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A platform for research: civil engineering, architecture and urbanism
Mažosios vėjo elektrinės galios kreivės ir efektyvumo tyrimas ; Research of small scale wind turbine power curve and efficiency
Increasing popularity of renewable energy technologies leads to increasing relevance of applied research intended to evaluate real technical characteristics of energy generating equipment. In this study investigation of small scale wind turbine power curve and efficiency is presented. Literature review provides overview of wind flow generation, influence of the obstacles and terrain, global trends in the market of small wind turbines, definition of small scale wind turbines, analyzes structural types and components, as well as wind turbines’ efficiency theoretical fundamentals and most common options of wind turbine integration into grid. Experimental wind speed and wind turbine power measurements under real operating conditions were made with special equipment. Also small scale wind turbines technical parameters were analyzed in order to determine technical–economical efficiency evaluation criteria. The investigation identified power curve and efficiency of small scale wind turbine “Vėjo fabrikas 4 kW”. Results of investigation revealed that average efficiency coefficient is 0,24, and maximal value of 0,34 is reached in wind speed range of 6 to 7 m/s. Efficiency coefficient dependence on a tip–speed ratio was also found, the maximum value was achieved at tip–speed ratio 2.78. The analysis of various small scale wind turbine models technical specifications was made and technical–economical efficiency coefficients were calculated in order to make objective comparison. Study showed that technical–economical efficiency of wind turbine “Vėjo fabrikas 4 kW” at wind speed of 4 m/s is 7,5 W2/EURm2 and at wind speed of 6 m/s – 30 W2/EURm2, and these values are among the best comparing to other investigated wind turbines. On the basis of data analysis and calculations the recommendations were suggested for further studies of similar format. It is recommended to use shorter intervals of instantaneous measuring data recording for studying rotor response to wind speed fluctuations. For more accurate investigation of wind turbine power curve, it is recommended to use average value of specific time range of measuring.
Mažosios vėjo elektrinės galios kreivės ir efektyvumo tyrimas ; Research of small scale wind turbine power curve and efficiency
Increasing popularity of renewable energy technologies leads to increasing relevance of applied research intended to evaluate real technical characteristics of energy generating equipment. In this study investigation of small scale wind turbine power curve and efficiency is presented. Literature review provides overview of wind flow generation, influence of the obstacles and terrain, global trends in the market of small wind turbines, definition of small scale wind turbines, analyzes structural types and components, as well as wind turbines’ efficiency theoretical fundamentals and most common options of wind turbine integration into grid. Experimental wind speed and wind turbine power measurements under real operating conditions were made with special equipment. Also small scale wind turbines technical parameters were analyzed in order to determine technical–economical efficiency evaluation criteria. The investigation identified power curve and efficiency of small scale wind turbine “Vėjo fabrikas 4 kW”. Results of investigation revealed that average efficiency coefficient is 0,24, and maximal value of 0,34 is reached in wind speed range of 6 to 7 m/s. Efficiency coefficient dependence on a tip–speed ratio was also found, the maximum value was achieved at tip–speed ratio 2.78. The analysis of various small scale wind turbine models technical specifications was made and technical–economical efficiency coefficients were calculated in order to make objective comparison. Study showed that technical–economical efficiency of wind turbine “Vėjo fabrikas 4 kW” at wind speed of 4 m/s is 7,5 W2/EURm2 and at wind speed of 6 m/s – 30 W2/EURm2, and these values are among the best comparing to other investigated wind turbines. On the basis of data analysis and calculations the recommendations were suggested for further studies of similar format. It is recommended to use shorter intervals of instantaneous measuring data recording for studying rotor response to wind speed fluctuations. For more accurate investigation of wind turbine power curve, it is recommended to use average value of specific time range of measuring.
Mažosios vėjo elektrinės galios kreivės ir efektyvumo tyrimas ; Research of small scale wind turbine power curve and efficiency
Juodsnukis, Romutis (author) / Marčiukaitis, Mantas
2015-01-15
Theses
Electronic Resource
Lithuanian , English