True, an EV emits no fumes directly from the tailpipe, for it has none, but then there is the question of how electric energy propeling the car is produced and – which is rarely taken into account – what happens when an EV runs out of juice in the middle of nowhere. The penultimate speech was delivered by David Graebe of Gazprom Germania, who also aimed at pointing out the environmental advantages of CNG and LNG over conventional fuels and even over electric propulsion, which is widely considered the most eco-friendly solution. Switching to LNG lowers mass to 290 kg, which is much more acceptable. 250 kg (when full), whereas a set of CNG tanks containing the same amount of energy tips the scales at over 1150 kg. For instance, a 208-litre diesel tank weighs approx. The speaker also highlighted the advantages of using methane in its liquefied form (LNG), which compensates high weight of CNG tanks and solves range-related issues. This is because methane is the simplest hydrocarbon there is (CH 4) and, naturally, its combustion produces fewer harmful particles than petrol (C 8H 18), not to mention diesel (C 14H 30). Regardless of nominal fuel economy figures, methane-based fuels are always characterised by ultra low emissions. CNG's high octane number (up to 140), makes it possible to raise an engine's compression ratio, thus enhancing its efficiency and lowering energy consumption. Moving forward, Ryszard Woloszyn, speaking for the NGV Poland Association (Stowarzyszenie NGV Polska), presented methane-based fuels from a technical and physicochemical perspective. © Though it may look like dealing with liquefied nitrogen or hydrogen, it is just extremely cooled methane
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