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All Journal Turbo : Jurnal Program Studi Teknik Mesin Journal TEPAT: Teknologi Terapan untuk Pengabdian Masyarakat Piston: Journal of Technical Engineering MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Prosiding Simposium Nasional Multidisiplin (SinaMu) Smart Humanity: Jurnal Pengabdian Masyarakat
Jheri Hermanto
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Mathematics Mechanical Engineering Nursing Physics Public Health Social Sciences Other

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SIMULASI NUMERIK KARAKTERISASI SOLAR WATER HEATER SISTEM AKTIF DENGAN VARIASI JUMLAH KAPSUL Jheri Hermanto; Joko Waluyo
Prosiding Simposium Nasional Multidisiplin (SinaMu) Vol 4 (2022): Simposium Nasional Multidisiplin (SinaMu)
Publisher : Universitas Muhammadiyah Tangerang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31000/sinamu.v4i1.7879

Abstract

AbstrakPhase change material (PCM) merupakan material yang dapat menyimpan energi termal secara panas laten. Penggunaan PCM berfungsi meningkatkan kapasitas penyimpanan panas serta mendapatkan unjuk kerja yang terbaik. Penelitian ini bertujuan untuk mengetahui karakteristik PCM menggunakan simulasi 3D dengan metode pendekatan enthalphy-porosity berupa waktu pelelehan, pola pelehan, heat transfer, dan panas kumulatif. Simulasi dilakukan pada laju aliran 1 lpm dan heat flux konstan pada 1.000 W/m2. Jumlah PCM di dalam tangki penyimpan panas SWH divariasikan menjadi 6, 9 dan 12 kapsul PCM. Hasil simulasi SWH dengan jumlah 12 kapsul memiliki panas kumulatif yang paling besar. SWH dengan jumlah 6 kapsul mencapai fraksi cair 1 setelah 93,7 menit dengan panas kumulatif 701,74 kJ, sedangkan pada 9 kapsul fraksi cair 1 setelah 89,1 menit dengan panas kumulatif 1.322,12 kJ, dan pada 12 PCM fraksi cair 1 setelah 87,5 menit dengan panas kumulatif 1.744,62 kJ.Kata Kunci: Studi numerik, Pelelehan, Phase Change Materials, Solar Water HeaterAbstractPhase change material (PCM) is a material that can store thermal energy latently. The use of PCM serves to increase the heat storage capacity and get the best performance. This study aims to determine the characteristics of PCM using 3D simulation with the enthalphy-porosity approach in the form of melting time, melting pattern, heat transfer, and combined heat. The simulation was carried out at a flow rate of 1 lpm and a constant heat flux of 1.000 W/m2. The amount of PCM in the SWH heat storage tank was varied to 6, 9 and 12 PCM capsules. SWH simulation results with a total of 12 capsules have the greatest cumulative heat. SWH with 6 capsules reached liquid fraction 1 after 93,7 minutes with a cumulative heat of 701,74 kJ, whereas in 9 capsules liquid fraction 1 after 89,1 minutes with a cumulative heat of 1.322,12 kJ, and in 12 PCM liquid fraction 1 after 87,5 minutes with a cumulative heat of 1.744,62 kJ.Keywords: Numerical study, Melting, Phase Change Materials, Solar Water Heater
Pengembangan Freeze Vacuum Drying Dengan Sistem Kendali Menggunakan Reverse Valve Martin, Awaludin; Hermanto, Jheri; Agustina, Dinni; Surianto, Muhammad Akbar; Putri, Sunny Ineza; Khotimah, Nur
TURBO [Tulisan Riset Berbasis Online] Vol 13, No 2 (2024): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v13i2.3845

