More articles on the Dearman engine please
The Dearman engine runs on liquid air/nitrogen, which is a better for automotive engery storage than either batteries of hydrogen.
The real problems with hydrogen fuel cells are:
- Cost of the hydrogen, sure industrial hydrogen can be cheap, but fuel cells require 99.99% pure hydrogen to avoid fouling, and the cheapest way to produce that is (expensive) electrolysis (cheaper than filtering dirty hydrogen).
- Expensive storage and transport of the hydrogen (requires specially lined pipes as it embrittles steel).
The Dearman engine also provides 'free' air con, and is being trialed in refrigerated trucks in London.