Alstom Gas Turbine Technology Developments

2013 ◽  
Author(s):  
Caroline Marchmont ◽  
Stefan Florjancic ◽  
Wolfgang Kappis
Keyword(s):  
Research And Development ◽  
Gas Turbine ◽  
New Technologies ◽  
Technology Development ◽  
State Of The Art ◽  
Fuel Composition ◽  
Combined Cycles ◽  
Effective Part ◽  
And Performance ◽  
Emission And Performance

In preparation for the next generation combined cycles, gas turbine technology development needs to continue to lower the lifecycle costs through increased efficiency, reduced first costs, extended maintenance cycles, and reduced emissions. It must also develop fast ramping capability, account for a wider variation in fuel composition and provide emission and performance effective part load operation. These needs will be met by refining state of the art technologies and adding new technologies. This paper will provide an overview of the recent research and development activities, the approach to bring them into a product and the resulting trend in Alstom gas turbine technologies.

Alstom Gas Turbine Technology Trends

2012 ◽  
Author(s):  
Caroline Marchmont ◽  
Stefan Florjancic
Keyword(s):  
Gas Turbine ◽  
Power Plants ◽  
New Technologies ◽  
Technology Development ◽  
State Of The Art ◽  
Combined Cycle ◽  
Fuel Composition ◽  
Renewable Sources ◽  
Combined Cycles ◽  
Effective Part

The power generation mix is in transition with more and more electricity generated by renewable sources. Combined cycle power plants will have to partner with renewable sources and compensate for their fluctuating nature. In preparation for the next generation combined cycles, gas turbine technology development needs to continue to lower the lifecycle costs through increased efficiency, extended maintenance cycles, and reduced emissions. It must now also develop fast ramping capability, account for a wider variation in fuel composition and provide an emission effective part load operation. These needs will be met by refining state of the art technologies and by adding new technologies. This paper provides an overview of the research and development activities and resulting trend in Alstom gas turbine technologies.

scholarly journals High-Performance Emerging Solid-State Memory Technologies

MRS Bulletin ◽  
2004 ◽  
Vol 29 (11) ◽  
pp. 805-813 ◽  
Author(s):  
Herb Goronkin ◽  
Yang Yang
Keyword(s):  
Solid State ◽  
Research And Development ◽  
High Performance ◽  
New Technologies ◽  
State Of The Art ◽  
Electronic Equipment ◽  
Private Industry ◽  
Development Stages ◽  
The World ◽  
And Storage

AbstractThis article introduces the November 2004 issue of MRS Bulletin on the state of the art in solid-state memory and storage technologies.The memory business drives hundreds of billions of dollars in sales of electronic equipment per year. The incentive for continuing on the historical track outlined by Moore's law is huge, and this challenge is driving considerable investment from governments around the world as well as in private industry and universities. The problem is this: recognizing that current approaches to semiconductor-based memory are limited, what new technologies can be introduced to continue or even accelerate the pace of complexity? The articles in this issue highlight several commercially available memories, as well as memory technologies that are still in the research and development stages. What will become apparent to the reader is the huge diversity of approaches to this problem.

scholarly journals First Movers in Molecular Detection: Case Comparison on Harnessing Research and Development, Industry, and Entrepreneurship

2021 ◽  
Vol 8 ◽  
Author(s):  
Kenneth B. Yeh ◽  
Matt Scullion ◽  
Julia M. Michelotti ◽  
Gene Olinger
Keyword(s):  
Research And Development ◽  
Corporate Culture ◽  
Molecular Detection ◽  
New Technologies ◽  
Technology Development ◽  
Panel Discussion ◽  
Lessons Learned ◽  
Nucleic Acid Detection ◽  
Health Security ◽  
First Mover

The current unprecedented COVID-19 pandemic underscores the importance of diagnostic assays in health security preparedness and readiness. Advancing new technologies for rapid molecular detection of high consequence infectious pathogens is an ongoing challenge that requires ingenuity and vision. Sustainment of a robust supply chain for materials and the logistics of timely product delivery further challenge diagnostic kit and device manufacturers. Business economists often characterize technology companies that discover unique breakthroughs in their field and are first to bring related products to market as first movers. From a market perspective, three first mover characteristics include: having the knowledge and capability to address a unique breakthrough, excellent technological leadership, and the ability to capitalize on the opportunity. Current mainstays for molecular detection include using Taq DNA Polymerase enzyme and fluorescent chemistry for quantitative PCR (qPCR). A newer and promising technology uses CRISPR-Cas proteins for nucleic acid detection. Our panel discussion from the 2020 ASM Biothreats conference, which included members from two prototypical first mover companies, explored their respective corporate experiences. Both companies were selected for the discussion based on their revolutionary innovations and similarities in their research and development, corporate culture and trajectory. One company, established over 20 years ago, became a market leader in the biothreat detection market by advancing air thermocycling qPCR across multiple product families. The second company is a rapidly growing start-up and a scientific pioneer in establishing next generation CRISPR technologies. Here we discuss their technology development, product deployment, and customer markets to draw lessons learned for researchers, end users, and funders.

