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.
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