1.4. Advantages of DDF
1-4-1 Energy and fuel cost saving
- Dramatically increase the fuel efficiency
of CNG, one of the most important natural resources, at least 30% without
any extra inputs, due to much higher compression ratio.
- Dramatically deduce the fuel cost at least
20%, based upon current price structure in Taiwan.
- Clean fuel with better energy conservation, the mechanical efficiency is as the same as diesel ones.
1-4-2 Highest Social cost saving
- Highest social saving, due to air-pollution improved
dramatically.
1-4-3 Lowest Life cycle cost (LCC)
- Lowest LCC, much cheaper than dedicated CNG engine/vehicle, due to
cheaper CNG fuel cost and better C/P retrofit cost.
- Life expectancy for existing used diesel engine elongated by DDF.
1-4-4 Lowest Overall total cost
- Lowest overall total cost, due to cheaper CNG fuel cost and better C/P retrofit cost.
- Most powerful and economical tools to easily convert existing massive, dirty, old, cheap diesel engine into LEVS (Low Emission Vehicles)
1-4-5 Safety
- Natural gas is 0.6
times lighter than air, thus it quickly diffuses when exposed to air
- Natural gas has higher
combustion points than other fuels, thus less concern for fire accidents
(Combustion points: CNG 540℃, LPG 476℃, Gasoline 260℃, Diesel 257℃).
- In many countries, CNG refueling stations have been proven very safe, allowing it to be installed in residential, school, apartments areas, in mixture with other fuel stations and on the top of a building roof.
1-4-6 Environmental Friendly- Engines performance highly improved
- DDF perform just like CNG vehicle. In comparison to diesel vehicles, DDF emit zero smoke, 70% reduction of ozone-forming pollutants such as NOx. Extensively improve the emission of diesel engine and can comply with most stringent regulation of emission control.
Table 2 Emission comparison between Diesel and CNG bus (from Korean NG station and current status.doc)
- Become more quite and stable, at least 2~3 db(A) lower.
- Much safer due to fuel system improved by adopting CNG.