COUNTER-ROTATING DUAL ROTOR WIND TURBINE LAYOUT OPTIMISATION
Keywords:CFD, CO-DRWT, optimisation, simulation, wind turbine.
General energy demand is continuously increasing, thus the energy generating assets need to be optimised for higher efficiency. Wind turbines are no exception. Their maximum efficiency can be determined on a theoretical basis. The limit is approached by researches day by day, utilizing the latest developments in airfoil design, blade structure and new and improved ideas in conventional and unconventional wind turbine layouts. In this paper, we are reviewing the conventional and unconventional wind turbines and their place in smart cities. Then, an unconventional wind turbine design, the CO-DRWT (counter-rotating dual rotor wind turbine) is analysed with a CFD (computational fluid dynamics) code, varying the axial and radial distances between the two turbines. After the simulations, the power coefficients for the different turbine configurations is calculated. At the end of this paper, the simulations results are summarized and consequences are drawn for the CO-DRWT layouts.
F. Szlivka, I. Molnár. Víz - és szélenergia hasznosítás, edutus foiskola kiadó. https: //regi.tankonyvtar.hu/hu/tartalom/tamop412A/ 2010-0017_10_viz_es_szelenergia/index.html,
BP Statistical Review of World Energy. https://www.bp.com/content/dam/bp/ business-sites/en/global/corporate/pdfs/ energy-economics/statistical-review/ bp-stats-review-2019-full-report.pdf, 2019.
Wind Turbine at North Pole. https://www. southpolestation.com/trivia/90s/drifted2.jpg. Accessed: 29 March 2020.
World Trade Center in Bahrain. http://www.alternative-energy-news.info/images/ pictures/wind-powered-towers.jpg. Accessed: 05 January 2020.
Renewables (em)power smart cities. Deloitte Insights. https://www2.deloitte.com/content/dam/insights/ us/articles/4971_Smart-renewable-cities/DI_ Smart-renewable-cities.pdf, 2019. Accessed: 30 March 2020.
Budapest 2024 Nonprofit Ltd. Smart Budapest – The Smart City Vision of Budapest. https://budapest.hu/Documents/Városépítési% 20Foosztály/Smart_Budapest_summary_ENG.pdf, 2017. Accessed: 29 March 2020.
L. Romanski, J. Bieniek, P. Komarnicki, et al. Estimation of operational parameters of the counterrotating wind turbine with artificial neural networks. Archives of Civil and Mechanical Engineering 17(4):1019 – 1028, 2017. doi:10.1016/j.acme.2017.04.010.
Unconventional wind turbines. http://www. whirlopedia.com/images/wind-turbines-elk.jpg. Accessed: 08 October 2019.
Bizarre wind turbines. https://cdn.trendhunterstatic.com/thumbs/ urban-wind- urbine.jpeg. Accessed: 08 October 2019.
A. Ozbay, W. Tian, H. Hu. Experimental Investigation on the Wake Characteristics and Aeromechanics of Dual-Rotor Wind Turbines. Journal of Engineering for Gas Turbines and Power 138(4), 2015. doi:10.1115/1.4031476.
E. Erturk, S. Sivrioglu, F. C. Bolat. Analysis model of a small scale counter-rotating dual rotor wind turbine with double rotational generator armature. International Journal of Renewable Energy Research 8(4):1849 – 1858, 2018.
E. Erturk, O. Gökçöl, S. Sivrioglu, F. Bolat. Modeling and analysis of a single shaft co-rotating dual rotor small wind turbine. International Journal of Mechanical Engineering and Technology 9(9):897 – 906, 2018.
N.-J. Lee, M. Inagaki, T. Kanemoto. Performance of counter-rotating tandem propellers at oblique flow conditions. In IOP Conference Series: Earth and Environmental Science, vol. 240, p. 052004. 2019. doi:10.1088/1755-1315/240/5/052004.
A. N. Gorban, A. M. Gorlov, V. M. Silantyev. Limits of the turbine efficiency for free fluid flow. Journal of Energy Resources Technology 123(4):311 – 317, 2001. doi:10.1115/1.1414137.
G. Kristóf. Áramlások numerikus modellezése, Akadémia Kiadó. https://mersz.hu/kristof-aramlasok-numerikus-modellezese. Accessed: 16 April 2020.
F. Szlivka, P. Kajtar, I. Molnár, G. Telekes. CFX simulations by twin wind turbine. In International Conference on Electrical and Control Engineering 2011, pp. 5780 – 5783. Yichang, China, 2011. doi:10.1109/ICECENG.2011.6057550.
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