Combustion Engines


	Combustion Engines
	Advantages Technology well understood, as most cars have them Methane from which hydrogen is made can be a renewable resource Just water- clean	Disadvantages Less efficient Nitrogen+ oxygen react in the engine to produce oxides of nitrogen+ water Few fuel stations supplying hydrogen as a fuel Needs recharging from the mains Although hydrogen can be made from water, you still need energy from another source to make it Hydrogen is hard to store safely- explosive Need a special, expensive engine
	Evaluation Hydrogen is burnt in oxygen as a fuel, which drives the turbine

Less efficient
Nitrogen+ oxygen react in the engine to produce oxides of nitrogen+ water
Few fuel stations supplying hydrogen as a fuel
Needs recharging from the mains
Although hydrogen can be made from water, you still need energy from another source to make it
Hydrogen is hard to store safely- explosive
Need a special, expensive engine

Hydrogen is burnt in oxygen as a fuel, which drives the turbine

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