Ideas for deployment

Transport first: Shell, Tesco, etc. to offer LH2 at some filling stations that can accommodate the necessary vehicles. These would use underground tanks and feed either LH2 or gaseous H2. The H2 should be produced by Solar or wind to ensure renewability.

Need to figure out how much taxis and buses consume per day. Work out total generation requirement. Factor generation requirement by generation efficiency (% time generating (wind/ solar), losses, liquefaction, storage losses (transport and in situ), transfer losses) to get total generation capacity requirement.

New build or intercept existing devices? Haverigg? Local storage (problem in picturesque areas (big hole)) vs. remote (would need grid). Could treat remote generation and storage as PowerGen's "Green Plan" where for each unit consumed by the H2 generator, a renewable unit is acquired. Pushes demand for renewable and separates out (geographically and commercially) primary energy capture vs.  secondary energy carrier/ fuel creation.

Seaforth docks? Container trucks (which move containers from ship unload area to bonded hangars) could be H2. Use local Wind farm to generate H2. Industrial area so LH2 storage should be feasible. Cost of electrolyser, truck modification, storage. Savings of diesel. Tax? Short range shouldn't be a problem. Possible expansion to allow other trucks to use fuel also as they become available. Buses and taxis also (not far from City centre). Re: tax - if locally generated could the cycle work internally to a company and therefore avoid tax on all running costs except the incoming electricity?

This implies test-cases. As per everywhere else, pick an area and work on it. Seaforth, everything co-located so minimise dispersion issues, maximise "executive summary" value. Needs to be scaleable (start small), useful and have no inherent reason why it would be time limited (self-financing).

Need to build:

• ·confidence in the technology, (safety, efficiency, affordability)
• ·understanding of the system, (maximise analogies to existing systems, filling stations, self-service, 2-3 minutes to fill-up)
• Public awareness of:
• ·underlying need for change, (emphasise oil prices, dependence)
• ·time-scales: both of change driver (fuel prices) & replacement development & deployment

Transport of LH2 via street tanker: boil-off caused by excitation of transport could be fed into the truck's power system.

Regenerative braking: initially into ultracapacitors, which feed traction motors if required immediately, or into utilities then maybe electrolyser if some fuel cell output vapour is condensed to water and stored on board. Need to identify quantities: typical regenerative braking return, capacity of ultracapacitor, size of water tank, issues of condensing, storing and electrolysing - seems like a potentially disproportionate overhead for the net savings. Potentially link on on-roof solar-panel to augment small scale re-generation of gas H2 into buffer tank. Demands H2 compressor, medium pressure buffer tank and proportionate water tank. Definitely an option for specialist off-road, long duration vehicles with deployable solar panels above or under roof-rack.

Boil-off from on-board LH2 tanks - could this power utilities (clock, GPS, cell phone). Buffer gas H2 from evaporator into tank which feeds fuel-cell. In principle, no need for batteries, which removes the "flat-battery" problem, weight and space of battery + charging equipment. However, running out of fuel would prevent starting so would such a car need a reserve? Maybe if  LH2 empty, shut-down and run utilities on gas H2 in buffer tank.

LH2 filling stations could use boil-off or just the evaporated fuel to power pumps and other site facilities.

Methanol: CH2OH? This would have to be generated synthetically from sustainable/ renewable sources.