Pengujian Skala Laboratorium Performa Rotor Turbin Angin Ganda Kontra-Rotasi Melalui Variasi Rasio Geometri
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KOSTAN PAE(1)
PROGRAM STUDI TEKNIK MESIN
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Verdy A. Koehuan(2*)
Program Studi Teknik Mesin, Fakultas Sains dan Teknik Universitas Nusa Cendana
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Gurnawati Gurnawati(3)
Program Studi Teknik Mesin, Fakultas Sains dan Teknik Universitas Nusa Cendana
(*) Corresponding Author
Abstrak
Tujuan penelitian ini adalah untuk mengetahui performa turbin angin rotor ganda kontra rotasi (double rotor counter-rotation) terhadap konfigurasi rasio geometri rotor CRWT. Pengujian dilakukan pada skala laboratorium dengan model blade rotor turbin menggunakan seri airfoil S826 yang dikeluarkan oleh NREL (National Renewable Energy Laboratory), dimana diameter rotor pada skala lapangan (full scale) adalah 0,944 m. Blade dibuat melalui proses 3D printing menggunakan material PLA (polylactic acid) dengan profil airfoil S826. Pengujian skala laboratorium menggunakan terowongan angin dengan dimensi seksi uji panjang 0,6 m, lebar 0,3 m dan tinggi 0,3 m serta kecepatan angin dianggap seragam yang divariasikan mulai dari kecepatan 3 m/s hingga 5 m/s. peforma CRWT dengan rasio geometri rotor D1/D2 < 1 lebih baik dari CRWT dengan rasio geometri rotor D1/D2 > 1 pada jarak rotor Z/D1= 0,4. Variasi rasio geometri turbin dengan diameter rotor depan lebih kecil, koefisien daya turbin rotor depannya lebih tinggi dari turbin dengan diameter rotor depan lebih besar.
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