The point on the fuel cell: fantasies and reality
According to the Interministerial Mission for the greenhouse effect, the transport sector is responsible alone for 26% of emissions of greenhouse gases (GHGs), an increase of 22% since 1990 reference date of the commitments of protocol Kyoto. Given this situation it is tempting to oppose a miracle solution, I appointed a fuel cell. However, many obstacles along the road to the fuel cell. Whether of a cyclical or structural, they highlight the lack of an ultimate solution to environmental problems.
What is a fuel cell (PAC)?
Operating under the same principle as a conventional battery, the energy of a chemical reaction is converted into electrical energy. Here the battery produces electricity by combining hydrogen (1) with oxygen in the air and releases of water. Hydrogen is an energy carrier, not a primary energy. In theory this sounds very appealing. Efficient Energy Source for electric vehicles, its constituents are abundantly present on the planet. Indeed hydrogen is the most common element in the universe, on earth can be found primarily in water but also in oil, protein, and sugar.
A lack of technological maturity
Encouraged by the demonstrators major automobile manufacturers, some believe that the fuel cell represents a credible alternative to engines running to hydrocarbons. It overlooks the fact that from a technical point of view the CAP is not reached maturity.
First, which serves as a catalyst to accelerate the chemical reaction between hydrogen and oxygen is platinum on batteries today. But this rare metal now costs 1400 1090 for only 28.35 euros g. Although the yield has been increased by 20 to 15 years dividing all the quantity necessary for the production of each unit, the presence of platinum remains an obstacle to the development of this technology. In addition, we extract only 200 to 300 tons of the metal per year, which is at a rate of 10 grams per car, only 20 million vehicles. Then, the whole system (electric motor, CAP, tanks, auxiliary elements and control) is very bulky and makes integration in a delicate vehicle. Finally the presence of a reservoir of hydrogen under high pressure (200 to 700 bar) poses problems in terms of security (explosion in the basement parking, transit tunnels banned) without even mentioning the energy required for compression. In addition dependability over long periods (200000 km for a car) is not yet guaranteed.
According to the Interministerial Mission for the greenhouse effect, the transport sector is responsible alone for 26% of emissions of greenhouse gases (GHGs), an increase of 22% since 1990 reference date of the commitments of protocol Kyoto. Given this situation it is tempting to oppose a miracle solution, I appointed a fuel cell. However, many obstacles along the road to the fuel cell. Whether of a cyclical or structural, they highlight the lack of an ultimate solution to environmental problems.
What is a fuel cell (PAC)?
Operating under the same principle as a conventional battery, the energy of a chemical reaction is converted into electrical energy. Here the battery produces electricity by combining hydrogen (1) with oxygen in the air and releases of water. Hydrogen is an energy carrier, not a primary energy. In theory this sounds very appealing. Efficient Energy Source for electric vehicles, its constituents are abundantly present on the planet. Indeed hydrogen is the most common element in the universe, on earth can be found primarily in water but also in oil, protein, and sugar.
A lack of technological maturity
Encouraged by the demonstrators major automobile manufacturers, some believe that the fuel cell represents a credible alternative to engines running to hydrocarbons. It overlooks the fact that from a technical point of view the CAP is not reached maturity.
First, which serves as a catalyst to accelerate the chemical reaction between hydrogen and oxygen is platinum on batteries today. But this rare metal now costs 1400 1090 for only 28.35 euros g. Although the yield has been increased by 20 to 15 years dividing all the quantity necessary for the production of each unit, the presence of platinum remains an obstacle to the development of this technology. In addition, we extract only 200 to 300 tons of the metal per year, which is at a rate of 10 grams per car, only 20 million vehicles. Then, the whole system (electric motor, CAP, tanks, auxiliary elements and control) is very bulky and makes integration in a delicate vehicle. Finally the presence of a reservoir of hydrogen under high pressure (200 to 700 bar) poses problems in terms of security (explosion in the basement parking, transit tunnels banned) without even mentioning the energy required for compression. In addition dependability over long periods (200000 km for a car) is not yet guaranteed.
posted by news of france at
8:16 AM
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