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Cost savings in the order of £130M over the REF period have been achieved by Rolls-Royce through the improvement of engine reliability of civil and military aero-engines, industrial machines used for electricity generation and gas/oil pumping applications through the use of techniques and processes developed by the Vibration University Technology Centre (UTC) at Imperial College London.
Work and tool temperature are major issues in abrasive machining. Cooling fluids, usually oil based, are used to control these temperatures. This research aimed to achieve much more effective use of coolant. The established industrial practice was to use very high volumes of oil, under very high pressures. This is an expensive and environmentally unfriendly approach. This research improved coolant flow quality by improving nozzle design and established the underlying physics to improve penetration of coolant into the cutting zone. It then went on to show that it was not only possible, but sometimes it may actually be beneficial, to dramatically reduce coolant flow volume by a factor of up to 20,000. Before industry would adopt these ideas it was necessary to have firm scientific evidence of their validity. This research by the General Engineering Research Institute (GERI) provided that foundation and has led to successful adoption by industry, which has in turn led to both economic and environmental impact. This case study will evidence industrial take-up via specific examples and shows that GERI's research in this area has had a global impact on the training of industrial engineers employing the grinding process.
Prof Zhao's development of an innovative hybrid engine RegenEBD was exploited by its industrial partner, Guangxi Yuchai Machinery Company (Yuchai), the largest bus engine manufacturer in China holding 80% of the domestic market. The first RegenEBD engine buses were operated in Yulin city, where Yuchai is based, in 2011. Yuchai confirmed that these buses have demonstrated notable fuel savings of 4.7-10% (1,100-2,200 litres of fuel saving), equivalent to 3.6-7.2 tonnes of carbon saving per vehicle per year. This led Yuchai to re-align their manufacturing strategies and development efforts for 3 years (2011-2013), investing significant resources to begin manufacturing and retrofitting of RegenEBD engines in 2014. They have employed over 30 new engineers to develop and manufacture RegenEBD and purchased equipment for RegenEBD engine testing and operations. Yuchai expects that hundreds of buses equipped with RegenEBD will be on the road by 2020.
Rotating machines are ubiquitous key elements for power generation. Research has led to impacts that have improved the design and performance of rotating machinery for component vendors, original equipment manufacturers and end-users:
(a) Siemens has adopted new designs of interstage turbine disc rim seals that reduce gas leakage paths and hence increase power efficiency/fuel savings in power based gas turbines. The impacts have protected 4-5 R&D jobs, improved seal product design, and enabled reallocation of corporate budgets.
(b) Integrated dynamic/thermal analysis has enabled preventive design against unstable shaft thermal bending, known as the Morton Effect in the field of turbomachinery.
(c) Research into the functionality of active magnetic bearings has been transferred into the standard ISO 14839 1-4 that has brought technology normalisation, involving changes to company design practices, to the field. Part 4 was published in 2012.
(d) An oil-free experimental facility has been delivered to GE Global Research (Munich) to aid in their compressor designs for subsea machines. GE has benefitted through knowledge transfer and the training of engineers for the design of new machines.
This impact is the improvement of aircraft engine efficiency by the application of profiled endwalls to turbine blades. The technology was researched by Durham University and exploited by Rolls-Royce by deploying the technology on airframes. Engines with profiled endwalls include the Trent 900 (A380 airframe), Trent 1000 (787 Airframe) and Trent XWB (A350 airframe). This (as of April 2013) totals around 2000 aircraft engine orders with profiled endwall technology applied. A saving of 1750 litres of fuel per flight from Zurich to Singapore was estimated when profiled endwalls are applied. This gives a 4400 kg reduction in carbon dioxide emissions for such a journey with a fuel cost saving of over $1100. In addition to the environmental benefit and the obvious cash savings for airlines an economic benefit for UK industry has arisen as Rolls-Royce is able to sell engines with a reduced fuel burn as well.
A unified design methodology for tuning gas turbine engine controllers, developed by researchers in the Department of Automatic Control and Systems Engineering (ACSE), is being used by Rolls- Royce across its latest fleet of Civil Aero Trent engines. Trent engines are used to power, for example, Boeing 787 Dreamliner and Airbus A350 aircraft that have been adopted by the world's leading airlines.
This new methodology has made economic impact through the introduction of a new process for tuning gas turbine engine controllers leading to the adoption of a significantly changed technology. Indicators of impact are:
i) a new control law and design practice, resulting in a unified approach for different projects;
ii) reduced development effort by shortening and simplifying the design exercise and rendering it suitable for modular insertion; and
iii) streamlined verification requirements.
Research into vibration damping has had a major economic and operational impact on Rolls- Royce resulting in a new design for [text removed for publication] engines used on [text removed for publication] wide body airliners. This has saved [text removed for publication] engine refit costs. The team has also designed a particle damper to reduce vibrations and significantly increase the life of the fuel system [text removed for publication].
Research in the University of Cambridge Department of Engineering (DoEng), which made it possible for the first time to design a 3D compressor blade as a single component, underpinned the design of compressors in Rolls-Royce civil aero engines. Blades designed using the research results yielded fuel efficiency improvements of 0.8% when deployed in Rolls-Royce Trent engines. The efficiency improvements in engines in service are estimated to have delivered savings of 460k tonnes in CO2 emissions and USD 145 million in fuel costs during the assessment period. Rolls- Royce's outstanding order book for engines in which the technology made a significant contribution to efficiency is estimated to be worth GBP 27 billion at list prices as at 31 July 2013; orders received during the assessment period are estimated to be worth GBP 18 billion at list prices.
This research project, carried out at the University of Derby, was used to develop an engine performance monitoring system and a data optimisation method for engine management systems for Land Rover. The project delivered two pieces of software developed for data modelling and optimisation with respect to the engine test bed. This has significantly reduced the engine test time on the test bed by up to 30%, reduced the cost of each engine test and provided optimum engine operation parameters to the Engine Control Unit (ECU), which has resulted in lower emissions and improved fuel economy. The project was started in 2000 and completed in 2008. However the outcomes of the research and developed software tools are still used by the Land Rover engine test group.
This case study relates to research supported under contract by Statoil AS, one of the world's largest oil and gas companies, and is focused on two major issues of significance to that industry, namely, the mathematical modelling and analysis of (a) hydraulic two-layer gas/liquid flow in pipe lines and (b) wax formation in the interior walls of pipe lines transporting heated oil. These projects arose out of contacts between senior research staff at the Statoil Research Centre and the Nonlinear Waves group in the School of Mathematics. The theoretical research undertaken was designed to complement the major experimental programmes developed at the Statoil Research Centre and was performed in collaboration with scientists there. The work has provided Statoil with a reliable theoretical framework to contextualise and enable comparison with experimental results and to inform the design of future experimental programmes. In the larger context, the research has played a key role in advancing the capability of Statoil to design and implement more economical, energy efficient, and environmentally safe strategies for gas/oil delivery via extended pipeline networks. Statoil have stated that the benefit of access to robust flow models in the North Sea context is rapidly approaching an economic value of many billions of Norwegian kroner.