The impact of a wind concentrator system on the efficiency of roof-mounted wind turbines in rural areas

Year 2025, Volume: 14 Issue: 4, 1211 - 1221, 15.10.2025

Zeynep Aytaç , Halis Deviren

Abstract

Wind energy is a crucial pathway for sustainable electricity generation. Nevertheless, the performance of small-scale wind turbines-particularly in urban and rural environments- remains constrained by low and highly variable wind speeds. This study presents a novel wind concentrator system specifically developed to improve the performance of roof-mounted wind turbines by optimizing airflow characteristics. The system utilizes concave concentrator blades positioned circumferentially around the rotor to accelerate the incoming airflow and generate a controlled vortex, thereby increasing the wind velocity incident on the turbine. Experimental and theoretical analyses indicate that the concentrator increases the turbine rotational speed by approximately 39%, thereby enabling the turbine to operate at lower wind speeds that would otherwise result in stalling. Power coefficient measurements indicate an increase from 0.15 without the concentrator to 0.20 with the concentrator, representing approximately a one-third enhancement in power output at a wind speed of 9.5 m/s. Moreover, the concentrator facilitates comparable energy capture using only one-sixth of the rotor area required by a conventional wind turbine. These findings underscore the potential of the system to enhance the feasibility of small-scale wind energy, especially for decentralized and off-grid applications, thereby contributing to the development of distributed renewable energy solutions.

Keywords

wind energy , wind turbine efficiency , wind concentrator system , vortex dynamics , wind energy conversion systems (WECS)

Rüzgâr yoğunlaştırıcı sisteminin kırsal alanlardaki çatıya monte rüzgâr türbinlerinin verimliliğine etkisi

Abstract

Rüzgâr enerjisi, sürdürülebilir elektrik üretimi için temel bir yol olarak öne çıkmaktadır. Ancak, özellikle kentsel ve kırsal alanlarda kullanılan küçük ölçekli rüzgâr türbinlerinin performansı, genellikle düşük ve yüksek oranda değişken rüzgâr hızları nedeniyle sınırlı kalmaktadır. Bu çalışma, çatıya monte edilen rüzgâr türbinlerinin performansını hava akışı karakteristiklerini optimize ederek artırmak amacıyla özel olarak geliştirilmiş yenilikçi bir rüzgâr yoğunlaştırıcı sistemini sunmaktadır. Sistem, rotorun çevresine dairesel olarak yerleştirilen içbükey yoğunlaştırıcı kanatları kullanarak gelen hava akışını hızlandırmakta ve kontrollü bir girdap oluşturarak türbine ulaşan rüzgâr hızını artırmaktadır. Deneysel ve teorik analizler, yoğunlaştırıcı sistemin türbin dönme hızını yaklaşık %39 oranında artırdığını ve böylece, aksi halde durmasına neden olacak düşük rüzgâr hızlarında da türbinin çalışmasını mümkün kıldığını göstermektedir. Güç katsayısı ölçümleri, yoğunlaştırıcı olmadan 0.15 olan değerin yoğunlaştırıcı ile 0.20'ye yükseldiğini ve bu durumun 9.5 m/s rüzgâr hızında yaklaşık üçte bir oranında güç artışına karşılık geldiğini göstermektedir. Ayrıca, yoğunlaştırıcı sistem, konvansiyonel bir rüzgâr türbininin ihtiyaç duyduğu rotor alanının yalnızca altıda biriyle benzer düzeyde enerji üretimini mümkün kılmaktadır. Bu bulgular, sistemin özellikle merkezi olmayan ve şebekeden bağımsız uygulamalarda küçük ölçekli rüzgâr enerjisinin uygulanabilirliğini artırma potansiyelini vurgulamakta ve dağıtık yenilenebilir enerji çözümlerinin geliştirimine katkı sağlamaktadır.

Keywords

rüzgar enerjisi , rüzgar türbini verimliliği , rüzgar yoğunlaştırıcı sistemi , girdap dinamiği , rüzgar enerjisi dönüşüm sistemleri (WECS)

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