Hi Ken,

I do understand how it works - by reforming hydrogen out of the methane, just like Toyota propose doing from gasoline in some of their FCV prototypes.

But my point is that the original fuel supply of the machine is not hydrogen - if it was, its overall efficiency would be terrible. You'll notice that generation of electricity from the hydrogen is only 31% - less than a power station. The only reason they quote the efficiency as being higher is because you get the waste heat, which would otherwise be lost.

I agree that if you are going to burn methane, doing so in a way like this that uses the waste heat is better than most, but I don't think piping hydrogen to homes for use in fuel cells is viable.

http://mysite.wanadoo-members.co.uk/ecotech/ecot.htm