alternativeАльтернативная энергетика и экология (ISJAEE)Alternative Energy and Ecology (ISJAEE)1608-8298Международный издательский дом научной периодики "Спейс10.15518/isjaee.2018.25-30.025-033alternative-1502Research ArticleВОЗОБНОВЛЯЕМАЯ ЭНЕРГЕТИКАRENEWABLE ENERGYО ВОЗМОЖНОСТИ ИСПОЛЬЗОВАНИЯ ВЕТРОАГРЕГАТОВ С СООСНЫМИ ВЕТРОТУРБИНАМИ В СИСТЕМАХ ЭНЕРГООБЕСПЕЧЕНИЯON POTENTIAL OF USING WIND TURBINES WITH COAXIAL WIND ROTORS FOR AUTONOMOUS POWER SUPPLYhttps://orcid.org/0000-0003-3525-4804КнышЛ. И.KnyshL. I.

Людмила Ивановна Кныш - доктор. технических наук, профессор, заведующая кафедрой аэрогидромеханики и энергомассопереноса

д. 72, пр. Гагарина, Днепр, 49010

Liudmyla Knysh - D.Sc. in Engineering, Professor, Chair of the Department of Aerohydromechanics and Energy&Mass Transfer

72 Gagarin Av., Dnipro, 49010

lknysh@ukr.netДнепровский национальный университет имени Олеся ГончараУкраинаOles Gonchar Dnepropetrovsk National UniversityUkraine201806122018025-302533Copyright © Международный издательский дом научной периодики "Спейс, 20182018Международный издательский дом научной периодики "СпейсМеждународный издательский дом научной периодики "Спейсhttps://www.isjaee.com/jour/about/submissions#copyrightNoticehttps://www.isjaee.com/jour/article/view/1502

The paper presents the experimental research results for the horizontal-axis wind turbine with coaxial wind rotors. It is assumed that such coaxial layout of the wind turbine can be used for designing of the wind energy systems with relatively low capacity and limited location area since the coaxial systems have advantages in overall dimensions and maximum using of the swept area. Possibility of coaxial horizontal-axis wind turbines usage is determined by positive or negative effect of turbines on each other. Literature review shows that closely spaced wind turbines can generally improve flow characteristics under certain conditions and consequently increase wind energy system efficiency. We have carried out the experiments in T-5 wind tunnel with two coaxial model two-bladed wind turbines which rotate in opposite directions. The generator of the first turbine and first turbine itself are located on the same shaft in the test section of wind tunnel. The second generator is in a lower compartment of the experimental setup and is connected by the transmission. We have measured the dynamic, energy and frequency characteristics of wind energy systems based on created experimental setup. A Pitot tube and automatic metering devises have measured the dynamic parameters and energy performance respectively. A frequency counter has saved all of the data obtained with the laser frequency measurement technique. The experiment has some specific technical features so the data received need to be corrected. The coaxial wind turbine power has decreased in comparison to isolated wind turbine at low wind speed. The return flows reinforce turbulence so wind speed falls. If wind speed increases, the impact of the return flows decreases, the coaxial wind turbine capacity significantly grows and exceeds isolated turbine capacity. The possibility of using wind turbines with coaxial wind rotors for autonomous power supply is shown. Such wind turbines are perspective and require more detailed analysis.

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The authors declare that there are no conflicts of interest present.