Well it seem our bus company are having all new Lecky busses
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Well it seem our bus company are having all new Lecky busses
Hydrogen storage is a problem. Several stages for getting it into cars.
1. Generate hydrogen - probably using electrolysis - uses energy.
2. Compress the hydrogen to put it into tanks (bottles?) - uses more energy
Then I think the way the hydrogen is used - probably some form of fuel cell - and the bottles would have to be swapped when the gas runs out.
I believe Toyota are selling a hydrogen based car.
https://www.toyota.co.uk/new-cars/new-mirai/
Could be hazardous having vehicles driving around with hydrogen bottles under pressure.
A couple of points - re the Mirai.
1. Hydrogen is perhaps most likely to be produced by steam reforming or gasification, rather than electrolysis. There are other ways.
At present gasification might help with other issues, such as waste disposal.
2. Hydrogen “bottles” are not swapped out, but rather the charging stations refill the containers with hydrogen under pressure.
I didn’t know this was possible/viable, but it seems it is the method used.
98% of hydrogen is produced by steam methane reforming, which emits carbon dioxide.
I didn’t know this, but see post 164 where I provided more details. Electrolysis is energy intensive, but if the electricity is produced “renewably” then no additional CO2 should be released. This might not always be the case, however.
Fuel cell efficiency as used in vehicles is unlikely to be much over 60% - a max of about 80% for the fuel cell/inverter, then a further loss in converting the electrical energy to motion.
https://auto.howstuffworks.com/fuel-...fuel-cell3.htm
Overall electric cars are a bit more efficient than hydrogen fuel cell cars - see the next page from the link above. Both are more efficient than petrol or diesel cars.
yes if we have enough renewables. just have to wait see i think. its fairly early days.. Think VW pulled out of it for now anyway. Toyota are continuing. they said they were losing 100k a car on the hydrogen one.. sure this will be as its new tech and when the laws of mass production(if it happens) kick in they will get it back.