysis cell, H₂O is split into its elements H₂(g) and O₂(g). This way we can make hydrogen and have components for outside ref power. The stored gases can be reversed as a fuel cell. If **Diagram Explanation:** The schematic diagram displays a Proton Exchange Membrane (PEM) fuel cell. Essential components and processes are labeled as follows: - **Anode:** The section where hydrogen (H₂) gas enters the fuel cell. - **Cathode:** The section where oxygen (O₂) gas is delivered and where the reduction reaction occurs. - **Catalyst:** A layer located at both the anode and cathode sides to facilitate the respective chemical reactions. - **PEM (Proton Exchange Membrane):** Lies between the anode and cathode, allowing H⁺ ions to pass through while restricting gases and electrons. - **Conversion to H₂O:** Indicates the process where oxygen combines with electrons and protons to form water. - **Load:** Signifies the electrical load, where the generated electricity flows to perform work. - **e⁻ (electron flow):** Indicates the flow of electrons through an external circuit from anode to cathode. The diagram highlights the essential reactions and
Transcribed Image Text:**Transcription:** 12. An industrial fuel cell has to supply a continuous 20 MW to a perfectly efficient inverter at 123 V. Assuming it uses a hydrogen gas/air PEM system, what are the needed flows of H₂ and air? See the simplified schematic that follows. Assume each fuel cell produces 1.23 V. 13. In the fuel cell configuration in Exercise 12, the actual voltage delivered by the cell varies with load; assume the voltage measured at full load is 1.15 V. Explain whether or not it is possible to design a cell that is both light and small with a high efficiency. How many cells do we need in series and what is the cell electrolytic efficiency, η, of the electrode metal in the half-reaction involving H₂O? If you run a fuel cell in reverse as an electrolysis cell, H₂O is split into its elements H₂(g) and O₂(g). This way we can make hydrogen and have components for outside ref power. The stored gases can be reversed as a fuel cell. If 14. ...of the electrode metal in the half-reaction involving H₂O? If you run a fuel cell in reverse as an electrolysis cell, H₂O is split into its elements H₂(g) and O₂(g). This way we can make hydrogen and have components for outside ref power. The stored gases can be reversed as a fuel cell. If **Diagram Explanation:** The schematic diagram displays a Proton Exchange Membrane (PEM) fuel cell. Essential components and processes are labeled as follows: - **Anode:** The section where hydrogen (H₂) gas enters the fuel cell. - **Cathode:** The section where oxygen (O₂) gas is delivered and where the reduction reaction occurs. - **Catalyst:** A layer located at both the anode and cathode sides to facilitate the respective chemical reactions. - **PEM (Proton Exchange Membrane):** Lies between the anode and cathode, allowing H⁺ ions to pass through while restricting gases and electrons. - **Conversion to H₂O:** Indicates the process where oxygen combines with electrons and protons to form water. - **Load:** Signifies the electrical load, where the generated electricity flows to perform work. - **e⁻ (electron flow):** Indicates the flow of electrons through an external circuit from anode to cathode. The diagram highlights the essential reactions and
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