DEFLEKSI VERTIKAL POROS TURBIN ANGIN MULTI BLADE DI DAERAH PEDESAAN JENEPONTO - BAGIAN I: KAJI TEORITIK

The multi-blade wind turbine is a type of wind turbine that has been used by salt farmers in Paccelang Village, Jeneponto Regency, South Sulawesi Province. In operation, turbines often experience damage due to excessive vertical deflection of the shaft. This article examines and identifies the parameters that cause the vertical deflection of the shaft. The research was carried out theoretically and numerically. Theoretically, the research was carried out by entering the corresponding parameters into the described shaft vertical deflection equation. Numerically, the research was conducted using software inventor. In part I of this article only shows the results of theoretical studies. The parameters that cause excessive vertical deflection of the shaft and sorted by the magnitude of the contribution are reduction in shaft diameter, shaft elongation, and enlargement of external load

Penentuan Hubungan Antara Defleksi Lateral dan Radial Poros Baja Pada Berbagai Jenis Tumpuan Secara Teoritik

Defleksi lateral dan radial memiliki persamaan tersendiri karena selain memiliki arah defleksi yang berbeda juga memiliki turunan persamaan yang berbeda. Oleh karena itu perhitungan untuk kedua jenis defleksi ini masih dilakukan secara terpisah. Penelitian ini bertujuan untuk mengetahui hubungan antara defleksi radial dan lateral pada jenis tumpuan jepit-bebas, jepit-roll, dan jepit-jepit secara teoritik; sebuah hubungan yang memungkinkan penentuan defleksi lateral dan radial dilakukan secara bersamaan. Metode penentuan defleksi radial dan lateral serta hubungannya dilakukan berdasarkan kajian pada berbagai literatur. Hasil penelitan menunjukan bahwa adanya hubungan yang diperoleh antara defleksi radial dan lateral berupa beberapa persamaan. Konstanta Kotten ini memiliki nilai sebesar 1,93 untuk jenis tumpuan jepit-bebas, 35,39 untuk tumpuan jepit-roll, dan 61,93 untuk jenis tumpuan jepit-jepit.

KINERJA TURBIN ANGIN DARRIEUS DUA SUDU GERAK BERPROFIL NACA 0028 SECARA EKSPERIMEN

Wind energy is one type of renewable energy which is not only clean andenvironmentally friendly but also has abundant and is obtained free of charge in the natural. The process of converting kinetic energy in the wind into mechanical energy requires a turbine. Darrieus turbine is a device that converts wind energy that moves from various directions into mechanical energy on a shaft that moves in one direction. This study aims to determine the performance of a two-blade Darrieus turbine with the NACA 0028 profile experimentally. The wind tunnel, Darreus turbine, and load-bearing construction were designed and manufactured by researchers. Data collection of wind velocity, load, and rotation using standard equipment. The results of the study show that the turbine power coefficients are 35.57%, 23.55%, 23.2%, and 20.05% at wind velocity of 6.04, 7.08, 7.25, and 7.59 m/s, respectively

REKONTRUKSI BLADE TURBIN ANGIN DI DAERAH PEDESAAN JENEPONTO

The profile of the wind turbine blade used by salt farmers in Paccelang Village, Jeneponto Regency, South Sulewesi Province is rectangular shape, certain size, and made of wood. Although wood is easy to shape and can be found in the village, the blade size is too large which causes the blade to bend and break easily. In addition, the rectangular blade profile produces static characteristics that are not optimal. This article aims to review and recommend blade profile shapes with certain sizes according to the needs of salt farmers. The method used is numerical. The blade profiles in Paccelang Village, NACA 0010, and NACA 0020 blade profiles were formed to the appropriate size and assessed for their characteristics numerically. The results of the review recommend an applicable NACA 0010 blade profile

PENGARUH LETAK SALURAN UDARA SUPLAI EVAPORATOR TERHADAP DISTRIBUSI TEMPERATUR DAN KINERJA MESIN PENGKONDISIAN UDARA

Distribusi temperatur di dalam suatu ruangan pendingin sangat penting untuk diketahui dalam perencanaan mesin pengkondisian udara agar efektif menyerap panas dari ruangan. Pada penelitian eksperimen ini diteliti pengaruh letak suplai udara dingin ke dalam ruangan terhadap distribusi temperatur dan kinerja mesin pengkondisian udara. Hasil penelitian ini memberikan gambaran distribusi temperatur udara dalam ruangan serta arah pergerakan flida berdasarkan distribusi temperatur udara. Pada zona atas di mana suplai udara diletakkan, distribusi temperatur tergantung pada arah udara dingin yang kelur dari saluran suplai udara dingin. Sedangkan pada sona tengah terlihat gerakan udara akibat aliran udara ke arah sisi isap udara ke evaporator. Sedangkan pada zona bawah, terlihat udara relatif tidak bergerak. Kapasitas pendinginan udara dan COP maksimum dihasilkan oleh peletakan suplai udara dingin pada sudut ruangan sebesar 1.5738 kW dan 5.4945 sedangkan kapasitas pendinginan dan COP terendah diperoleh pada peletakan suplai udara dingin di dinding sebesar 1.2591 kW dan 5.4443