Penentuan Parameter Weibull untuk Mendapatkan Densitas Daya Angin di Kawasan Blang Bintang Aceh Besar

Muliadi Muliadi, Teuku Murisal Asyadi

Abstract


Angin adalah salah satu sumber daya energi yang dapat dikonversikan untuk memenuhi kebutuhan energi listrik dalam mode on grid dan off grid. Pada daerah dengan karakteristik angin yang tepat, energi angin mungkin sudah dapat bersaing dengan pembangkit listrik lainnya, tetapi pada beberapa daerah yang tidak memiliki potensi angin yang cukup analisa kecepatan angin perlu dilakukan minimal satu tahun. Dalam penelitian ini, data kecepatan angin diperoleh dari BMKG Blang Bintang Aceh Besar. Selanjutnya semua data dianalisis dengan menggunakan metode numerik yang berbeda untuk mendapatkan parameter fungsi distribusi Weibull bentuk k dan skala c, kecepatan angin rata-rata (Vw), dan potensi energi atau densitas daya angina (Pw) di kawasan Blang Bintang Aceh Besar. Hasilnya, parameter Weibull yang dihitung dengan menggunakan metode empiris dan metode momen dapat menunjukkan hasil yang lebih baik daripada metode grafik. Nilai Vw dan Pw dengan menggunakan metode momen didapatkan masing-masing sebesar 4,60 m/s dan 76,154 Watt/m2. Nilai tersebut lebih besar bila dibandingkan dengan hasil dari menggunakan metode grafik dan empiris yaitu masing-masing Vw sebesar 4,24 m/s dan 4,59 m/s serta Pw sebesar 60,986 W/m2 dan 75,649 W/m2.


The wind is one of the convertible energy sources to meet the needs of electric energy in on-grid and off-grid modes. In areas with the right wind characteristics, wind energy may already be able to compete with other power plants, but in some areas that do not have sufficient wind potential, wind speed analysis needs to be carried out for at least one year. In this study, wind speed data were obtained from BMKG Blang Bintang Aceh Besar. Furthermore, all data were analyzed using different numerical methods to obtain the parameters of the Weibull distribution function of shape k and scale c, average wind speed (Vw), and potential energy or wind power density (Pw) in the Blang Bintang Aceh Besar area. As a result, the Weibull parameter calculated using the empirical method and the moment method can show better results than the graph method. The values of Vw and Pw using the moment method were obtained respectively 4.60 m/s and 76.154 Watt/m2. This value is greater when compared to the results using graphical and empirical methods, namely Vw of 4.24 m/s and 4.59 m/s, respectively, and Pw of 60.986 W/m2 and 75.649 W/m2.

 


Keywords


Parameter Weibull, Kecepatan Angin, Densitas Daya

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DOI: https://doi.org/10.37905/jjeee.v3i2.10385

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