NOx reduction
All our Trent engines use the Group's 'Phase 5' combustor technology. Through detailed design optimisation, we have steadily reduced NOx emissions on every new engine. The Trent 900 has the lowest certificated NOx level of any large engine and we expect to improve on this with the new Trent 1000.
In our Research and Technology programme, we are developing a new ultra-low NOx, 'lean burn' combustor which will be tested in the EFE programme and made available for our next generation of gas turbines. With these innovations, we are on track to meet the ACARE 2020 goal.
The ACARE NOx target is interpreted with reference to total NOx emissions produced over the flight. Improvements in engine emissions technology are expected to deliver three quarters of the 80 per cent target, with the balance coming from reductions in overall fuel-burn as a result of improved efficiencies in engine, airframe and operations.
Progress towards reaching the ACARE goals
