2008 BMW Hydrogen 7

specs

Model BMW Hydrogen 7
Engine 5972cc, 12 cylinders
Power 260bhp @ 5100rpm
Torque 287 lb ft @ 4300rpm
Transmission Six-speed automatic
Fuel 19.2mpg (hydrogen) / 20mpg (petrol)
CO2 5.2g/km (hydrogen) / 325g/km (petrol)
Performance 0-62mph: 9.5sec. Top speed: 143mph
Range 125 miles (hydrogen) 310 miles (petrol)
Price £5m (but not on sale)
(from /www.timesonline.co.uk)


The BMW hydrogen car is is BMW fist dual gas or hydrogen car put in production. The car is vary similar to the BMW 760Li in the way it looks and feels, even the engine is replicated but
modified to use both gas and hydrogen. Unlike other hydrogen powered vehicles made by other manufactures the BMW hyro 7 doesn't use fuel cell technology which uses hydrogen to make electricity but rather directly ignites the hydrogen in its internal combustion engine.

hydrogen vs gas energy
One of the problems associated with hydrogen is its low energy density and the amount of consumption it takes for power compared to (Gasoline 34.6 mj/l, liquid hydrogen 10.1).
another problem with hydrogen gas is the amount of energy needed to store it because in order
for liquid hydrogen to remain in a liqiud state it must be kept a vary cool temperatures ( below 253 °C (−423.4 °F).), and when fuel is not being usesed the tank warms and the hydrogen starts
to vaporize, and when the tank’s internal pressure reaches 87 PSi the tank will safely vent the building pressure. Over 10-12 days, it will completely lose the contents of the tank because of this.