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Journal : Journal BEARINGS: Borneo Mechanical Engineering and Science

Design of Sprocket and Chain Transmission System on Seaweed Dryer Machine Prihanto, Prihanto; Murdianto, Deny; Nurdin, Muhammad Firdan
Journal BEARINGS: Borneo Mechanical Engineering and Science Vol 3, No 1 (2024)
Publisher : Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/bearings.v3i1.5059

Abstract

Seaweed is an abundant aquatic product in Indonesia, where around 80% of its production is sold dry. The drying process of seaweed is done in 2 ways, namely direct sunlight or a drying machine method. Seaweed drying machines require a power transmission system to optimize the drying process. The aim of this study is to design a transmission system for a ratary dryer drying machine. The method used in this study is the design and selection of a sprocket and chain transmission system. The research result showed that the chain used was number 25, a single chain with 59 links and a ratio of 15 sprocket pins to 38. The axle distance is 100.4 mm using steel shaft material bearing with the symbol S30C with the drip lubrication method. The sprocket and chain that have been designed were capable of transmitting 14 watts of electric dynamo energy with a torque of around 4.75 Nm at 19.56 revolutions for a load of 1 kg of seaweed.
Pemanfaatan Limbah Plastik dari Polietilen Tereftalat PET sebagai Penguat pada Komposit Bermatriks Epoxy Laksana, Alfian Hudan; Waluyo, Marhadi Budi; Murdianto, Deny; Wahyudi, Muhammad
Journal BEARINGS: Borneo Mechanical Engineering and Science Vol 3, No 1 (2024)
Publisher : Faculty of Engineering, Universitas Borneo Tarakan

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Abstract

Public consumption of bottled drinking water continues to increase. Single use plastic bottled water is still an option, this increases plastic waste. The main cause is that plastic cannot be decomposed so it has a bad impact on the environment. Plastic waste recycling has been done to reduce plastic waste but is still in low quantities. One of the recycling processes of plastic waste bottles can be utilized as composite materials. Composite consists of elements namely matrix and filler. In this study, the composite is composed of epoxy as a matrix and plastic bottle waste as a filler. The composition of the filler used ranges from 12.5%, 15%, 17.5%, 20%. The composite was made using the hand lay-up method. The composite that had been made was tested for hardness and impact to observe its mechanical properties. From the results of the research test, it was obtained that the greater the variation of the filler used, the lower the impact strength and hardness values. The highest impact strength was 1.02 J/mm2 Joule at a variation of 12.5%. The highest data results from the hardness test in this study were at a variation of 20% of 75.33 shore D.
Rancang Bangun Alat Pemotong Kentang Stick Dengan Menggunakan Mesin Penggerak Dinamo Listrik Skala Rumah Tangga Aji, Deva Dian Satrio; Murdianto, Deny; Nurdin, Muhammad Firdan
Journal BEARINGS: Borneo Mechanical Engineering and Science Vol 3, No 2 (2024)
Publisher : Faculty of Engineering, Universitas Borneo Tarakan

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Abstract

The processing of potato into fried potato sticks is one of the popular fastfood processing in Indonesia. One of the entrepreneurs in Tarakan City named Randi still uses manual tools to cut potatoes into the fried potato sticks, so the process is less efficient and effective. To solving this problem, it is necessary to create a potato stick cutting machine that is economically valuable. The purpose of this research is to design an potato stick machine. Based on the final design, the electric motor used is a single-phase AC gearbox motor with a power of 0.18 kW at 41.7 rpm, which is transmitted using a type B V-belt to the potato cutter. The test results of this potato stick cutting machine show a potato stick cutting capacity of 192.17 kg/hour with an electricity usage cost of Rp. 187.84/hour.
Analisis Pengaruh Sabut Kelapa Terhadap Kekuatan Impact Dan Kekerasan Material Komposit Bermatriks Epoxy Baihaqi, Ahmad Adi; Waluyo, Marhadi Budi; Murdianto, Deny
Journal BEARINGS: Borneo Mechanical Engineering and Science Vol 3, No 2 (2024)
Publisher : Faculty of Engineering, Universitas Borneo Tarakan

