hydrogen fuel cells & energy efficiency ib sl. hydrogen fuel cell? definition: electrochemical...
TRANSCRIPT
![Page 1: Hydrogen Fuel Cells & Energy Efficiency IB SL. Hydrogen Fuel Cell? Definition: Electrochemical cell that converts a source fuel into an electrical current](https://reader036.vdocument.in/reader036/viewer/2022062722/56649f315503460f94c4d62d/html5/thumbnails/1.jpg)
Hydrogen Fuel Cells &
Energy EfficiencyIB SL
![Page 2: Hydrogen Fuel Cells & Energy Efficiency IB SL. Hydrogen Fuel Cell? Definition: Electrochemical cell that converts a source fuel into an electrical current](https://reader036.vdocument.in/reader036/viewer/2022062722/56649f315503460f94c4d62d/html5/thumbnails/2.jpg)
Hydrogen Fuel Cell?
• Definition: Electrochemical cell that converts a source fuel into an electrical current.
• The fuel cell generates electricity through reactions between a fuel and an oxidant.
![Page 3: Hydrogen Fuel Cells & Energy Efficiency IB SL. Hydrogen Fuel Cell? Definition: Electrochemical cell that converts a source fuel into an electrical current](https://reader036.vdocument.in/reader036/viewer/2022062722/56649f315503460f94c4d62d/html5/thumbnails/3.jpg)
Hydrogen Fuel Cells
• A hydrogen fuel cell uses hydrogen
as its fuel and oxygen as its oxidant.
• Its very similar to a battery but it has
its differences.
• Discovered by Christian Firedrich
Schönbien in 1838.
![Page 4: Hydrogen Fuel Cells & Energy Efficiency IB SL. Hydrogen Fuel Cell? Definition: Electrochemical cell that converts a source fuel into an electrical current](https://reader036.vdocument.in/reader036/viewer/2022062722/56649f315503460f94c4d62d/html5/thumbnails/4.jpg)
![Page 5: Hydrogen Fuel Cells & Energy Efficiency IB SL. Hydrogen Fuel Cell? Definition: Electrochemical cell that converts a source fuel into an electrical current](https://reader036.vdocument.in/reader036/viewer/2022062722/56649f315503460f94c4d62d/html5/thumbnails/5.jpg)
Benefits•Reduction in burning of fuel cells.•Improvement of air quality especially in urban areas.•Reduction of greenhouse gases (global warming).•Low noise and high power.•Reduction in energy consumption (saving energy).
![Page 6: Hydrogen Fuel Cells & Energy Efficiency IB SL. Hydrogen Fuel Cell? Definition: Electrochemical cell that converts a source fuel into an electrical current](https://reader036.vdocument.in/reader036/viewer/2022062722/56649f315503460f94c4d62d/html5/thumbnails/6.jpg)
Problems•Cost.
•Durability.
•Hydration.
•Delivery.
•Infrastructure.
•Storage.
•Safety.
![Page 7: Hydrogen Fuel Cells & Energy Efficiency IB SL. Hydrogen Fuel Cell? Definition: Electrochemical cell that converts a source fuel into an electrical current](https://reader036.vdocument.in/reader036/viewer/2022062722/56649f315503460f94c4d62d/html5/thumbnails/7.jpg)
Examples
•Vehicles.
•Bicycles.
•Rockets.
•Airplanes.
•Buses.
•Motorcycles.
•Scooters.
![Page 8: Hydrogen Fuel Cells & Energy Efficiency IB SL. Hydrogen Fuel Cell? Definition: Electrochemical cell that converts a source fuel into an electrical current](https://reader036.vdocument.in/reader036/viewer/2022062722/56649f315503460f94c4d62d/html5/thumbnails/8.jpg)
Hydrogen Automobile
• An alternative fuel vehicle which uses hydrogen as its fuel.
• Chemical energy in hydrogen is converted into mechanical energy.
• Funding comes from both private and government sources.
• Cost around $400,000.• "It's still a ways away from
commercialization"
![Page 9: Hydrogen Fuel Cells & Energy Efficiency IB SL. Hydrogen Fuel Cell? Definition: Electrochemical cell that converts a source fuel into an electrical current](https://reader036.vdocument.in/reader036/viewer/2022062722/56649f315503460f94c4d62d/html5/thumbnails/9.jpg)
BENEFITS
• Reduce greenhouse gases.• Reduce dependency on oil.• Technological development.
PROBLEMS
• Expensive.• Needs hydrogen gas stations.• "A hydrogen car is one of the least
efficient, most expensive ways to reduce greenhouse gases.“ U.S Department.
![Page 10: Hydrogen Fuel Cells & Energy Efficiency IB SL. Hydrogen Fuel Cell? Definition: Electrochemical cell that converts a source fuel into an electrical current](https://reader036.vdocument.in/reader036/viewer/2022062722/56649f315503460f94c4d62d/html5/thumbnails/10.jpg)
Ford edge hybrid-2007
![Page 11: Hydrogen Fuel Cells & Energy Efficiency IB SL. Hydrogen Fuel Cell? Definition: Electrochemical cell that converts a source fuel into an electrical current](https://reader036.vdocument.in/reader036/viewer/2022062722/56649f315503460f94c4d62d/html5/thumbnails/11.jpg)
The Evolution, General Motors
![Page 12: Hydrogen Fuel Cells & Energy Efficiency IB SL. Hydrogen Fuel Cell? Definition: Electrochemical cell that converts a source fuel into an electrical current](https://reader036.vdocument.in/reader036/viewer/2022062722/56649f315503460f94c4d62d/html5/thumbnails/12.jpg)
Hydrogen Rocket
BENEFITS• Highest effective exhaust velocity.• Lower weight.• Velocity change (lift off weight is
less).• Works well in upper stages.
PROBLEMS• Low density, needs insulation
(weight).
![Page 13: Hydrogen Fuel Cells & Energy Efficiency IB SL. Hydrogen Fuel Cell? Definition: Electrochemical cell that converts a source fuel into an electrical current](https://reader036.vdocument.in/reader036/viewer/2022062722/56649f315503460f94c4d62d/html5/thumbnails/13.jpg)
![Page 14: Hydrogen Fuel Cells & Energy Efficiency IB SL. Hydrogen Fuel Cell? Definition: Electrochemical cell that converts a source fuel into an electrical current](https://reader036.vdocument.in/reader036/viewer/2022062722/56649f315503460f94c4d62d/html5/thumbnails/14.jpg)
Efficiency• Dependent on the amount of power drawn
from the fuel cell.• For a hydrogen cell operating at standard
conditions with no reactant leaks, the efficiency is equal to the cell voltage divided by 1.48 V, based on the reaction.
• The more current drawn, the lower the efficiency.
• The efficiency of a cell is almost proportional to its voltage.
• Do not operate in thermal cycle.
![Page 15: Hydrogen Fuel Cells & Energy Efficiency IB SL. Hydrogen Fuel Cell? Definition: Electrochemical cell that converts a source fuel into an electrical current](https://reader036.vdocument.in/reader036/viewer/2022062722/56649f315503460f94c4d62d/html5/thumbnails/15.jpg)
Activity
• From what you have just seen, answer the following questions...
1.Design a poster for a hydrogen car promoting its benefits over the normal average everyday car.
2.Come up with a campaign against the promotion of hydrogen as a renewable energy source.