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All Journal Jurnal Redoks JTTM: Jurnal Terapan Teknik Mesin Majalah Teknik Simes TEKNOSIA
Een Tonadi
Fakultas Teknik Universitas Prof.Dr. Hazairin,SH
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

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Rancang Bangun Mesin Parutan Kelapa Skala Rumah Tangga Dengan Kapasitas 10 kg/jam Roki Alianda; Muhammad Halil; Een Tonadi
MAJALAH TEKNIK SIMES Vol 16 No 2 (2022): Vol 16 No 2 (2022): Majalah Teknik Simes Volume 16 Nomor 2 Juli 2022
Publisher : UNIVERSITAS PROF. DR. HAZAIRIN, SH BENGKULU

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study aims to design, manufacture and test a coconut grated machine with a capacity of 10 kg/hour. The research method used in this research is an empirical method, namely field observations (observations) then from literature sources and then applied in one dimensional modeling with planning that is realized in one real form in the form of designing a coconut grating machine. This design is a coconut grater machine using 750 watts of electricity with pulley and belt transmission elements, with a grater system using a grater knife using a screw system. The results of the grater work obtained an average grater process of 36.72 Kg/hour. The advantages and disadvantages of designing the grated coconut machine that has been produced are very low noise levels and negligible vibration, because this machine is equipped with a pulley as a successor to the power of the electric motor. The increase in motor temperature for 2 hours to 4 hours of operation, there is no increase in motor temperature. The rotation of the grated head is quite good, it's just that the grated coconut with the shell is not clean, so the grating operation must be adjusted to the size of the coconut. The machine is easy to carry and safe to use.
ANALISIS PENGARUH JUMLAH SUDU TERHADAP EFISIENSI TURBIN PELTON DENGAN TEKANAN KONSTAN Een Tonadi
Teknosia Vol. 15 No. 1 (2021): Juni 2021
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/teknosia.v1i1.15390

Abstract

One of the renewable energy sources that can be used for electricity generation is the Pelton turbine. The purpose of this study was to determine the effect of the number of blades on the efficiency of a Pelton turbine with constant pressure. This research was conducted at the Unihaz mechanical engineering laboratory by varying the number of blades, namely 9 blade turbines and 12 blades. Tests were carried out by giving load gradually to the turbine until the turbine rotor rotation stopped rotating. The results show that in the turbine test with blades 9 the maximum rotation achieved is 698.2 rpm and the maximum rotor rotation is 714.5 rpm at blade 12. Likewise, the torque coefficient and power coefficient achieved by the turbine with 12 are greater when compared to the 9 blades. Meanwhile, the efficiency that can be achieved by turbines with 9 blades is 71% and at 12 blades is 79%. From this it can be concluded that the number of blades affects the rotation, torque coefficient, power coefficient and efficiency of the Pelton turbine with constant pressure.
Analisis Kekerasan Papan Komposit dari Serat Pelepah Pisang Dengan Resin Polyester Lelawati; Een Tonadi; Aan Sefentry
Jurnal Redoks Vol. 8 No. 2 (2023): REDOKS JULI-DESEMBER
Publisher : Universitass PGRI Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31851/redoks.v8i2.13614

Abstract

Tanaman Pisang banyak tumbuh di bagian dataran rendah dengan ketinggian 100 meter di atas permukaan laut, jenis tanah yang lembab dan berada pada wilayah terbuka. Bahan komposit adalah material rekayasa  yang tersusun dari dua atau lebih bahan utama yang dikombinasikan guna mendapatkan sifat mekanis (mechanical properties) yang lebih baik. Tujuan dari penelitian ini adalah untuk mengetahui nilai kekerasan material komposit dari bahan serat pelepah pisang dengan variasi resin dan jenis serat. Metode pengujian kekerasan menggunakan metode Rokcwell dengan 5 titik pengujian pada masing-masing spesimen. Spesimen terdiri dari 3 variasi yaitu papan komposit tanpa serat dengan resin 90% dan katalis 10%, serat pelepah pisang Panjang 95 mm sebanyak 70%, resin 20% dan katalis 10%, serbuk pelepah pisang 80%, resin 10% dan katalis 10%. Hasil penelitian ini spesimen dengan komposisi   resin 90%, katalis 10% didapat nilai kekerasan rata-rata 97,8 HRC. Spesimen dengan panjang serat 95 mm dengan komposis 70%, resin 20%, katalis 10% didapat nilai kekerasan rata-rata 105,9 HRC Spesimen menggunakan serbuk pelepah pisang 80%, resin 10%, katalis 10% didapat nilai kekerasan 90,7 HRC. Kesimpulannya spesimen dengan perbandingan panjang serat 95 mm 70%, resin 20%, katalis 10% mempunyai nilai kekerasan yang paling tinggi dibandingkan dengan spesimen tanpa serat, dan perbandingan serbuk pelepah pisang 80%, resin 10%, katalis 10%.
Performance analysis of solar photovoltaic thermal (PV/T) dryer for drying moringa leaf Een Tonadi; Niharman; Besti Wiranto
JTTM : Jurnal Terapan Teknik Mesin Vol 5 No 1 (2024): JTTM: Jurnal Terapan Teknik Mesin
Publisher : Teknik Mesin - Sekolah Tinggi Teknologi Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/jttm.v5i1.777

Abstract

Though its considerable solar energy potential prevents equal distribution throughout the region, Indonesia has not made the best use of it, particularly when it comes to integrated drying and electrical technologies. There are a number of drawbacks to traditional direct drying, particularly with regard to food goods. These include the possibility of contamination, discolouration, and animal disturbance. The purpose of this research is to develop, build, and evaluate an integrated drying technology—a solar photovoltaic thermal (PV/T) dryer—that can generate heat and electricity at the same time. The dried material used in this dryer is moringa leaves. This study employs an experimental design methodology, first developing and building a greenhouse-style PV/T dryer with three levels of shelves. Second, a test of the tool's functionality was conducted using 1000 grams of material on each shelf. Measuring devices such digital thermocouples, multimeters, solar power meters, and humidity meters are utilized to get test parameter data. The average daily solar intensity, according to the research findings, is 436.60 watts/m2. Shelf 1, which is next to the collector outlet, had the highest average temperature (53.9 °C), whereas shelf 3 had the lowest average temperature (37.1 °C). With an average voltage of 30.89 volts and an average current of 4.08 amperes, solar panels generate an average power of 85.65 watts. In the meantime, the material's mass decreased after drying for nine hours, on average by 72%, according to the drying data. With an average power of 86.65 watts, an average temperature on the third shelf between 37.1 °C and 40.6 °C, and an average mass reduction of 72%, it can also be stated that this PV/T dryer is quite successful for drying.
Co-Authors Besti Wiranto Lelawati Muhammad Halil Niharman Roki Alianda Safentry, Aan