Fuel cells plumb new depths Spanish plan fuel cell powered submarine James Murray, BusinessGreen, 06 Dec 2007 They have already been used in space and now low-carbon fuel cells are set to break another barrier after UTC Power announced it has inked a deal to provide a new 300KW fuel cell for use in the Spanish Navy's S-80 submarine. The company said the deal with Spanish shipbuilder Navantia represented one of the largest deals in its history and would see it develop a new proton exchange membrane (PEM) fuel cell for the submarine. "One of the places that fuel cells...