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All Journal TEKNIK Jurnal Pendidikan dan Pengajaran Jurnal Pendidikan Teknologi dan Kejuruan JTEV (Jurnal Teknik Elektro dan Vokasional Sainstek Journal of Mechanical Engineering Education (Jurnal Pendidikan Teknik Mesin) JURNAL KEPEMIMPINAN DAN PENGURUSAN SEKOLAH JOIV : International Journal on Informatics Visualization INVOTEK: Jurnal Inovasi Vokasional dan Teknologi Jurnal Penelitian Pendidikan IPA (JPPIPA) JURNAL PENDIDIKAN TAMBUSAI Jurnal Ilmiah Pendidikan dan Pembelajaran Journal of Educational Research and Evaluation Journal on Education JOURNAL OF SCIENCE AND SOCIAL RESEARCH EDUPEDIA JTP - Jurnal Teknologi Pendidikan Jurnal EDUCATIO: Jurnal Pendidikan Indonesia Jurnal Informasi dan Teknologi Journal of Applied Engineering and Technological Science (JAETS) IJECA (International Journal of Education and Curriculum Application) MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Suluah Bendang: Jurnal Ilmiah Pengabdian Kepada Masyarakat Teknomekanik ARSY : Jurnal Aplikasi Riset kepada Masyarakat JPTE: Jurnal Pendidikan Teknik Elektro MSI Transaction on Education Jurnal Sosial dan Teknologi AEEJ : Journal of Automotive Engineering and Vocational Education Jurnal Riset dan Inovasi Pembelajaran Automotive Experiences Jurnal Vokasi Mekanika MASALIQ: Jurnal Pendidikan dan Sains Innovative: Journal Of Social Science Research Journal of Engineering Researcher and Lecturer Ranah Research : Journal of Multidisciplinary Research and Development JTPVI: Jurnal Teknologi dan Pendidikan Vokasi Indonesia Asian Journal of Science, Technology, Engineering, and Art IJIMCE : International Journal of Innovation in Mechanical Construction and Energy The Indonesian Journal of Computer Science IJIS Edu : Indonesian Journal of Integrated Science Education Journal of Golden Generation Education JRTI (Jurnal Riset Tindakan Indonesia)
Remon Lapisa
Universitas Negeri Padang
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Public Health Social Sciences Transportation Other

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Analisis Karakteristik Udara Pendingin Terhadap Kinerja Air Conditioner (AC) Aqilvin Berliansyah; Arwizet Karudin; Refdinal Refdinal; Remon Lapisa
Jurnal Vokasi Mekanika (VoMek) Vol 7 No 1 (2025): Jurnal Vokasi Mekanika
Publisher : Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v7i1.838

Abstract

A stable room temperature is essential for comfort. This study tests the performance of split wall air conditioners with R-22 refrigerant and evaluates how to improve their efficiency through the influence of cooling air temperature. The experiment was carried out by varying the air temperature and cooling load using a heater. Data is taken every 15 minutes for 2 hours using a digital thermometer. The results showed that the maximum coefficient of performance (COP) value reached 8 indoors and 7.2 outdoors. Meanwhile, the maximum energy efficiency ratio (EER) value was recorded at 4.2 indoors and 3.7 outdoors. The stability of COP and EER values indicates that the Split Air Conditioner can operate efficiently despite variations in air temperature and cooling load. Cooler cooling air proved to be crucial in improving system efficiency. Conversely, higher refrigerant loads tend to decrease efficiency. However, this drop can be minimized by keeping the cooling air temperature low. The selection of the appropriate refrigerant, such as R-22, also plays an important role in supporting optimal performance. The combination of cooler cooling air and the right refrigerant allows the split air conditioner to operate with high efficiency. This research provides an important basis for the development of energy-efficient and efficient cooling systems. Optimizing the temperature of the cooling air is one of the main keys in improving the efficiency of the cooling system. With the right approach, split air conditioners can be used more effectively to create thermal comfort while saving energy.
Design and Crash Test on a Two-Passenger City Car Frame using Finite Element Method Randi Purnama Putra; Dori Yuvenda; Wanda Afnison; Remon Lapisa; Milana Milana; Anna Niska Fauza; Dani Harmanto
Automotive Experiences Vol. 7 No. 2 (2024)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.11306

