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All Journal Jurnal Teknik Mesin Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Malikussaleh Journal of Mechanical Science Technology Jurnal Polimesin
Dedi Afandi
Universitas Syiah Kuala
Aerospace Engineering Automotive Engineering Control & Systems Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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KAJI SISTEM PEMANASAN BERTAHAP PADA PENGOLAHAN MINYAK KELAPA MURNI ratna sary; Ahmad Syuhada; Dedi Afandi
Jurnal Teknik Mesin Vol 9, No 2 (2021)
Publisher : Jurnal Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jtm.v9i2.25821

Abstract

Some of the characteristics of virgin coconut oil are to produce products with lower water and acid content, clear color and have a long shelf life of 12 months. Pure coconut oil is growing rapidly not only for household needs, but is widely used for cosmetics and medicine. From an economic point of view, virgin coconut oil has a higher selling price than coconut oil which is traditionally processed by heating coconut milk or depositing coconut milk for a long time, resulting in a rancid odor and poor quality due to high water and free fatty acid content. Therefore, research on the heating process was carried out to obtain virgin coconut oil with lower water content and free fatty acids according to SNI. There are 3 methods of making virgin coconut oil, namely the method of fermentation, inducement and heating. The method used in this research is the gradual heating method, the heating method is tested with gradual heating or one heating, for gradual heating, preheating is carried out at a temperature of 60-110°C with 9 hours of drying time and final heating with a temperature variation of 60°C ( sample A), 70°C(sample B), 80°(sample C) and drying time of 5 hours, 4 hours and 3 hours. The results showed that the drying air temperature had an effect on product quality and drying time. The results of calculations and tests show that the most effective treatment is sample A with the lowest water content and free fatty acid content reaching 0.08% and 0.10%.
Studi Eksperimental Pengaruh Konfigurasi Penampang Sekat Terhadap Kinerja Novel Cooling Tower Prototype Dedi Afandi; Ahmad Syuhada; Ratna Sary; Zulfan Zulfan; Asra Yufandi
Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Vol 8, No 2 (2022): Oktober
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (26.898 KB) | DOI: 10.35308/jmkn.v8i2.6190

Abstract

Cooling towers are widely applied in industries such as power plants and oil refineries, where the equipment produces excess heat that needs to be removed. The effect of baffles configuration on the performance of the novel cooling tower prototype was studied experimentally. The configuration of the baffles used is the baffle section without holes, the baffle section with 15 holes, the baffle section with 25 holes, and the baffle section with 35 holes. The water inlet temperature was varied, namely 55⁰C, 75⁰C, and 90⁰C. water is flowed from the main reservoir to the upper reservoir of the cooling tower using a pump, and water from the upper reservoir falls on the baffles of the cooling tower. Inlet water temperature, outlet water temperature, and water temperature at each baffle were measured using a thermocouple. The results showed that the cooling tower with a baffle of 35 holes produced the most optimal performance. The heat transfer rate produced by the cooling tower with a 35-hole baffle at an inlet temperature of 55⁰C is 624.64 Watts. At the water inlet temperature of 75⁰C, the average heat transfer rate produced by the cooling tower with a 35-hole baffle increased by 42.6%. The average heat transfer rate produced by a cooling tower with a 35-hole baffle at a water inlet temperature of 90⁰C increased by 62.6%. This is because the cooling tower with a baffle of 35 holes causes the water droplets that pass through the baffle to split into more and more so that the heat transfer rate is higher.
DESAIN ERGOMETER KAYAK BERDASARKAN ANTROPOMETRI DAN BIOMEKANIK ATLET Muhammad Nuzan Rizki; A Asnawi; Nurul Islami; Rizki Aulia Nanda; Dedi Afandi
Malikussaleh Journal of Mechanical Science and Technology Vol 6, No 3 (2022): Malikussaleh Journal of Mechanical Science and Technology
Publisher : Malikussaleh University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/mjmst.v6i3.10405

Abstract

Kekuatan otot dan daya tahan kaki sangat penting dalam menghasilkan rotasi tubuh bagian atas yang baik. Namun, latihan kekuatan tubuh bagian atas lebih diutamakan dari pada latihan kekuatan bagian tubuh lainnya karena keterlibatannya yang lebih dominan dalam stroke saat mendayung. Oleh karena itu, Atlet kayak memerlukan sarana latihan yang dapat membantu dalam upaya peningkatan kekuatan tubuh bagian atas. Salah satu sarana yang terbukti mampu memenuhi kebutuhan latihan Atlet tersebut yaitu Ergometer Kayak. Ergometer kayak dapat mensimulasikan kegiatan dayung di air dan menjadi sarana pelatihan yang mudah karena dilakukan di daratan. Pada penelitian ini dilakukan perancangan alat ergometer kayak berdasarkan antropometri dan biomekanik Atlet. Diawali dengan melakukan identifikasi kebutuhan, menyusun spesifikasi teknis, pengukuran antropometri & biomekanik Atlet, dan diakhiri dengan mendesain ergometer kayak menggunakan perangkat lunak CAD. Hasil dari penelitian ini yaitu desain ergometer kayak yang sesuai dengan antropometri dan biomekanik Atlet. Sehingga dapat membantu Atlet untuk meningkatkan kenyamanan dan kualitas pada saat pelatihan.
Characteristics of temperature uniformity system in multi-tier drying equipment with sharp turning technology dedi afandi; Ahmad Syuhada; razali razali; muhammad ilham maulana
Jurnal POLIMESIN Vol 22, No 2 (2024): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i2.4693

Abstract

Drying is a process of heat and mass transfer that occurs on the surface and within the material to be dried. It helps reduce the internal moisture of the material, inhibiting the growth, damage, and chemical changes of microorganisms during storage, thus extending the shelf life of dry materials and improving the quality of raw materials. This study aims to test multi-level drying equipment using combustion heat with a square shape and racks inside it used as the drying space for the material. The raw material was placed on racks made of perforated metal. This  research started from designing the drying equipment system, fabricating and testing system. The drying system was tested using fish and cocoa beans as sample materials. The tested equipment system included temperature distribution in the combustion chamber, distribution system of hot combustion gases through sharp turning technology, uniform temperature distribution in the drying chamber with 8 levels of racks, each capable of holding a load of 10 kg, and testing of the chimney system. The research findings concluded that to maintain a drying chamber temperature of 90⁰C, an average combustion chamber temperature of 339⁰C was required. The average combustion chamber temperature needed to maintain a drying chamber temperature of 80⁰C was 290⁰C. For a drying chamber temperature of 70⁰C, an average combustion chamber temperature of 314⁰C was required. The temperature distribution inside the drying chamber moves horizontally, indicating that the temperature distribution in the drying chamber was uniform for each drying rack.
Co-Authors Ahmad Syuhada Asnawi Asra Yufandi Muhammad Ilham Maulana Muhammad Nuzan Rizki Nurul Islami, Nurul Ratna Sary Razali Razali Rizki Aulia Nanda Zulfan Zulfan