| Penulis/Author |
Ir. Muhammad Agung Bramantya, S.T., MT., M.Eng., Ph.D., IPM., ASEAN Eng. (1) ; Ir. Hermawan, M.Si. (2) ; ANDRE FEBRIANTO (3); NUR KHOLIS MAJID (4) |
| Abstrak/Abstract |
The application of a diffuser in a wind turbine is used wind concentrating device. The purpose of this study is to know the effect of diffuser length to mechanical power generated by counter rotating wind turbine. In this study, two types of diffuser are compared i.e. diffuser with inlet nozzle and diffuser without inlet nozzle. Those diffusers have 20 cm, 40 cm and 60 cm length with 40 cm inlet diameter. The wind turbine has airfoil NACA 0012 cross section for both rotors. Diameter of front and rear rotor are 23 cm and 40 cm, respectively. The axial distance between two rotors is 14 cm This study conducted with wind speed variation of 4,29 m/s, 5,21 m/s and 6,1 m/s. The results showed that length of diffuser can affect the generated maximum total power. The enhancement is achieved up to 26% on a diffuser which has a 60 cm of length with a wind speed of 6,1 m/s. Addition of the Inlet Nozzle is also enhance the generated maximum total power. It can increase the generated maximum total power up to 43% at wind speed of 6,1 m/s. The maximum of power coefficient was achieved up to 0,105 using diffuser which has 60 cm-length with inlet nozzle at wind speed of 6,1 m/s. |