Abstract

The chassis is an important part of a car which must have a strong construction to withstand the weight of the vehicle. The purpose of this research is to create a city car's chassis that can hold two passengers and then crash-test the finished product. In this research, a development method was used using SolidWorks software and the student version of ANSYS R2 2023 as software for creating chassis designs and crash test simulations. The study's findings indicate that the car frame's measurements are 2.46 meters in length, 1.33 meters in height, and 1.39 meters in width. The steel of the ASTM A36 type was utilized as the material in the computational study of the frame. The results show that increasing speed causes an increase in deformation, with the peak deformation at a speed of 100 km/h. The maximum deformation occurs at 0.007 seconds with a value of 203.51 mm at the top pillar of the car. The deformation increases from 97.196 mm at 0.0035 s to 161.22 mm at 0.0056 s. However, deformation occurs mainly in the front zone of the car frame and is not significant in the passenger zone.
Aerodynamic Approach to Two-Passenger City Car Design: A Study of Square Back and Compact Shapes Randi Purnama Putra; Dori Yuvenda; Remon Lapisa; Wanda Afnison; Milana Milana; M. Yasep Setiawan; Ahmad Arif; Dani Harmanto
Automotive Experiences Vol. 8 No. 2 (2025)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.13686

Abstract

The development of lightweight electric cars for urban mobility requires efficient aerodynamic design without sacrificing space efficiency. This study presents a novel method by investigating the combination of a two-seater city car's compact dimensions and square back shape, which has not been extensively researched for low- to medium-velocity vehicles. This study's objective is to assess the design's aerodynamic performance using numerical simulations using the Computational Fluid Dynamics (CFD) approach. The vehicle model is designed with a compact body and square back, which is commonly used in small vehicles with high maneuverability requirements. The simulations are conducted at three different air velocity levels: 10, 20, and 30 m/s. The results of the study showed an increase in the value of the drag coefficient (Cd) along with an increase in flow velocity. At a velocity of 10 m/s, the Cd value was recorded at 0.4536. When the velocity increased to 20 m/s, the drag coefficient increased slightly to 0.4563. Further increases in velocity to 30 m/s resulted in a Cd value of 0.4581. This Cd value shows the consistency of aerodynamic performance with increasing velocity, with fluctuations that remain within the efficiency limits of lightweight vehicles. The pressure distribution contour shows high-pressure accumulation at the front and low pressure at the rear of the vehicle, which generates large turbulent wakes in the rear area and contributes to increased drag. These findings indicate that the square rear body design faces significant aerodynamic challenges. Therefore, design strategies such as adding a rear spoiler, using a rear diffuser, and optimizing the rear body angle are suggested as potential solutions to improve flow efficiency.
