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All Journal Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Piston: Jurnal Teknologi
Herry Darmadi
Politeknik Teknologi Kimia Industri Medan
Aerospace Engineering Automotive Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering Physics

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PENGARUH TEMPERATUR UAP TERHADAP EKSPANSI VOLUME DAN TEGANGAN TERMAL RODA LORI DISTASIUN PEREBUSAN PT. X Herry Darmadi; Jery Manaor Simarmata; Sorta Lumbantoruan; Nurlianna Tarigan; Dian Kurnia; Novia Nelza
Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Vol 12, No 1 (2026): April
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jmkn.v12i1.15083

Abstract

Lorry wheels at the boiling station of a Palm Oil Mill (PKS) are exposed to high-temperature saturated steam during the boiling process, which causes volume expansion and thermal stress in the wheel material. This study aims to analyze the effect of steam temperature on volume expansion and thermal stress on lorry wheels in the palm oil mill sterilization station. Data were obtained through direct observation and theoretical calculations using ASTM A36 steel material parameters. The results show that an increase in steam temperature from 110.27°C to 133.59°C causes volume expansion of up to 1.39 × 10⁻⁵ m³ and thermal stress of up to 241.41 MPa, approaching the material's yield strength (250 MPa). It is concluded that steam temperature significantly affects deformation and potential failure of lorry wheel material.
Pengujian Mekanik (Kekerasan dan Impact) Logam Ferro Valve Plat Double Dampers yang Digunakan Sebagai Penyaring Abu Boiler Herry Darmadi; Arie Erza Erlangga Zebua; Nurul Shadrina Bintang; Agustin Nurya Savitri; Sorta Lumbantoruan
Piston: Jurnal Teknologi Vol 11 No 1 (2026): Volume 11(1) Juni 2026 
Publisher : Program Pendidikan Vokasi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55679/pistonjt.v11i1.134

Abstract

Double damper also known as a double flap damper, is a special control device used in the ash transfer system of a boiler before it enters the multi-cyclone. Mechanical testing (hardness and impact) is the most effective test for obtaining an overview of the mechanical properties of a material. Although hardness testing is only performed at a single point, or a specific area, the hardness value is quite valid in indicating the strength of a material. By conducting a hardness test, a material is easily classified as ductile or brittle. Impact testing is a test that uses rapid loading. In mechanical testing, there are differences in the type of load given to the material. Tensile testing, compression testing, and torsion testing are tests that use static loads. Meanwhile, impact testing uses dynamic loads. In rapid loading, also known as impact loading, a large energy absorption process occurs from the kinetic energy of a load that impacts the specimen. This energy absorption process will be converted into various responses in the material such as plastic deformation, isterisis effects, friction, and inertia effects. The purpose of this study is to determine the hardness value of the Double Dampers Valve Plate and to determine the strength of the Double Dampers Valve Plate through the impact test method. The test results obtained the hardness value of test material 1 (0°C) = 111.3 HRC, test material 2 (25°C) = 108.033 HRC, and test material 3 (100°C) = 103.9 HRC. In the impact test, the results of the impact strength analysis of test material 1 (0oC) = 0.215 Kg.m/mm2, test material 2 (25°C) =0.235 Kg.m/mm2, and test material 3 (100°C)= 0.255 Kg.m/mm2.
Co-Authors Agustin Nurya Savitri Arie Erza Erlangga Zebua Dian Kurnia Jery Manaor Simarmata Novia Nelza Nurlianna Tarigan Nurul Shadrina Bintang Sorta Lumbantoruan