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All Journal Jurnal Energi Dan Manufaktur Turbo : Jurnal Program Studi Teknik Mesin Logic : Jurnal Rancang Bangun dan Teknologi Jurnal Pendidikan Teknik Mesin Undiksha JURPIKAT (Jurnal Pengabdian Kepada Masyarakat) Eksergi: Jurnal Teknik Energi Formosa Journal of Science and Technology (FJST) Jurnal Teknik Mesin, Industri, Elektro dan Informatika Journal of Creative Student Research Jurnal Teknik Mesin Venus: Jurnal Publikasi Rumpun Ilmu Teknik Mars: Jurnal Teknik Mesin, Industri, Elektro dan Ilmu Komputer KOMET
Ahmad Hanif Firdaus
Politeknik Negeri Malang
Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Dentistry Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mechanical Engineering Public Health Social Sciences Transportation

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PENGARUH PANJANG PIPA KATALIS HYDROCARBON CRACK SYSTEM TERHADAP EMISI GAS BUANG : EFFECT OF HYDROCARBON CRACK SYSTEM CATALYST PIPE LENGTH ON EXHAUST GAS EMISSIONS Ahmed Sabili Gifari; Ahmad Hanif Firdaus
Jurnal Teknik Mesin Vol. 3 No. 2 (2024): JURNAL TEKNIK MESIN
Publisher : Program Studi Teknik Mesin PSDKU Polinema Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/j-meeg.v3i2.5551

Abstract

Exhaust emissions are pollutants that pollute the air caused by exhaust gases from motor vehicles. The purpose of this study is to determine the results of the effect of catalyst pipe length on the Hydrocarbon Crack System on exhaust emissions of four-cylinder gasoline motorcycles. The research method uses experimental method to analyze the Hydrocarbon Crack System tool. The results showed that variations in catalyst pipe length had an effect on reducing exhaust emissions. The test results showed the highest HC reduction of 29.7% in the 200mm catalyst length variation at 2000rpm rotation, and the highest CO reduction of 4.3% in the 20mm catalyst pipe length variation at 3000rpm rotation    
Pengaruh Variasi Panjang Velocity Stack Terhadap Daya Motor Bensin Satu Silinder 150 CC Zaidan Almeyda; Ahmad Hanif Firdaus
Journal of Creative Student Research Vol. 2 No. 3 (2024): Juni : Journal of Creative Student Research
Publisher : Pusat Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jcsr-politama.v2i3.3927

Abstract

The automotive industry is growing rapidly, especially on 150 cc motorcycles. Problems related to lack of engine performance are the main focus in making modifications. Velocity stack in standard conditions is an air duct that connects the throttle body with the air filter box. The standard velocity stack is made of rubber so that it can be deformed when the vacuum is high and the shape has a curve so that it can inhibit airflow. Manufacturers make velocity stacks with consideration of their short length in order to produce optimal engine performance. The purpose of this study was to determine the effect of variations in stack velocity length on the power of a 150 CC single-cylinder gasoline motor. The independent variable in this study was the variation in velocity stack length of 90 mm (standard), 110 mm, 70 mm, and 50 mm. The variables tied to this study were power, specific fuel consumption, and exhaust emissions. The control variable in this study was fuel with 98 octane. The power test method uses a dyno test tool and a velocity stack with a length of 70 mm produces 15.82 Hp (0.42 Hp higher) than when using a 90 mm velocity stack (standard) of 15.4 Hp at 8000 rpm engine speed.
Pengaruh Kalium Hidroksida Terhadap Emisi Gas Buang Motor Bensin Berbahan Bakar Biogas Firdaus, Ahmad Hanif; Monasari, Ratna; Qosim, Nanang; Astuti, Fina Andika Frida
Jurnal Pendidikan Teknik Mesin Undiksha Vol. 9 No. 1 (2021)
Publisher : UNIVERSITAS PENDIDIKAN GANESHA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jptm.v9i1.31545

