大象传媒

Evaluating the use of fuel cells

In evaluating the use of , the following should be considered:

  • the impact on the environment 鈥 from the cell as it is used and emissions when the fuel is produced
  • the impact on the user 鈥 cost, how well it works, how long the fuel cell can run without refuelling, how it compares with existing technology

Advantages of using fuel cells in cars

The use of hydrogen-oxygen fuel cells in cars reduces:

  • carbon dioxide emissions (because water is the only product)
  • air pollution where the car is being driven
  • reliance on

Disadvantages of using fuel cells in cars

There are disadvantages to using hydrogen-oxygen fuel cells in cars. These include:

  • hydrogen is in the gas state at room temperature and pressure, so it is difficult to store in the car
  • fuel cells and electric motors are less durable than petrol engines and diesel engines, so they are not so long-lasting
  • fuel cells are very expensive
  • there is no countrywide network of hydrogen filling stations at the moment
  • some methods of producing the hydrogen fuel release carbon dioxide and other into the

There are also safety concerns about the use of hydrogen because it is highly flammable. However, petrol and diesel are also highly flammable.