Article Per Year (5 Year)
p-Index From 2019 - 2024
0.444
P-Index
This Author published in this journals
All Journal Jurnal Teknik Mesin
Darwin Harun
Universitas Syiah Kuala
Mechanical Engineering

Published : 3 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 3 Documents
Search

 1 
Studi Eksperimental Pengaruh Variasi Jumlah Blade pada Turbin Angin Archimedes Spiral Darwin Harun; Muhammad Ilham Maulana; Riza Mirza
Jurnal Teknik Mesin Unsyiah Vol 6, No 2 (2018)
Publisher : Jurnal Teknik Mesin Unsyiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jtm.v6i2.18229

Abstract

Wind energy is one of the energy that is starting to be used to produce electricity or convert it to mechanical energy for other purposes. One of the tools used to harness wind energy is a wind turbine. Indonesia, especially Aceh, is one of the countries that has not used wind energy as a power plant because of the characteristics of wind in Indonesia which tends to be low-speed. Archimedes spiral wind turbine is a new type of wind turbine that can operate at low wind speeds, consisting of two to three Circular blades form an axis, then wrapped around each other and one side is extended, the design of this turbine essentially mimics the shell of the Nautilus snail (Biomimicry). The basic principle of this wind turbine is designed using the legal principle of Archimedes. This scientific work will analyze the effect of variations in the number of blades on rotation and the influence of blade rotation on wind speed using the experimental method, therefore turbines are made with variations of 2 blades and 3 blades, and the outer diameter is 80 cm and overall length is 90 cm. From the results of the study it was found that the 3 blade wind turbine has a better percentage of shaft rotation compared to the 2 blade wind turbine that is equal to 16.67%. Maximum wind power occurs on the 4th floor with a value of 164.3 watts
Peningkatan Kadar Dissolved Oxygen pada Area Tambak Mengggunakan Windmill Aerator Tipe Savonius 4 Blade Darwin Harun; Syarizal Fonna; Ika Wahyuni
Jurnal Teknik Mesin Unsyiah Vol 7, No 2 (2019)
Publisher : Jurnal Teknik Mesin Unsyiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jtm.v7i2.18233

Abstract

The aeration process is a method  to increase the dissolved oxygen levels in the water environment. In the pond area has a minimum requirement of dissolved oxygen content in the water so that fish can live and develop. The minimum value of dissolved oxygen in the pond area is 4 mg / l, but the higher the level of dissolved oxygen in the pond area, the better the results of the pond. Previous research conducted by Rizki was Analysis of the Potential of Wind Energy for Windmill Aerator Performance of ponds in Alue Kumba in East Aceh Regency, and the results of these studies showed that the wind energy in the Alue Kumba Village had the potential to operate windmill aerators. However, this study has not shown the results of the dissolved oxygen value of the windmill aerator system, therefore this study aims to obtain results and the area that can be reached by a diffuser. The method used is data collection of dissolved oxygen from the diffusser installation with a distance of 1.5 meters and data collection at 3 times, morning, afternoon and evening. Installation of windmill aerator in the morning produces dissolved oxygen value of 7.42 mg / l with a maximum distance of 18 meters, then in the afternoon the oxygen value of 6.23 mg / l with a maximum distance of 15 meters, and for the afternoon conditions the value of dissolved oxygen is 5.16 mg / l with a maximum distance of 16.5 meters. The dissolved oxygen value after the installation of the windmill aerator increased with an average increase of 1-2 mg / l at each measurement point with the highest dissolved oxygen highest value of 7.42 mg / l up from 5.52 mg / l with a maximum distance of 18 meters on the measurement morning. From the results of this study explain that this method can produce a good area of dispersed dissolved oxygen with an average distance of 16.5 meters with a minimum dissolved oxygen condition that is good for fish to develop in the area of the pond
Pengaruh Variasi Bentuk Plat Terhadap Performansi Solar Water Heater Darwin Harun; Muhammad Ilham Maulana; Teuku Syahrul; Masri Ibrahim
Jurnal Teknik Mesin Unsyiah Vol 8, No 1 (2020)
Publisher : Jurnal Teknik Mesin Unsyiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jtm.v8i1.18241

Abstract

Thermal energy is one form of energy that is very crucial for human being. It can be obtained through the sun, i.e, that is solar energy. Solar energy is used widely both in industry and houshold. One of the most important component of solar water heater is thermal energy collector or known as absorber. Solar collector is a device utilized to convert sun radiation to thermal energy. This research wanted to examine the effect of different shapes of collector. The methodolody used is by varying the shapes of plat plate, where plate A has a square shape and plate B has has isosceles shape. Collector dimension is 1.5x0.8 m with these two shapes constructed from stainless steel. Pipe used for fluid is made from copper with 1 in diameter and 1.4 m length. Thermal insolation is used from rubber to decrease heat loss from pipe. Plate B collector with isosceles shape showed the highest efficiency compared to plate A collector with square shape. The highest outlet fluid temperature from plate B is 670C with sun radiation 1198 W/m2. The highest useful energy is 209.91 Watt from plate B at 13.30 and efficiency is 16.23% at 13.00WIB.
Co-Authors Fonna, Syarizal Ika Wahyuni Masri Ibrahim Muhammad Ilham Maulana Riza Mirza Teuku Syahrul