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All Journal Jurnal Sains dan Teknologi Jurnal Foundry
Tri Satya Ramadhoni
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Dentistry Electrical & Electronics Engineering Energy Engineering Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Public Health Veterinary

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PERANCANGAN HEAT EXCHANGER SISTEM PEMANAS AIR BERBASIS SISTEM REFRIGERASI R410A Muhammad Irfan Dzaky; Ahmad Imam Rifa’i; Zainuri Anwar; Baiti Hidayati; Tri Satya Ramadhoni; Toni Okviyanto; Herlin Sumarna; Ahmad Zikri; Ghifari Nasution
Journal Foundry Vol. 7 No. 1 (2024): Journal Foundry
Publisher : Journal Foundry

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Abstract

Ketersediaan air panas dalam lingkungan apartemen memiliki peran krusial dalam memberikan kenyamanan, kebersihan, dan efisiensi bagi penghuninya. Perancangan sistem inovatif pemanas air yang menggabungkan prinsip dasar refrigerasi menjadi sorotan utama, dengan fokus pada pemahaman mendalam mengenai beragam sumber energi, termasuk pemanfaatan energi listrik, tenaga surya, dan panas buangan AC. Keselamatan penggunaan pemanas air juga ditegaskan sebagai hal yang penting, dengan penekanan pada risiko kebakaran akibat kelalaian dan tersengat aliran listrik. Tujuan utama penelitian ini adalah untuk merancang sistem pemanas air yang efektivitas berbasis sistem refrigerasi. Metode penelitian difokuskan pada perancangan sistem pemanas air (Air Conditioning Water Heater/ACWH) dengan prinsip refrigerasi R410a. Hasil perhitungan mengenai dimensi pipa tembaga yang optimal untuk memanaskan air hingga temperatur yang diinginkan, serta faktor termal yang terlibat, dijelaskan secara rinci. Heat exchanger yang digunakan adalah tipe double pipe dengan ukuran panjang pipa tembaga 16,68 meter mampu efektif memanaskan air dari 27°C menjadi 50°C dengan aliran 100 l/jam dengan ukuran diameter pipa 3/8 inci dan 1 1/8 inci dengan dimensi heat exchanger secara keseluruhan 106 cm x 69,3 cm
Analisis Tegangan dan Kegagalan Yoke Propeller Shaft Truk Angkutan Sawit Menggunakan Metode Elemen Hingga Tri Satya Ramadhoni; Sumarna, Herlin; Okviyanto, Toni; Purfaji, Purfaji; Dwi Sampurno, Rachmat
INSOLOGI: Jurnal Sains dan Teknologi Vol. 5 No. 2 (2026): April 2026
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/insologi.v5i2.8001

Abstract

Failure of slip yoke components in palm oil transport vehicle transmission systems is generally caused by complex and cyclic dynamic loading. This study aims to analyze stress distribution and predict failure locations using a Metode Elemen Hingga (FEM)-based approach. A three-dimensional model was developed from actual geometry with controlled simplification using AISI 4140 material. Mesh convergence and quality evaluation were conducted to ensure numerical reliability. The results show that maximum stress increases with load, reaching 196.14 MPa, 294.38 MPa, 392,40 MPa, and 490.52 MPa for loads of 4, 6, 8, and 10 tons, respectively. At 10 tons, the stress exceeds the material yield strength (415 MPa), indicating plastic deformation. Stress concentration occurs at the critical section (C–C) due to geometric discontinuities and combined loading, consistent with observed failure locations. Comparison with analytical results shows less than 1% deviation, confirming model accuracy. This study demonstrates that FEM effectively predicts stress distribution and failure mechanisms, providing a basis for design optimization and maintenance strategies.
Co-Authors Ahmad Imam Rifa’i Ahmad Zikri Dwi Sampurno, Rachmat Ghifari Nasution Herlin Sumarna Muhammad Irfan Dzaky Okviyanto, Toni Purfaji, Purfaji Sumarna, Herlin Toni Okviyanto zainuri anwar