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All Journal Eksergi: Jurnal Teknik Energi Jurnal Hilirisasi Technology kepada Masyarakat (SITECHMAS)
Anandia, Faranita Putri
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Chemical Engineering, Chemistry & Bioengineering Electrical & Electronics Engineering Energy Engineering Mechanical Engineering Social Sciences

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PENERAPAN TEKNOLOGI MESIN PENCACAH TONGKOL JAGUNG DAN MIXER UNTUK MENINGKATKAN PRODUKSI PUPUK ORGANIK PADA KELOMPOK TANI DESA JRAGUNG Sahid, Sahid; Utomo, Bagus Wahyu; Arrahman, Friendika Alif; Anandia, Faranita Putri; Maulidina, Fathiya Nur; Atthariq, Luthfi Aryananda
Jurnal Hilirisasi Technology kepada Masyarakat (SITECHMAS) Vol. 4 No. 2 (2023): Vol. 4 No. 2 Oktober 2023
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/sitechmas.v4i2.4977

Abstract

Kelompok Tani Nastiti merupakan kelompok tani yang terletak di Krajan RT.02 RW. 11 Desa Jragung, Kec.Karangawen, Kab.Demak dan telah berdiri sejak tahun 1999. Program kartu tani merupakan salah satu program pemerintah untuk meningkatkan kesejahteraan para petani dalam bidang pertanian. Program kartu tani memiliki tujuan agar bantuan subsidi pupuk benar- benar tepat sasaran. Pupuk Organik menjadi alternatif tepat dikarenakan penggunaan pupuk organik secara berkelanjutan dapat meningkatkan produktivitas dan mencegah degradasi tanah. Penggunaan pupuk kimia secara terus-menerus dapat membuat tanah mengeras dan kehilangan porositasnya. Maka dari itu pembuatan pupuk ini dengan memanfaatkan limbah pertanian pada desa Jragung sendiri yaitu tongkol jagung sebagai bahan dasarnya. Metode penelitian yang dilakukan yaitu sosialisasi, perencanaan, perakitan, penerapan teknologi, pendampingan, evaluasi, dan keberlanjutan program. Pupuk organik yang terbuat dari bahan dasar tongkol jagung ini lebih mudah dibuat dan harga bahan relative terjangkau. Penggunaan pupuk tongkol jagung ini juga tidak akan merusak unsur hara yang ada didalam tanah hal ini dikarenakan pupuk tongkol jagung menggunakan bahan-bahan organik yang baik untuk tanah. Setelah dilaksanakannya kegiatan sosialisasi dan pelatihan, Kelompok Tani Nastiti sudah bisa dalam menggunakan mesin pencacah dan alat mixer secara mandiri. Kelompok Tani Nastiti terampil dalam memanfaatkan limbah jagung yang dapat dimanfaatkan sebagai bahan dasar pembuatan pupuk.  
Experimental Study of the Performance of a Horizontal Axis Wind Turbine with A Flat Taper Type of 4:5 and an Outer Angle of 25° With Variations in The Number of Blades Anandia, Faranita Putri; Sahid, Sahid; Roihatin, Anis
Eksergi Vol. 21 No. 03 (2025): SEPTEMBER 2025
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v21i03.7110

Abstract

This experimental study investigates the performance of a Horizontal Axis Wind Turbine (HAWT) with a flat taper 4:5 blade design and a 25° exit angle, focusing on the effect of varying the number of blades (6, 9, and 12). The turbine, with a diameter of 1.1 m and blade dimensions of 470 mm length, 110 mm top width, and 137 mm bottom width, was tested at wind speeds of 3 m/s, 5 m/s, 7 m/s, and 9 m/s in a laboratory setting. Parameters such as wind speed, turbine rotation, voltage, and current were measured to analyze system efficiency. The results indicate that blade count and wind speed significantly influence efficiency. The highest efficiency of 12.51% was achieved at 3 m/s with 9 blades, while at 5 m/s, the efficiency peaked at 3.95% with 9 blades. For higher wind speeds (7 m/s and 9 m/s), the optimal efficiency decreased to 2.03% and 0.95%, respectively, both achieved with 6 blades. The study concludes that this turbine design is most effective at low wind speeds (≤5 m/s), making it suitable for regions with similar wind conditions, such as Indonesia. The findings contribute to optimizing blade configurations for small-scale wind energy applications.
Horizontal Axis Wind Turbine Efficiency Optimization Through Tip Radius Modification on 4:5 Flat Taper Blades Sahid, Sahid; Anandia, Faranita Putri; Wattimena, Christopher Johanes Edsel; Pratiwi, Okta Ayu; Tantri, Riris Annisa Tarra; Barid, Muhammad
Eksergi Vol. 21 No. 03 (2025): SEPTEMBER 2025
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v21i03.7112

Abstract

This study aims to investigate how changing the roundness of the back edge of blades affects a 4:5 flat taper wind turbine. Tests used blades with 5 mm, 10 mm, and 15 mm rounded edges, compared to a 5 mm notched blade, across wind speeds from 3 to 9 m/s. The results show the 5 mm rounded edge works best at low wind speeds, with an efficiency of 11.12% at 3 m/s. At higher wind velocities, the 15 mm rounded blade demonstrated superior aerodynamic performance, attaining an efficiency of 1.63% at 7 m/s. The rounded trailing edge improved aerodynamic behavior by minimizing turbulence and enhancing flow stability. Therefore, the optimal edge radius should be determined based on regional wind characteristics, especially for low-speed wind zones typical of Indonesia
Co-Authors Anis Roihatin Arrahman, Friendika Alif Atthariq, Luthfi Aryananda Barid, Muhammad Maulidina, Fathiya Nur Pratiwi, Okta Ayu Sahid Sahid Tantri, Riris Annisa Tarra Utomo, Bagus Wahyu Wattimena, Christopher Johanes Edsel