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All Journal INTEKNA Machine : Jurnal Teknik Mesin Pendas : Jurnah Ilmiah Pendidikan Dasar NUSANTARA: Jurnal Pengabdian Kepada Masyarakat
Arif Rochman Fachrudin
Unknown Affiliation
Automotive Engineering Computer Science & IT Economics, Econometrics & Finance Electrical & Electronics Engineering Mechanical Engineering Social Sciences Other

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PENGARUH PANJANG KONDENSOR TERHADAP KINERJA TERMAL HEAT PIPE Arif Rochman Fachrudin
INTEKNA informasi teknik dan niaga Vol 20 No 01 (2020): Jurnal INTEKNA, Volume 20, No. 1, Mei 2020: 01-52
Publisher : P3M Politeknik Negeri Banjarmasin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31961/intekna.v20i01.815

Abstract

Heat pipe merupakan salah satu alat penukar kalor yang memungkinkan pemindahan sejumlah kalor melalui luas permukaan yang sangat kecil. Heat Pipe mempunyai peran penting dalam sistem pendinginan salah satunya dalam komponen elektronika. Dengan sistem pendinginan maka temperatur komponen akan terjaga sehingga terhindar dari kerusakan kerusakan yang diakibatkan dari panas yang berlebih (over heating). Heat pipe terdiri dari tiga bagian, yaitu evaporator, adiabatis dan kondensor. Kedalam pipa itu diberi fluida kerja yang berfungsi membawa panas dari evaporator dan melepaskannya di kondensor. Di bagian Evaporator, panas dari komponen yang didinginkan diserap dan dipindahkan ke ujung yang lain yaitu bagian Kondensor untuk dilepas panasnya dilingkungan. Heat pipe mempunyai prinsip yang hampir sama dengan thermosyphon, perbedaannya adalah di heat pipe menggunakan dinding wick. Kegiatan penelitian ini bertujuan mengetahui sejauh mana kinerja termal dari heat pipe sebagai penukar kalor dengan variasi panjang kondensor. Heat Pipe didesain dengan variasi panjang kondensor sebesar 44 cm ,66 cm,88 cm,110 cm dan 132 cm.. Hasil penelitian menunjukkan bahwa, Tahanan thermal tertinggi pada panjang kondensor terpendek pada tempeatur 400C (14 C/W) dan terendah pada panjang kondensor terpanjang pada temperatur 1200 C(1 C/W). Pada semua temperatur, semua variasi panjang kondensor maka daya output dan fluks kalor akan semakin besar. Pada panjang kondensor ukuran yang sama dengan evaporator, semakin tinggi temperatur, maka semakin besar fluks kalor dan daya output. Proses pada eksperimen ini paling efektif pada panjang kondensor 1,25 kali (132 cm) dari panjang panjang evaporator, karena setelahnya nilai tahanan termal dan daya output akan mengalami kecernderungan tetap.
PENERAPAN SISTEM PERAWATAN METODE ISMO PADA TURBIN TIPE VERTICAL FRANCIS KAPASITAS 35 MW Arif Rochman Fachrudin
Machine : Jurnal Teknik Mesin Vol 7 No 2 (2021): Machine : Jurnal Teknik Mesin
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jm.v7i2.1916

Abstract

The ISMO maintenance method is a maintenance method that is carried out when the machine performance has started to decline, the history of the machine is limited and there is a lack of information with the manual book. This method uses a reference degree of complexity to determine the scheduling. This maintenance method is applied to the Francis vertical type turbine with a capacity of 35 MW. The purpose of this study is to obtain maintenance information in the form of maintenance schedules and estimated maintenance costs of the francis vertical type turbine with a capacity of 35 MW. From this research, a comprehensive maintenance schedule and cost targets are produced, starting from inspection, small repair, medium repair and over-houle activities along with the amount of costs. In one cycle, inspection activities are carried out 9 times, medium repair 6 times and overhoule 1 time. The total cost required to maintain the turbine of vertical francis type for a period of 3 years is IDR 97.937.000,-
PENGARUH FRAKSI VOLUME DAN ARAH SERAT RAMI TERHADAP KEKUATAN IMPAK MATERIAL KOMPOSIT UNTUK APLIKASI BUMPER Astuti, Fina Andika Frida; Arif Rochman Fachrudin; Mira Esculenta Martawati
Pendas : Jurnal Ilmiah Pendidikan Dasar Vol. 10 No. 04 (2025): Volume 10 No. 04 Desember 2025 Press
Publisher : Program Studi Pendidikan Guru Sekolah Dasar FKIP Universitas Pasundan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23969/jp.v10i04.36488

Abstract

The rapid growth of the automotive industry demands ongoing innovation in material engineering to improve vehicle performance and safety. The bumper, as a key structural component, must provide collision protection while supporting fuel efficiency and reducing environmental impact. A major challenge is producing bumpers that are both strong and lightweight, prompting exploration of composite materials. Among natural fibers suitable for composite reinforcement, ramie fiber is a promising candidate. Ramie fiber offers several advantages, including high mechanical strength and relatively low density. The objective of this study is to develop a composite material with high impact strength as an alternative bumper material. An experimental research method was employed, with composite fabrication carried out using the hand lay-up technique. The variables in this study included fiber orientation vertical, horizontal, and random. Volume fraction with variations of 30% fiber and 70% matrix; 45% fiber and 55% matrix; and 60% fiber and 40% matrix. The results indicate that both fiber orientation and volume fraction significantly affect impact strength. The lowest impact strength was observed in specimens with horizontal fiber orientation and a 30% fiber volume fraction, yielding 0.00719 J/mm². The highest impact strength was obtained from specimens with vertical fiber orientation and a 60% fiber volume fraction, reaching 0.05578 J/mm². Based on these findings, ramie fiber composites meeting the minimum impact strength standard for Toyota bumpers are those with a 60% fiber and 40% matrix composition, particularly with random or vertical fiber orientations.
USULAN PERAWATAN AREA CUTTING UNIT MESIN TUBER T-645M KAPASITAS 5000 KANTONG/HARI DENGAN PENDEKATAN FMEA Astuti, Fina Andika Frida; Arif Rochman Fachrudin
Pendas : Jurnal Ilmiah Pendidikan Dasar Vol. 11 No. 02 (2026): Volume 11 No. 02 Juni 2026 Press
Publisher : Program Studi Pendidikan Guru Sekolah Dasar FKIP Universitas Pasundan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23969/jp.v11i02.57781