Teaching Gas Turbine Technology to Undergraduate Students in Sweden

2018 ◽  
Author(s):  
Ioanna Aslanidou ◽  
Valentina Zaccaria ◽  
Evangelia Pontika ◽  
Nathan Zimmerman ◽  
Anestis I. Kalfas ◽  
...  
Keyword(s):  
Gas Turbine ◽  
Undergraduate Students ◽  
Gas Turbines ◽  
Engine Performance ◽  
Academic Education ◽  
Course Structure ◽  
Hybrid Energy ◽  
Combined Cycles ◽  
And Performance ◽  
Turbine Design

This paper addresses the teaching of gas turbine technology in a third-year undergraduate course in Sweden and the challenges encountered. The improvements noted in the reaction of the students and the achievement of the learning outcomes is discussed. The course, aimed at students with a broad academic education on energy, is focused on gas turbines, covering topics from cycle studies and performance calculations to detailed design of turbomachinery components. It also includes economic aspects during the operation of heat and power generation systems and addresses combined cycles as well as hybrid energy systems with fuel cells. The course structure comprises lectures from academics and industrial experts, study visits, and a comprehensive assignment. With the inclusion of all of these aspects in the course, the students find it rewarding despite the significant challenges encountered. An important contribution to the education of the students is giving them the chance, stimulation, and support to complete an assignment on gas turbine design. Particular attention is given on striking a balance between helping them find the solution to the design problem and encouraging them to think on their own. Feedback received from the students highlighted some of the challenges and has given directions for improvements in the structure of the course, particularly with regards to the course assignment. This year, an application developed for a mobile phone in the Aristotle University of Thessaloniki for the calculation of engine performance will be introduced in the course. The app will have a supporting role during discussions and presentations in the classroom and help the students better understand gas turbine operation. This is also expected to reduce the workload of the students for the assignment and spike their interest.

scholarly journals Thermodynamics and Performance Projections for Intercooled/Reheat/Recuperated Gas Turbine Systems

1987 ◽  
Author(s):  
Maher A. El-Masri
Keyword(s):  
Gas Turbine ◽  
High Performance ◽  
High Efficiency ◽  
Pure Water ◽  
Water Injection ◽  
Component Technology ◽  
Specific Power ◽  
Combined Cycles ◽  
And Performance ◽  
Marine Applications

Intercooled/Recuperated gas turbine systems provide high-efficiency and power density for naval propulsion. Current aero-derivative systems are capable of about 43% thermal efficiency in this configuration. With continued progress in gas-turbine materials and cooling technology, the possibility of further improving system performance by incorporation of gas-turbine reheat arises. A preliminary scan of this class of cycles is presented and compared with non-reheat intercooled/recuperated cycles at two levels of component technology. For conservative component technology, the reheat is found to provide very modest performance advantages. With advanced components and ceramic thermal barrier coatings, the reheat is found to offer potential for specific power improvements of up to 33% and for modest efficiency gains, on the order of one percentage point, while enabling turbine inlet temperatures well below those for the most efficient non-reheat cycles. The high-performance reheat systems, however, require reheat-combustor inlet temperatures beyond current practice. The use of water-injection in the intercooler, together with an aftercooler and a water-injected evaporative-recuperator is found to produce very large gains in efficiency as well as specific power. This modification may be feasible for land-based systems, where it can compete favourably with combined cycles. Despite the difficulty of obtaining pure water for a shipboard propulsion system, those large gains may justify further studies of this system and of means to provide its water supply in marine applications.

scholarly journals Gas Turbine Compressor Washing State of the Art — Field Experiences

1998 ◽  
Author(s):  
Jean-Pierre Stalder
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Technology Development ◽  
State Of The Art ◽  
Field Tests ◽  
Atmospheric Conditions ◽  
Maintenance Program ◽  
On Line ◽  
Gas Turbine Compressor

