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All Journal Jurnal Teknik Mesin Jurnal Rekayasa Energi dan Mekanika
Pandriana, Aap
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Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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STUDY OF FINITE DIFFERENCE METHOD IN HEAT FLOW SIMULATION OF TWO-CHAMBER THERMOS SEPARATOR MADE OF POLYPROPYLENE USING MATLAB APPLICATIONS Pandriana, Aap; Pudjiwati, Sri; Alva, Sagir; Tarigan, Kontan; Sudarma, Andi Firdaus; Khaerudini, Deni Shidqi
Jurnal Teknik Mesin (Journal Of Mechanical Engineering) Vol 13, No 2 (2024)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/jtm.v13i2.27803

Abstract

Heat transfer can be defined as transfer of energy from one area to another as a result of temperature differences in objects. This indicates heat transfer not only explains how heat energy is transferred from one object to another, but can also predict the rate of heat transfer that occurs under certain conditions. In this case, what is related to the heat flow model equation is two-chamber thermos separator where the separator is made of polypropylene. This separator functions to prevent the flow of heat from one side to the other side of the thermos tube. Polypropylene is included in the insulator category, although heat transfer still occurs. The heat transfer will be calculated using the finite difference method in parabolic partial differential equations using the Matlab application. The heat transfer process is assumed to occur by conduction, with a separator length of 1 cm. Assume the first side of the divider has a right temperature of 100°c, and the other side 20°c. The temperature point measured on the separator is located in the center of the separator. After completing the solution using the Matlab application with the finite difference method, a heat transfer flow simulation was obtained in the two-chamber thermos separator which shows the heat flow transfer at any time. At 0.1 seconds the temperature at T1 is 2.4°c, while at 10 seconds  is 65.9704°c. Then at 0.1 seconds the temperature at T4 is 0.48°c, while at 10 seconds 19.5436°c. The conclusion is in the separator of the two-chamber thermos there is significant heat flow from the side of the first tube to the other side.
Pengaruh Variasi Densitas Resin PVC terhadap Koefisien Gesek dan Mikrostruktur Komposit Kampas Rem Berbasis Serat Sabut Kelapa dan Serbuk Arang Pandriana, Aap; Alva, Sagir; Noviyanto, Alfian; Kurniawan, Kurniawan
Jurnal Rekayasa Energi dan Mekanika Vol 5, No 1 (2025): JREM
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/JREM.v5i1.50

Abstract

Penelitian ini bertujuan mengembangkan kampas rem ramah lingkungan berbahan komposit dengan menggunakan serat sabut kelapa sebagai penguat, serbuk arang batok kelapa sebagai pengisi, dan resin polivinil klorida (PVC) sebagai matriks. Proses pembuatan komposit dilakukan melalui metode hot press pada suhu 180 °C dan tekanan 7 MPa. Variasi resin PVC diperoleh dari perbedaan rasio pelarut cyclohexanone terhadap serbuk PVC, yaitu G01 (1,036 g/ml), G02 (1,069 g/ml), dan G03 (1,136 g/ml). Pengujian yang dilakukan meliputi pengukuran massa jenis, koefisien gesek, serta pengamatan struktur mikro menggunakan mikroskop optik. Hasil menunjukkan bahwa meningkatnya densitas resin sebanding dengan peningkatan massa jenis dan nilai koefisien gesek komposit. Spesimen G03 dengan densitas resin tertinggi menghasilkan nilai koefisien gesek tertinggi, yaitu 0,19. Hal ini menunjukkan bahwa kekuatan ikatan antar material semakin baik seiring peningkatan kandungan resin. Pengamatan struktur mikro memperlihatkan bahwa resin PVC lebih merata dan menyelimuti serat dengan lebih baik pada spesimen G03, yang mengindikasikan distribusi material yang lebih homogen dan ikatan antar fase yang lebih kuat. Hasil pengujian menunjukkan bahwa koefisien gesek meningkat seiring dengan peningkatan kandungan resin dan spesimen komposit G03 masuk dalam standar SAE J661-1997. (0,14–0,27), kondisi ini diduga disebabkan oleh pengujian yang dilakukan pada temperatur rendah. Secara keseluruhan, komposit ini memiliki potensi untuk digunakan sebagai kampas rem non-asbes yang aman, ringan, dan memiliki sifat mekanik serta mikrostruktur yang mendukung performa pengereman yang baik.
Co-Authors Alfian Noviyanto Andi Firdaus Sudarma Deni Shidqi Khaerudini Kurniawan Kurniawan Pudjiwati, Sri Sagir Alva Tarigan, Kontan