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Journal : Transmisi

Analysis of The Effect of Fin Thickness Variations on The Decrease in Motorcycle Radiator Temperature Using Computational Fluid Dynamic Saripudin, Mochamad Malik Abdullah; Setiawan, Reza
TRANSMISI Vol. 21 No. 1 (2025): March (2025)
Publisher : Universitas Merdeka Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/jtmt.v21i1.14290

Abstract

The radiator is an important component in a motorcycle cooling system that functions to control engine temperature. The design and thickness of the fins on the radiator play a key role in determining the efficiency of heat transfer and pressure drop in the system. This study analyzes the effect of variations in fin thickness (0.14 mm, 0.17 mm, and 0.19 mm) on radiator performance using the Computational Fluid Dynamics (CFD) method. Simulations were performed at air velocities of 16.7 m/s, 27.8 m/s, and 33.3 m/s, with ethylene glycol coolant at 373 K and ambient air at 300 K. The simulation results show that thinner fin thicknesses, such as 0.14 mm, are more effective in reducing the coolant outlet temperature, with the lowest temperature achieved being 306.091 K. However, thinner fins also produce higher air outlet temperatures. Conversely, a fin thickness of 0.19 mm shows lower heat transfer efficiency, indicated by a higher coolant outlet temperature. The 0.17 mm fin thickness provides the best balance between coolant temperature drop and air outlet temperature, making it the optimal choice for efficient radiator design. With the right radiator design, the efficiency of the cooling system can be improved, which in turn contributes to better engine performance and longer engine life
Effect of Changing The Spring Constant of Continuously Variable Transmission On The Performance of Honda Vario 150 cc Motorcycle Adha, Muhammad Dito; Setiawan, Reza
TRANSMISI Vol. 21 No. 1 (2025): March (2025)
Publisher : Universitas Merdeka Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study analyzes one of the components in the Continuously Variable Transmission (CVT) system, namely the CVT spring. The aim of this research is to determine the power, torque, acceleration, and fuel consumption produced by each different CVT spring. The study utilizes an experimental approach by testing four CVT springs with varying spring constants. Each spring was installed on the vehicle and tested using a dynotest to measure the resulting power, torque, acceleration, and engine speed. Fuel consumption tests were conducted through road testing over short and long distances (10 km to 90 km) with a maximum speed of 75 km/h. The test results indicate that each spring generates a different transmission ratio, which affects the resulting power, torque, acceleration, and fuel consumption. The highest maximum power was achieved when using a CVT spring with 20% stiffness, reaching 11.3 hp at 6493 RPM. The maximum torque was obtained with a 10% stiffer CVT spring, reaching 13.1 Nm at 6042 RPM. The highest acceleration was recorded with a 30% stiffer CVT spring, achieving 8.8 m/s² at a speed of 22 km/h in 0.51 seconds. The most efficient fuel consumption was found with the standard CVT spring, both for short and long distances, achieving 47.6 km/L over a short distance of 10 km and 54.7 km/L over a long distance of 90 km.
Co-Authors Aa Santosa Abbari, Arif Dzaky Abdul Aziz Khalilurrahman Adha, Muhammad Dito Agustian Suseno Alfiansyah, Kevin Amanah, Nadia Andre Gusti Septiyansah Anjani, Ratna Dewi Apid Hapid Maksum Apriani, Wulan Ari Nuswantoro Arif Rachman Arinal, Veri Aripin Aripin Arum, Ardiansyah Astriyani, Erna Azafilmi Hakiim Baihaqi Alfakihuddin, Muhammad Lukman Baihaqi, Ahmad Bijaksana, Arif Bobie Suhendra Boni Sena Bramandhika Augustiantyo Budiman, Achmad Choirunnisa Choirunnisa Daniel Daniel Darmanto, Prihadi Setyo Deri Teguh Santoso Desi Wahyumarniasari Dessy Agustina Sari Destiany, Yulinda Devi Nurfitri Bintang Didiek Pudianto Mubarok Dinar Mutiara Kusumo Nugraheni Dinasti Aprillia Dirja, Iman Doharma, Rouli Elvandari, Milliyantri Enjang Ahmad Juanda Enjang Akhmad Juanda Fahrezi, Muhamnad Widdy Fajrin Koto Farradina Choria Suci Farradina Choria Suci Fatmawaty, A. St Fayyadho, M Thariq Qistan Firdaus, Muhammad Akmal Al František Hrdlička Gusniar, Iwan Nugraha Hakim, Rayhan Hanifi, Rizal Hansyah Faisal Pamekas Harisbaya, Ayu Intan hasyim, hasyim Hrdlička, František Ignatius Soni Kurniawan Ihsan Budiman Iman Dirja Irwansyah Irwansyah Iwan Nugraha Iwan Nugraha Gusniar Iyan Iyan Jajuk Herawati Jojo Sumarjo Jojo Sumarjo Kamilah Pathun Ni'mah Khotib, Ahmad Kusumaningarti, Miladiah Lawolo, Sihnta Gracea Lintang Ratri Prastika Listiyono Lukman Nulhakim Mahardika, Bimo Sakti Marchanda Rahmawati Martin Marno Marno Miftah Maulana Mochtar Zuliyana Mohammad Haikal Abdurraziq Muhamad Rizky Adipratama Muhammad Fahmi Hakim Muhammad Hifzil Alghiffari Muhammad Nur Yasin Nahadi Najmudin Fauji Nanang Burhan Nandang Hisbullah Naubnome, Viktor Nugraha, Iwan Gusniar Nugraha, Rapi Nurhasan Nurhasan Oky Dwi Nurhayati Oleh . Oleh Oleh Oleh, Oleh Pamekas, Hansyah Faisal Pangestu, Luthfi Daffa Paramitha, Dinda Pertiwi, Suciani Rahma Prabowo, Reno Sandi Prihadi Setyo Darmanto Purnawan Purnawan Rahmanda Irawan, Rizky Rahmat Hidayat Rahmat Hidayat Ratih, Nur Rahmanti Richard Julianno Soeganda Rieval Ade Putra Rikky Rifaldy Rio Sandy Rivaldo Giri Saksono Rizal Hanifi Rizal Hanifi Rizki Achmad Darajatun Rizqillah Zaki Ahmadi Rohman, Ibnu Nur Rudy Handoko Rusman Rusman Safitra, Zuhe Saripudin, Mochamad Malik Abdullah Sena, Boni Setaji, Yogi Shinta Dwi Oktaviani Suciani Rahma Pertiwi Sugeng Riyadi Sugeng Riyadi Sugeng Riyadi Sugito Sugito Sukanta Supriyanto Supriyanto Surya Ma’rufi Fajar Sutinnarto Sutrisno Suwandi, Edy Tabayyun, Candan Tasya, Khalisa Aulia Tedi Nurjen Vallerina Lawrencia Tertaroza Vera Pangni Fahriani Wawan Wahyu WILLY RIANSAH Yogi Setaji Zetira, Cinthia Tasyva