Technology development in gas turbine compressor washing over the last 10 years and today’s state of the art technology is presented in this paper. Based on various long term field tests and observations, correlation between rate of power degradation and atmospheric conditions can be established. Questions about compressor on line washing with water alone against the use of detergents, as well as washing frequencies are also addressed in this paper. Performance degradation behavior between gas turbines of different sizes and models can be explained with an index of sensitivity to fouling. The implementation of an optimised regime, of on line and off line washing in the preventive turbine maintenance program is important, it will improve the plant profitability by reducing the costs of energy production and contribute to a cleaner environment.

scholarly journals Expanding Expertise With State-of-the-Art Monitoring

1989 ◽  
Author(s):  
George F. Gramatikas ◽  
Daniel L. Davis
Keyword(s):  
Performance Evaluation ◽  
Gas Turbine ◽  
Health Monitoring ◽  
Gas Turbines ◽  
Performance Enhancement ◽  
State Of The Art ◽  
Plant Performance ◽  
Skilled Personnel ◽  
On Line ◽  
And Performance

This paper describes a program that groups gas turbines from one or more sites for the purpose of efficient monitoring and performance evaluation. Cost-improved gas turbine and power plant operation is achieved by a new, unified-yet-flexible service approach which combines state-of-the-art microprocessor-based monitoring with routine and emergency evaluation by a core of highly skilled personnel many miles from the operating site. This unique approach delivers expertise which supplements the gas turbine owner’s in-house resources. It is based on a modular concept of condition health monitoring and performance evaluation, including scheduled as well as on-line services. Portable condition health monitoring equipment provides the capability for scheduled plant performance evaluation by service engineers without investment in additional equipment. On-line monitoring includes a PC-based software system and a computer link to the service engineer’s headquarters. Both scheduled and on-line monitoring services include trend evaluation, projected maintenance requirements, maintenance planning assistance and suggestions for performance enhancement.

Using Hydrogen as Gas Turbine Fuel: Premixed Versus Diffusive Flame Combustors

2014 ◽  
Vol 136 (5) ◽  
Author(s):  
Matteo Gazzani ◽  
Paolo Chiesa ◽  
Emanuele Martelli ◽  
Stefano Sigali ◽  
Iarno Brunetti
Keyword(s):  
Gas Turbine ◽  
State Of The Art ◽  
Combined Cycle ◽  
Efficiency Gain ◽  
Degradation Mechanisms ◽  
Lean Premixed Combustion ◽  
Pressure Drops ◽  
Lean Premixed ◽  
Combined Cycles ◽  
Cycle Efficiency

This work aims at estimating the efficiency gain resulting from using lean premixed combustors in hydrogen-fired combined cycles with respect to diffusive flame combustors with significant inert dilution to limit NOx emissions. The analysis is carried out by considering a hydrogen-fired, specifically tailored gas turbine whose features are representative of a state-of-the-art natural gas–fired F-class gas turbine. The comparison between diffusion flame and lean premixed combustion is carried out considering nitrogen and steam as diluents, as well as different stoichiometric flame temperatures and pressure drops. Results show that the adoption of lean premixed combustors allows us to significantly reduce the efficiency decay resulting from inert dilution. Combined cycle efficiency slightly reduces from 58.5%–57.9% when combustor pressure drops vary in the range 3%–10%. Such efficiency values are comparatively higher than those achieved by diffusive flame combustor with inert dilution. Finally, the study investigated the effects of decreasing the maximum operating blade temperature so as to cope with possible degradation mechanisms induced by hydrogen combustion.

The influence of effective research and development on the aero engine business

1969 ◽  
Vol 312 (1510) ◽  
pp. 333-347 ◽  
Keyword(s):  
Research And Development ◽  
Gas Turbine ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
Capital Equipment ◽  
Aero Engine ◽  
And Performance

The aero engine business is a good example of the growing number of industries whose survival and success depend on their ability to make a success of research. Today’s gas turbine engines are items of capital equipment whose characteristics and performance exert a high leverage on the benefits which its users can achieve. This is because these characteristics critically affect the size and type of aircraft required to perform a particular task. The engine therefore indirectly affects the aircraft price, its drag and the thrust level for which the engine itself has to be sized to match the aircraft’s needs, while its reliability influences the aircraft’s utilization.

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