Abstract

The post-harvest handling process for rice aims to reduce the water content of rice grain, one of which is using the drying method. To maintain the quality of grain, evaluation and corrections are needed in handling so that losses can be minimized. Mechanical drying methods such as freeze drying are an effective vacuum solution, because they combine freeze drying and vacuum drying which have advantages in efficiency and quality of results. This vacuum dryer prototype has a maximum capacity of 10 kg of rice, the refrigerant used is R-134a, and the vacuum pressure that can be achieved is 5 bar below atmospheric pressure. This research will use variations in mass of 1 kg, 5 kg, and 10 kg, then the mass of 10 kg will be varied with refrigerant pressure of 14 bar, 15 bar, and 16 bar. The results of this test are that for the mass variation of 1 kg the air content that can be removed is 89% for 12.1 hours, for the mass of 5 kg the air content that can be removed is 85% for 15.3 hours, and for the mass of 10 kg the air content that can be removed is 76% for 17.5 hours. For variations in refrigerant pressure at a pressure of 16 bar 78% of the air content is lost for 19.8 hours, 15 bar 76% of the air content is lost for 19 hours, and 14 bar 62% of the air content is lost for 18 hours
Coupled Thermo-Structural Simulation of Al2618, Al4032, and Al6061 Pistons in a Single-Cylinder Diesel Engine Baharudin, Agus; Purwanto, Wawan; Setiawan, M. Yasep; Putra, Dwi Sudarno; Arif, Ahmad; Hermanto, Jheri
MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Vol 7 No 2 (2025): Motivection : Journal of Mechanical, Electrical and Industrial Engineering
Publisher : Indonesian Mechanical Electrical and Industrial Research Society (IMEIRS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46574/motivection.v7i2.471

Abstract

This study presents a thermo-structural finite element analysis of a single-cylinder diesel piston using ANSYS, comparing three aluminum alloys: Al2618-T61, Al4032-T6, and Al6061-T6. A coupled simulation approach was applied, where steady-state thermal results were imported into static structural analysis. Realistic boundary conditions, including applied combustion pressure, symmetry constraints, and cylindrical pin supports, were implemented based on Yanmar TF55 engine geometry. Results indicate that Al6061-T6 experienced the highest deformation and stress, nearing its yield limit at elevated temperatures. In contrast, Al2618-T61 and Al4032-T6 maintained structural integrity, with lower stress and elastic deformation within safe limits. Al4032 demonstrated superior dimensional stability, while Al2618 exhibited better strength under thermal load. These findings validate the importance of coupled thermal-structural analysis and material selection in piston design. The proposed framework offers reliable guidance for developing more durable, thermally resilient pistons for modern diesel engines.
Perencanaan dan Pembuatan Mesin Pencacah Sampah Organik Tipe Vertikal Skala Rumah Tangga Wulan Sari, Annisa; Ineza Putri, Sunny; Hermanto, Jheri; Agung Cahyo P, Brian; Kurniawan, Raka; Umam, Irsyadil
SMART HUMANITY : Jurnal Pengabdian Masyarakat Vol. 2 No. 1: Maret 2025
Publisher : CV. Smart Scienti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70427/sh.v2i1.237

Abstract

Pengelolaan sampah organik rumah tangga di Kecamatan Mandau masih menjadi masalah lingkungan. Untuk mengatasi hal ini, dibuat mesin pencacah sampah organik vertikal yang sederhana, efisien, dan cocok untuk rumah tangga. Metode pelaksanaan meliputi identifikasi kebutuhan masyarakat, perancangan mesin, pembuatan dan uji coba alat, serta sosialisasi dan pelatihan kepada warga setempat. Mesin mampu mencacah sampah dengan kapasitas ±10 kg/jam untuk pengomposan. Sosialisasi dan pelatihan diikuti oleh 40 peserta dengan tingkat kepuasan yang tinggi dan minat berkelanjutan dalam pemanfaatan mesin. Mesin memiliki desain kompak, mudah digunakan, dan hemat energi, namun masih perlu pengembangan terutama untuk mencacah sampah keras seperti tongkol jagung dan batang pisang. Kegiatan ini diharapkan dapat mendorong masyarakat dalam mengelola sampah secara mandiri dan mendukung upaya pelestarian lingkungan melalui pengurangan limbah organik di tingkat rumah tangga.
Design of Helical Type Steam Generator for Experimental Power Reactor – Helium Side Putri, Sunny Ineza; Subekti, Mohammad; Martin, Awaludin; P, Brian Agung Cahyo; Hermanto, Jheri; Siregar, Ansor Salim
Piston: Journal of Technical Engineering Vol. 9 No. 1 (2025)
Publisher : Program Studi Teknik Mesin Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/pjte.v9i1.51645

