Bowman Power Group Ltd has conducted emissions trials on a gas fuelled generator to investigate the effect of using its Electric Turbo Compounding (ETC) technology on unburnt hydrocarbon (UHC) emissions. Initial findings indicate a 25-50% reduction in UHC emissions, in addition to the previously proven benefits in respect of improved engine efficiency and reductions in CO2 emissions.
This was achieved by reducing the scavenging pressure in the engine cylinders, almost entirely eliminating fuel short circuiting and also reducing the release of non-combusted fuel. More information on the specifics of how this was achieved is available on request or directly at Bowman's website.
To achieve this level of reduction would typically require long research and development periods for ‘in-engine' solutions by an original equipment manufacturer, followed by intrusive and costly engine modification. Bowman's ETC system does away with this requirement, reducing costs and increasing the speed of upgrading the engine.
Emissions legislation ready
Reducing emissions continues to be the most significant element of the global climate change agenda, from the National Emission Ceilings Directive; to the Medium Combustion Plant Directive; the forthcoming TA Luft in Germany and other provisions on the horizon. The rise in the use of gas fuelled generators has led to a rise in UHC emissions, including methane which has a greenhouse gas effect 25-100 times that of CO2. This has led to the need for tighter UHC emissions regulations which are now on the horizon.
In anticipation of this legislation, and in line with their objective to making gas and diesel generators work more efficiently and environmentally, Bowman has continued to evolve its understanding of how its ETC technology interacts with the engines and generators it's installed on. The benefits of recovering waste heat energy from the exhaust gas and converting it to free, grid-quality electrical power are well understood, but the company is now well progressed with understanding this additional benefit of reduced emissions of harmful greenhouse gases.
With the flagship ETC 1000 system, end-users can still maintain the same power output using less fuel and producing fewer CO2 emissions, or produce additional power with improved fuel efficiency, and they can now do this knowing that the effect of operating their engines or generators on overall greenhouse gas emissions is much reduced.