Abstract

The Tuber T-645M machine is utilized in the production of cement bags made from kraft paper (pasted bags), converting paper rolls into semi-finished tubular forms (tubes). The Tuber machine consists of several operational sections, one of which is the Cutting Unit area. The Cutting Unit is responsible for cutting the continuously formed tubes produced by the Tube Forming Unit into predetermined lengths. Currently, the Cutting Unit does not have a scheduled component replacement program; therefore, components are replaced only after failure occurs. This condition leads to excessive machine downtime and disrupts the production process. This study aims to identify critical components and propose an appropriate maintenance strategy for the Tuber machine. The research employs the Failure Mode and Effects Analysis (FMEA) method to evaluate potential failure modes and their impacts. Based on the Risk Priority Number (RPN) analysis, four critical components were identified as the primary contributors to machine downtime, namely the differential gear, bearing, tear-off mechanism, and cam roller. The proposed maintenance strategy for the Cutting Unit of the Tuber T-645M machine is preventive maintenance, consisting of 28 scheduled component replacements and 38 maintenance activities to improve machine reliability and reduce downtime.
ANALISIS KEKUATAN IMPAK KOMPOSIT SERAT SISAL DENGAN VARIASI WAKTU PERENDAMAN DAN FRAKSI VOLUME SERAT Astuti, Fina Andika Frida; Arif Rochman Fachrudin; Faradilla Fauziyah
Pendas : Jurnal Ilmiah Pendidikan Dasar Vol. 11 No. 02 (2026): Volume 11 No. 02 Juni 2026
Publisher : Program Studi Pendidikan Guru Sekolah Dasar FKIP Universitas Pasundan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23969/jp.v11i02.57981

Abstract

Natural fiber-reinforced composites have emerged as promising alternative materials due to their low density, environmental friendliness, and favorable mechanical properties. Sisal fiber (Agave sisalana) is one of the most widely used natural fibers as a composite reinforcement because of its excellent mechanical performance. However, its hydrophilic nature results in poor interfacial bonding with polymer matrices, which adversely affects the mechanical performance of the composite. Alkali treatment using a 5% sodium hydroxide (NaOH) solution can improve the fiber surface characteristics, while the fiber volume fraction plays a significant role in determining load transfer efficiency and the composite's ability to absorb impact energy. This study aims to investigate the effects of sisal fiber soaking time in a 5% NaOH solution (120, 180, and 240 minutes) and fiber volume fractions of 35%, 50%, and 65% on the impact strength of polyester-based composites. The composites were fabricated using the hand lay-up method with a vertical fiber orientation. The results showed that the highest impact strength of 0.22409 J/mm² was obtained for the composite treated with a 240-minute soaking time and a 35% sisal fiber volume fraction with 65% polyester matrix. This improvement in impact strength indicates that the selected combination of immersion time and fiber volume fraction enhanced the interfacial bonding between the fiber and the matrix, thereby improving load transfer efficiency and impact energy absorption.
Penerapan Sistem Suplai Air Terintegrasi untuk Budidaya Bioflok Nila dan Greenhouse Sayur di KWT Mandiri Batu Achmad Walid; Khoirul Anwar; Irwanda Yuni Pungkiarto; Arif Rochman Fachrudin; Intan Fadhilah; Yuniarto Agus Winoko
Nusantara: Jurnal Pengabdian kepada Masyarakat Vol. 6 No. 3 (2026): Agustus: NUSANTARA Jurnal Pengabdian Kepada Masyarakat
Publisher : Lembaga Pengembangan Kinerja Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/nusantara.v6i3.10149

Abstract

The Kelompok Wanita Tani (KWT) Mandiri in Mojorejo Hamlet, Batu City, manages Nile tilapia biofloc culture and vegetable production in a greenhouse, but water delivery had relied on a manually moved hose. This community service program aimed to install an integrated water supply system linking a storage tank, booster pump, main pipeline, biofloc pond outlet, and greenhouse distribution line. The activity used technical assistance and technology transfer through field observation, hydraulic design, component selection, pipe fabrication, installation, functional testing, and operational guidance. The installed system successfully conveyed water from the storage tank through the pump and pipeline to the biofloc pond outlet, while the greenhouse distribution line was arranged along the planting beds. Visual testing showed a continuous water flow and confirmed the functional connection among the main components. The system simplified pond filling, organized the distribution network, and reduced the need to move hoses repeatedly. However, performance evaluation remained qualitative because pressure, discharge, head loss, and irrigation uniformity were not measured using gauges or flow meters. Therefore, follow-up monitoring is required to quantify hydraulic performance and optimize irrigation scheduling. The program demonstrates that a simple, maintainable water-supply network can support more practical management of integrated aquaculture and greenhouse activities at the community level.
Co-Authors Astuti, Fina Andika Frida Faradilla Fauziyah Intan Fadhilah KHOIRUL ANWAR Mira Esculenta Martawati Walid, Achmad Yuni Pungkiarto, Irwanda Yuniarto Agus Winoko