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Abstract

Coconut fiber is one of the versatile natural materials with various applications in various industries. Coconut fiber is used in the manufacture of ropes, fabrics, and other textile products. This fiber is often used in the production of sacks, mats, and wickerwork. Coconut fiber can be used as a mixture in the manufacture of concrete and other building materials. Coconut fiber can also be used as a composite material. Composites consist of two elements, namely matrix and filler. This study aims to determine the effect of coconut fiber variations on impact strength and hardness. The composition of the filler is around 10, 15, 20 (%) of coconut fiber with matrix resin. The addition of filler is accompanied by a reduction in the matrix used from 100% epoxy. Specimens with NaOH treatment were made with 9 specimens and without treatment were made as many as 3 specimens. Composites were made by hand lay-up process. The composites that have been made were then subjected to mechanical tests, namely hardness and impact. The highest hardness test data results with NaOH treatment at variation (15%/85%) were 75 shore D. The lowest hardness at variation (10%/90%) was 63 Shore D. While without treatment the research results showed the highest at variation (10%/90%) was 74 Shore D. And the lowest hardness at variation (20%/80%) was 63 Shore D. The highest impact strength of NaOH treatment was at variation 20% absorbed energy of 3.28 Joules and impact toughness of 0.020 J/mm2. The highest untreated composite was at variation 20% absorbed energy 0f 3.39 Joules and impact toughness of 0.021 J/mm2.
Pengaruh Variasi Diameter Pipa Inlet Terhadap Kinerja Pompa Hidram Sultan, Sultan; Murdianto, Deny; Sudirman, Sudirman
Journal BEARINGS: Borneo Mechanical Engineering and Science Vol 2, No 1 (2023)
Publisher : Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (586.796 KB) | DOI: 10.35334/bearings.v2i1.3432

Abstract

Pompa hidram (Hydraulic Ram Pump) merupakan pompa pemindah air dari tempat rendah ke tempat yang lebih tinggi atau dari tempat yang tidak terlalu tinggi ke tempat yang lebih tinggi. Prinsip kerja hidram adalah dari hantaman air yang kemudian mendorong air untuk ke tempat yang lebih tinggi. Untuk mendapatkan energi potensial dari hantaman air diperlukan syarat utama yaitu harus ada terjunan air yang dialirkan melalui pipa dengan beda tinggi elevasi dengan pompa hidram minimal 1 meter. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh variasi diameter pipa inlet terhadap kinerja pompa hidram. Metode yang digunakan adalah eksperimen rancang bangun pompa hidram. Pengaruh variasi diameter pipa inlet terhadap kinerja pompa hidram pada penilitian ini menggunakan 1 inci, 2 inci dan 21/2 inci. Dari penelitian didapatkan hasil debit discharge tertinggi pada pipa inlet 1 inci sebesar 6,028 , debit katup buang terendah didapatkan pada pipa inlet 1 inci sebesar 16,940 , dan efisiensi volumetris tertinggi 49,590% didapatkan pada diameter pipa inlet 1 inci.
Modifikasi Box Pendingin Termoelektrik Menggunakan Box Berbahan Plastik Mahardika, Hikmal; Murdianto, Deny; Nurdin, Muhammad Firdan
Journal BEARINGS: Borneo Mechanical Engineering and Science Vol 4, No 1 (2025)
Publisher : Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/bearings.v4i1.6605

Abstract

Di era teknologi yang terus berkembang, sistem pendingin menjadi komponen penting dalam berbagai aplikasi, mulai dari penyimpanan makanan hingga transportasi obat-obatan. Salah satu alternatif yang lebih ramah lingkungan dibandingkan sistem kompresi uap adalah sistem pendingin termoelektrik. Namun, desain dan material yang digunakan pada box pendingin termoelektrik masih memiliki keterbatasan, terutama dalam hal isolasi termal dan ketahanan terhadap kelembaban. Penelitian ini bertujuan untuk memodifikasi box pendingin termoelektrik dari bahan kayu menjadi bahan plastik guna meningkatkan efisiensi pendinginan. Modifikasi dilakukan dengan mengganti material box menggunakan plastik jenis Polypropylene (PP) yang memiliki sifat ringan, tahan terhadap kelembaban, dan daya isolasi termal yang baik. Box plastik ini dirancang dengan lapisan tambahan berupa busa Expanded Polystyrene (EPS) untuk meningkatkan performa pendinginan. Metode penelitian yang digunakan adalah eksperimental dengan pendekatan kuantitatif. Pengujian dilakukan untuk membandingkan efisiensi sistem sebelum dan setelah modifikasi dengan mengukur suhu, daya input, serta Coefficient of Performance (COP). Hasil penelitian menunjukkan bahwa setelah modifikasi, suhu dalam box dapat mencapai 17,62°C dibandingkan dengan 19,65°C sebelum modifikasi. Selain itu, daya input berkurang dari 176 Watt menjadi 99 Watt, dan nilai COP meningkat dari 0,03 menjadi 0,06, yang menunjukkan peningkatan efisiensi pendinginan secara signifikan. Dengan demikian, penggunaan material plastik terbukti mampu meningkatkan performa pendinginan serta efisiensi energi pada sistem pendingin termoelektrik. Hasil penelitian ini dapat menjadi dasar bagi pengembangan lebih lanjut dalam desain sistem pendingin yang lebih ramah lingkungan dan efisien.