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The development of an optimised rotor software design tool to improve performance of small horizontal axis wind turbinesNewey, Kerryn Brett January 2012 (has links)
Horizontal axis wind turbines are by far the most common and well understood forms of wind turbine. Typically a large amount of research and development has been invested in the technology of large scale wind turbines. Unfortunately, development of small machines (rotor diameter smaller than 10 metres) has not been as forthcoming. The advantages of small turbines are that they are accessible to the individual consumer and they are a very attractive project for the home builder. The disadvantage of small turbines is that due to the negative influence of economies of scale, they tend to be costly in relation to their power output and suffer from a long-term return on investment. Furthermore, trends in the wind industry have shown that smaller machines tend to be relatively simple devices that have been developed with very little research and development. As a result, small turbines can be inefficient, unreliable and expensive to maintain. In many cases rotor design is less than optimal, with very little blade refinement. This is especially critical for small rotors due to low Reynolds Number operation. Further exacerbating the problem is that the rotors are typically not well matched to the generator. In many cases the machines are not suited to the wind speed range in which they are designed to operate, reducing the financial viability due to poor performance. It is envisaged that by applying optimising techniques and automating some of the design complexities into a software design tool, more cost-effective and viable machines can be developed that will deliver improved performance and therefore become more financially viable.
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The effect of endwall manufacturing variations on turbine performanceGrewe, Robert Peter January 2014 (has links)
No description available.
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A simulation-based procedure for reliability anaylsis of wind turbinesSaranyasoontorn, Korn 28 August 2008 (has links)
Not available / text
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Design of a combustion chamber for an experimental gas turbineLyczko, Felix Joseph 12 1900 (has links)
No description available.
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Development of the control and automation system for mini hydro turbinesSchmutz, Werner Frederich January 1995 (has links)
Thesis (MTech(Electrical Engineering))--Cape Technikon, Cape Town,1995 / This thesis describes the research, development and design of one of the
most modern generic control and automation system for mini Hydro turbines
available in the world.
Special emphasis is placed on the Man machine interface. A concept of total
dynamic plant and data status representation was pursued. To achieve this,
a large amount of graphical animation was incorporated into the design.
The end product was to be the most economical and cost effective
implementable design available , yet providing the most modern functions
and features available in the world market.
The system was developed and researched to be generic and applicable to
any small Hydro plant. The design can thus be implemented on any suitable
PLC and SCADA system and is not dependant on any specific manufactures
hardware or software. The main emphasis is laid on functional capability of
the design.
Utilising this design standard would virtually cut the cost of engineering
associated with the design of a Hydro control system by 90%. The design
and engineering costs related to a Hydro automation project could typically
exceed R 100 000 a for small Hydro plant as this scheme.
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Design optimization of a micro wind turbine using computational fluid dynamicsDeng, Yun, 鄧昀 January 2008 (has links)
published_or_final_version / Mechanical Engineering / Master / Master of Philosophy
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Design of small water turbines for farms and small communities.Durali, Mohammad January 1976 (has links)
Thesis. 1976. M.S.--Massachusetts Institute of Technology. Dept. of Mechanical Engineering. / Microfiche copy available in Archives and Engineering. / Bibliography: leaf 149. / M.S.
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Maximization of energy capture of passive, variable-speed wind-turbineKinjo, Fuminao 29 April 2003 (has links)
This thesis presents and examines the concept that the output of a wound-rotor
induction generator (WRIG) can be limited by means of linking to external
impedances for wind-turbine generating system application.
An 80kW-WRIG is simulated as a model to examine the control of the output
power vs. speed characteristic. Model of WRIG derived from per phase equivalent
circuit is organized, then it is estimated how much external impedances affect the
characteristic of output power for it to approach to a typical wind-turbine curve.
Practical tests are performed using 80kW-WRIG in testing lab to validate the
simulation data. In addition, a smaller WRIG, connected on same shaft as 80kW-WRIG,
is designed to extend the range of wind speed. Also external impedances with
smaller WRIG are chosen to extract optimum power from wind-turbine.
Finally, passively controlled tandem WRIGs are shown to have the capability
to optimize wind-turbine energy extraction when controlled entirely by external
impedances. / Graduation date: 2003
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Multi-flexible-body analysis for applications to wind turbine control designLee, Donghoon 01 December 2003 (has links)
No description available.
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Thermodynamic considerations in devising on external combustion gas turbine engine refuse incineratorCraig, Gale M. 03 June 2011 (has links)
Study and experiment indicate that, with existing technology, a modified open Brayton cycle can be used to burn common municipal refuse at atmospheric pressure and produce useful power while scrubbing the combustion product gases to remove pollutants.The hot combustion gases pass from a combustor through a turbine to a region below atmospheric pressure where they are scrubbed and cooled by mixing with water spray. The water spray and gas mixture is then exhausted to atmospheric pressure through a compressor.Although current compressor designs are workable in this application, a new design is needed which will have reduced water drag power loss.Ball State UniversityMuncie, IN 47306
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