CAP Biogas Technology To Be Installed On United Utilities Trucks

Clean Air Power Limited  are converting UU’s diesel trucks at Davyhulme  the sewage treatment works serving the large Northern City of Manchester, famous for its football teams, to run on dual fuel diesel-biomethane. The basic idea has been around for years,  essentially methane is fed into the inlet of an ordinary diesel engine, where the governor will automatically rack back the diesel to deliver the same power for a particular power setting and permits about 85% diesel fuel subsitution but with very poor emissions, but CAP have presumably made it more sophisticated since they claim  63 patents are currently held or pending and imply a much greater level of substitution with better emissions.

Clean Air Power Limited  announced that on 2nd January 2009 it signed a Letter of Intent with Volvo Powertrain (Volvo) to incorporate Clean Air Power’s Dual-FuelTM technology into Volvo Truck engines.

Incorporating Clean Air Power’s Dual-FuelTM technology into these trucks they say will deliver significant greenhouse gas emissions reductions and fuel cost savings compared with standard diesel engines. Additionally these Dual-FuelTM trucks are expected to be around 20% more efficient than equivalent spark ignited natural gas engines.

The products will have the Clean Air Power technology fully interfaced with the Volvo engine management system and will be applied to Volvo’s D13 engine. This will provide the opportunity for greater levels of gas substitution than Clean Air Power’s existing Genesis system, with corresponding improved emissions and fuel cost reductions. 

Wessex Water ran a number of vehicles at the Avonmouth sewage treatment works in Bristol about 20 years ago under the then manager Martin Alder. It was killed because the VAT office reneged on a written agreement not to charge vehicle excise duty. Even earlier, Croydon STW also used to fuel municipal vehicles in this way.

Further info see:

http://claverton-energy.com/pipermail/claverton-group_claverton-energy.com/2009-January/000349.html

2 Comments

  1. Reply

    From Martin Alder,

    Hi all .. we at Wessex Water Authority (as it then was) did some work on bio-gas for transport in the late 70’s early 80’s – we compressed the cleaned bio-gas into cylinders and ran converted vans – freezing and silicate deposition were the main irritants as I recall .. I know things have moved on – but one of the key economic determinants was the efficiency of the gas clean up .. we were using a water scrubber and we lost 10%+ methane with the CO2 .. it did not matter on the scale we were operating at but it would have killed a commercial project ..

    The other question of course is that if the CO2 is extracted what happens to it – it is a GHG? .. I’m sure you have the answers so apologies in advance if I am covering old ground .. kind regards MA

  2. Reply

    Was wandering about the degree of gas scrubbing required, are there limits on CO2, siloxane, humidity etc?

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