Co-Authors - Primawati A G Halim A, Esa Hafizul Abbas, Muhammad Rabiu Abdul Aziz Abdullah, Adlan Azmi Abdullah, MT, Dr. Rijal Ade Afriadi AR Afif Rahman Riyanda Agus Sukandi Ahmad Arif Aldio, Muhammad Fikhri Alex Firstson Kurniawan Alfarizi, Aldi Ambiyar, Ambiyar Ameliza, Kiki Ananda, Opi Andre Kurniawan Andre Kurniawan Andre Kurniawan Andri Septiandes Anna Niska Fauza Anugrah, Pinto Aprianto, Anggi Aprizal Saputra Aqilvin Berliansyah Arafat, Andril Arda Yunianta Arfianti, Fina Armaliany, Telvi Arnas Arnas, Arnas Arwizet Arwizet K Arwizet Arwizet, Arwizet Asnil Asnil Asnil Asnil Asnil Asnil Azhari, Nevil Bahrul Amin Bambang Sudarmanta Beni Giovani Budi Syahri Bulkia Rahim Candra Surya Candra, Oriza Dani Harmanto Dani Harmanto Delima Yanti Sari Delsina Faiza Denda Afri Juliadi Desmarita Leni Devega, Army Trilidia Devianto, Dodi Dimas Riadi Dirgantara, Septa Zela Donny Fernandez Dori Yuvenda Dwi Sudarno Putra Dwiprima Elvanny Myori, Dwiprima Elvanny Eko Indrawan Endri Rizki Anugrah Endrika Wahidri Enjang Suhaedin Erzeddin Alwi Evenda, Devi Fadhilah Fadhilah Fadhilla Azherda Fadlul Amdhi Yul, Fadlul Amdhi Fahmi Rizal Fahrendra, Aqsal Fajar Riyaddi fajar fajar, Fajar Riyaddi Faris Afif Fauza, Anna Niska Fauzun, Hudri Fazrol Rozi Febri Prasetya Febri Silvia Febrian, Muhammad Ivan Firdaus Firdaus Firmansyah, Gusri Fivia Eliza Ganefri . Giatman, M Gusni Sushanti H H, Tiara Klaudia Habibie Habibie Hadiastuti, Hadiastuti Halmadid, Muhammad Habib Hamizum, Bestra Hansi Effendi Hariyadi, Hariyadi Hasan Maksum Hasanuddin WS Hendra Dani Saputra Hendri Nurdin Herasmus, Hilda Huda, Yasdinul Ilham Zikri Indah Rahmatika Sari Indah Indah, Indah Rahmatika Sari Iqrha, Muhammad Irma Husnaini Irma Yulia Basri Irzal Irzal Irzal, Irzal Jamaludin Jamaludin Jasman Jasman Jasman Juli Sardi Junil Adri Krismadinata Krismadinata Krismadinata Krismadinata Krismadinata Krismadinata, Krismadinata Kurnia Wahyu Prima Kurniawan, Alex Firstson kusuma, Yuda Perdana Larisang Lasyatta Syaifullah M. Afdal M. Natsir M. Yasep Setiawan M. Yasep Setiawan M.Y. Setiawan Martias Martias Milana Milana Milana Milana Muhamad Fadel Pratama Muhammad Azim Muhammad Djoni Bustan Muhammad Elfin Muhammad Lathif Mahendra Muhammad Rizki Anshari Muhammad, Maghfiridhani Muji Setiyo Mulianti Mulya, Hasan Sayuti Muslim Muslim Nanang Qosim Nasruddin Nasruddin Nengka Putri Nevil Azhari Niko Adima Brawira Nofri Helmi, Nofri Nurdin Hendri Nurmansyah, Ridho Nuzul Hidayat, Nuzul Oki Muraza Prayoga, Ongki Primandari, Sri Riski Putri Primawati Primawati Primawati Primawati Purwanto, Wawan Purwantono Purwantono purwantono purwantono Purwantono, Purwantono Putra, Ilma Putra, Meiyaldi Eka Putra, Randi Purnama Putra, Rido Putra, Rusnardi Rahmat Putri, Prima Yane Rahadian Zainul Rahman, Haolia Rahmat Afdhol Rahmiati Rama, Alzet Refdinal Refdinal Refdinal, Refdinal Refdinal, Refdinal Retno Wahyudi Rifdarmon, Rifdarmon Rifelino Rifelino Rizki Vananda Rizky Ema Wulansari Robby Mulya SABRINA, ELSA Sabtu, Sabtu Saputra, Firman Omni Silvia, Febri Simon, Ryan Ananda Sinukaban, Veronica Yulisna Sisrayanti Siswahyudianto Soretire Lanrewaju Kamorudeen Sri Haryati Sri Rizki Putri Primandari Sukardi, Sukardi Sundhy Pareza Suparno Suparno Supriadi Supriadi Supriadi Supriadi Syafrianto Syafrianto Syahril Syahril Tambunan, Gerry Lyman Tarig Elshaarani Tiara Klaudia H H Toto Sugiarto Totoh Andayono Unung Verawardina, Unung Wakhid, Wakhinuddin Wakhinuddin Wakhinuddin, Wakhinuddin Wanda Afnison Waskita Waskita Waskito Waskito Waskito, Waskito Wike Oriza Wildy, Fadhlan Wirdianto, Eri Wulansari, Rizky Ema Yandra, Muvi Yanuar, Ferra Yasdinul Huda Yelfianhar, Ichwan Yolli Fernanda Yubarda, M.Kom, Erliza Yuberta, Andre Yudi Star Novsky Yufrizal Yufrizal, Yufrizal Yus Donald Chaniago Zainal Abadi Zulbadri Zulbadri