Abstract

Previous research has not analyzed the helium temperature distribution in the RDE steam generator shell. This study aims to fill that gap by analyzing these thermal characteristics with empirical calculations and Ansys Fluent simulations. The validity of the RDE steam generator design is reaffirmed, having been successfully analyzed from both the water-flow perspective in previous research and the helium-side perspective in the present study. The analytical methods used herein showed strong consistency, with empirical and numerical simulation results differing by less than 10% across all parameters. Although the calculated shell height of 5.73 m exceeds the RDE design's 4.97 m, the overall design's validity is confirmed.
Residential AC Technician Competency Training and Certification (Level 3) in Pekanbaru Brian Agung Cahyo P.; Sunny Ineza Putri; Jheri Hermanto; Anita Susilawati; Dedy Masnur; Dodi Sofyan Arief; Putri Nawangsari; Annisa Wulan Sari; Mintarto .; Hanif Nugroho Aji; Rahmatsyah Maksum Ramsi
JURNAL TEPAT : Teknologi Terapan untuk Pengabdian Masyarakat Vol 9 No 1 (2026): Environmental-based Awareness for Agile Community Strength
Publisher : Faculty of Engineering UNHAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/jurnal_tepat.v9i1.687

Abstract

This Community Service Activity by the Mechanical Engineering Department of Riau University was a strategic move to address the urgent need for the formalization and quality improvement of Air Conditioner (AC) technicians. The program was based on the official appointment of Mechanical Engineering Unri as a Temporary Competency Test Center by a credible Professional Certification Body (LSP), affirming the institution's role in implementing the National Work Competency Standards (SKKNI). Targeting technicians with a minimum of one year of experience, the program had a dual objective: validating the existing practical skills while enhancing knowledge on crucial aspects like Occupational Health and Safety (K3) and environmentally compliant refrigerant handling. The PKM was implemented through structured stages, commencing with strict recruitment and selection, followed by comprehensive training delivered by Unri's competent lecturers, focusing on core competency units. The culmination was the Competency Test, conducted independently by certified Assessors from the partner LSP at the Unri TUK. The assessors evaluated participants' knowledge, skills, and work attitude through written, oral, and practical examinations. The main outcome of this activity was the successful certification of professional technicians. A total of 10 (ten) AC technicians were declared Competent and officially received the AC Technician Professional Competency Certificate from BNSP. This achievement significantly contributes to upgrading the quality and competitiveness of the local workforce, boosting professionalism, service quality, and career prospects for the certified technicians.
Co-Authors Agung Cahyo P, Brian Agustina, Dinni Ahmad Arif Anita Susilawati Annisa Wulan Sari Awaludin Martin Baharudin, Agus Brian Agung Cahyo P. Dedy Masnur, Dedy Dodi Sofyan Arief, Dodi Sofyan Dwi Sudarno Putra Hanif Nugroho Aji Joko Waluyo Khotimah, Nur Kurniawan, Raka M. Yasep Setiawan Mintarto . P, Brian Agung Cahyo Purwanto, Wawan Putri Nawangsari Rahmatsyah Maksum Ramsi Siregar, Ansor Salim Subekti, Mohammad Sunny Ineza Putri Surianto, Muhammad Akbar Umam, Irsyadil Wulan Sari, Annisa