| Conversion business |
|
 |
|
|
About Compressed Natural Gas（CNG）Vehicles Prospect
There are over 120,000 NGVs on U.S. roads today and over 8.7 million worldwide.
Natural gas costs, on average, one-third less than conventional gasoline at the pump.
Over 50 different manufacturers produce 150 models of light, medium and heavy-duty vehicles and engines.
Roughly 22 percent of all new transit bus orders are for natural gas.
Benefits of NGVs Petroleum Displacement
Making America less dependent on foreign oil is a national priority. In his 2006 State-of-the-Union address, President Bush stated that we are “addicted to oil,” and his Administration is dedicated to reducing that addiction. Congress, too, is strongly on record in support of reducing petroleum use, and has passed a number of pieces of legislation to incentive Americans to move to non-petroleum fuels. While in 2005, the U.S. imported over 65 percent of the oil it used, 97 percent of the natural gas used in the U.S. was produced in North America. Every gallon equivalent of natural gas used in vehicles is one less gallon of petroleum that has to be imported.
The Chinese government also encourage the people reduce the consumption of petroleum and use environment-friendly energy. Thus, Natural Gas becomes the best choice. To promote the development of gas vehicles, Chinese government organized the state coordination and leading group of vehicles with clean fuel headed by Science and Technology Ministry in 1999. The 12 cities of Beijing, Shanghai, Tianjin, Chongqing, Ha’erbin, Changchun, Xi’an, Wulumuqi, Chengdu, Guangzhou, Shenzhen, and Haikuo are assigned as the pilot cities of “Air purification engineering—clean activities of vehicles.
During the years of “Eleventh Five Years Plan”, new style clean energy vehicle has listed in the medium-long term of national science development schedule. The Chinese government would continue organize material science items of a variety of clean energy vehicles, including technologies of natural gas vehicles, which will further promote the development of natural gas vehicles.
Exhaust emissions from a typical NGV are much lower than those from gasoline-powered vehicles. For example, the natural gas-powered Honda Civic GX is recognized by the U.S. EPA as the cleanest commercially available, internal-combustion vehicle on earth. The Civic GX is rated by the California Air Resources Board as meeting the very stringent AT-PZEV standard. In addition, dedicated NGVs produce little or no evaporative emissions during fueling and use. In gasoline vehicles, evaporative and fueling emissions account for at least 50 percent of a vehicle's total hydrocarbon emissions.
Typical dedicated NGVs can reduce exhaust emissions of:
• Carbon monoxide (CO) by 70 percent
• Non-methane organic gas (NMOG) by 87 percent
• Nitrogen oxides (NOx) by 87 percent
• Carbon dioxide (CO2) by almost 20 percent below those of gasoline vehicles.
Greenhouse Gases
Per unit of energy, natural gas contains less carbon than any other fossil fuel, and thus produces lower carbon dioxide (CO2) emissions per vehicle mile traveled. While NGVs do emit methane, another principle greenhouse gas, any increase in methane emissions is more than offset by a substantial reduction in CO2 emissions compared to other fuels. Tests have shown that NGVs produce up to 20 percent less greenhouse gas emissions than comparable gasoline vehicles and up to 15 percent less than comparable diesel vehicles.
Safety
The fuel storage cylinders used in NGVs are much stronger than gasoline fuel tanks. The design of NGV cylinders are subjected to a number of federally required “severe abuse" tests, such as heat and pressure extremes, gunfire, collisions and fires.
NGV fuel systems are “sealed," which prevents any spills or evaporative losses. Even if a leak were to occur in an NGV fuel system, the natural gas would dissipate up into the air because it is lighter than air.
Natural gas has a high ignition temperature, about 1,200 degrees Fahrenheit, compared with about 600 degrees Fahrenheit for gasoline. It also has a narrow range of flammability, that is, in concentrations in air below about 5 percent and above about 15 percent, natural gas will not burn. The high ignition temperature and limited flammability range make accidental ignition or combustion of natural gas unlikely. Thus, the NGV’s ignition system is safe.
|
|
|
|
