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A vertical-axis rotor as the adjusting system of a horizontal axis wind turbine

Augustyn Marcin

Technical Transactions

2020

Vol. 117, iss. 1

art. no. e2020009

The proposed self-adjusting mechanism consists of a carousel rotor with a vertical axis consisting of two kinematically connected flat blades. The torque of this rotor can change the position of the directing unit and additionally the position of the main propeller in order to direct the wind stream or save the main rotor when the wind is too strong. The theory, principles of operation, and the properties of the self-adjusting system were illustrated by formulas and graphs. Based on research conducted in a boundary layer wind tunnel, the values of the aerodynamic coefficients of the flat blades were determined, and then the power and propeller torque of the rotor were found as a function of the angle of wind attack. Acomputational procedure provides kinematical and force relations as well as the resulting torque diagrams of the rotor. An example of the use and the design structure of a self adjusting unit in the case of a horizontal axis wind turbine is presented.

W artykule zaprezentowano nowatorskie rozwiązanie zespołu samonaprowadzania na kierunek wiatru turbiny wiatrowej o poziomej osi obrotu, składające się z dwułopatowego, karuzelowego wirnika o pionowej osi obrotu i dwupozycyjnego mechanizmu nastawczego. Na podstawie przeprowadzonych badań w tunelu aerodynamicznym wyznaczono wartości współczynników aerodynamicznych łopaty płaskiej wirnika dwułopatowego turbiny naprowadzającej, a ich wartości zobrazowano na wykresach. Przedstawiono procedurę obliczeniową mocy oraz momentu napędowego wirnika zespołu samonaprowadzania w zależności od kąta działania wiatru. Wyniki obliczeń pokazano na wykresach. Zaprezentowano budowę i zasadę działania turbiny naprowadzającej, a także propozycję wykorzystania jej jako zespołu samonaprowadzania na kierunek wiatru z jednoczesnym zabezpieczeniem wirnika głównego HAWT przed nadmiernymi obrotami przy silnym wietrze.

Local benefits factored in utility scale wind energy for a remote location

Soliman Mohamed Hassan, Nesser Bassel I., Pytel Krzysztof

New Trends in Production Engineering

2019

Vol. 2, Iss. 1

549--554

The publication presents the results of analysis of possible local benefits factored in utility scale wind energy for a remote location. Electricity is one of the most vital problems on the Earth, thus utility scale wind and solar energy devices are boosting economic development. Energy demand is constantly increasing, despite efforts to ensure the energy efficiency of devices. People are looking for more energy and electricity to consume. Although wind energy is still being researched and improved, modern generation of wind energy is becoming more and more effective and desirable. This publication presents an effective solution to this issue. It deals with the generation of green environment friendly electricity from wind turbine. The genuine idea is to provide energy for remote location using onshore wind turbines. An analysis of the demand for energy at a remote location and electricity consumption was made to provide preliminary calculations of the wind farm. The number of required turbines is determined taking into account all related factors. A specific wind turbine has been selected and proposed to provide the necessary location with the necessary amount of energy. The analysis carried out showed that the produced energy is environment friendly since there is no carbon dioxide emission.