Abstract

Kebutuhan alat transportasi menjadi sesuatu hal yang sangat penting untuk mendukung peningkatan mobilitas orang, barang, dan jasa di era globalisasi seperti saat ini. Penggunaan alat transportasi berbasis motor bakar dengan bahan bakar fosil sebagai sumber energi utama memberi dampak yang sangat serius jika dibiarkan. Bahan bakar fosil adalah energi tak terbarukan yang jumlahnya di alam pun semakin menipis yang suatu saat akan habis dan jika digunakan dapat menghasilkan emisi gas buang yang dapat merugikan kesehatan dan lingkungan. Saat ini terdapat perkembangan yang cukup signifikan dalam usaha menciptakan dan menemukan bahan bakar alternatif, biogas menjadi salah satunya. Namun, biogas murni yang dihasilkan masih banyak mengandung zat pengotor yang menganggu dalam proses pembakaran sehingga perlu dilakukan pemurnian. Salah satu teknik pemurnian biogas adalah dengan menggunakan larutan Kalium Hidroksida (KOH). Penelitian ini bertujuan untuk mengetahui efek kalium hidroksida terhadap emisi gas buang mesin bensin berbahan bakar biogas. Metode yang digunakan dengan eksperimen secara langsung. Variabel bebas dalam penelitian ini adalah variasi konsentrasi Kalium Hidroksida (KOH) sebesar 5 M, 10 M, dan 15 M pada putaran mesin 5500, 5700, 5900, 6100, 6300 dan 6500 rpm. Variabel terkontrolnya bukaan throttle 100%, waktu pengapian 39° sebelum TMA (Titik Mati Atas) dan laju alir KOH 1 ml/s, variable terikatnya adalah emisi gas buang CO dan HC. Dari hasil penelitian diketahui bahwa semakin besar konsentrasi KOH yang ditambahkan akan menghasilkan emisi gas buang yang minimal, yaitu pada penambahan KOH dengan konsentrasi 15 M yang menghasilkan emisi gas buang CO sebesar 0,237 (% vol) dan HC 84 (ppm vol).Kata kunci: Biogas; Emisi; Kalium Hidroksida; Mesin Bensin.The use of engine-fuel-based transportation with fossil fuels as the main energy source has a very serious impact. Fossil fuels are non-renewable energy whose numbers in nature are depleting which one day it will run out and if used can produce exhaust gas emissions that can harm health and the environment. Currently there are significant developments in the effort to create and find alternative fuels, biogas being one of them. However, the pure biogas produced still contains many impurities that interfere with the combustion process so that it needs to be purified. One of the biogas purification techniques is by using a solution of potassium hydroxide (KOH). This study aims to determine the effect of KOH on the exhaust gas emissions of biogas fueled otto engines. The method using direct experimentation, independent variable were the variation in the concentration KOH of 5 M, 10 M, and 15 M at engine speed of 5500, 5700, 5900, 6100, 6300 and 6500 rpm. The controlled variables were 100% throttle opening, the ignition time was 39 ° before TDC (Top Dead Centre) and the KOH flow rate was 1 ml / s, the dependent variables were the exhaust emissions of CO and HC. From the results, it is known that the greater the KOH concentration added will produce minimal exhaust gas emissions, namely the addition of KOH with a concentration of 15 M which results in CO exhaust emissions of 0.237 (vol%) and HC 84 (ppm vol). Keywords : Biogas; Emission; Potassium Hydroxide, Otto Engine. DAFTAR RUJUKANAbdussalam., Fernandez, D., & Lapisa, R. (2018). Penggunaan biogas sebagai bahan bakar alternatif pada mesin generator set multi equipment (Me) 1800. Automotive Engineering Education Journals, 2(2), 1-7.Ardhiany, S. (2018). Proses absorbsi gas CO2 dalam biogas menggunakan alat absorber tipe packing dengan analisa pengaruh laju alir absorben NaOH. Jurnal Teknik Patra Akademika, 9(2), 55-65.Fahmayanti, Y., & Abtokhi, A. (2018). The addition effect of NaOH and KOH toward biogas purification. Jurnal Neutrino: Jurnal Fisika dan Aplikasinya, 10(2), 40-44.Hardianto, A., & Hermawan, D. (2019). Pengaruh filterisasi bertingkat larutan KOH, NaOH dan TEA terhadap penurunan prosentase CO2 pada biogas. Jurnal Flywheel, 10(1), 43-54.Hermawan, D., Hamidi, N., & Sasongko, M. N. (2016). Performansi purifikasi biogas dengan KOH based absorbent. Jurnal Rekayasa Mesin, 7(2), 65-73.Hery, A. F., Septiropa, Z., Riansyah, S., & Romadhi, F. (2011). Pemanfaatan biogas/landfillgas sebagai bahan bakar mesin bensin 1 silinder 4 langkah. Jurnal Teknik Industri, 12(2) 162-168.Nurdin, A., & Aries, D. (2018). Review aplikasi bahan bakar biogas pada motor bakar SI (spark ignition). Jurnal SIMETRIS, 9(2), 797-802.Prastya, R., Susilo, B., & Lutfi, M. (2013). Pengaruh penggunaan bahan bakar biogas terhadap emisi gas buang mesin generator set. Jurnal Keteknikan Pertanian Tropis dan Biosistem, 1(2), 77-84.Prihutama, F. A., Firmansyah, D. N., Siahaan, K. S. H., & Fahmi, B. (2017). Pemanfaatan biogas sebagai energi alternatif ramah lingkungan daerah Desa Monggol, Kabupaten Gunungkidul, Yogyakarta. SNITT-Politeknik Negeri Balikpapan, 87-95.Rao, A. B. & Rubin, E. S. (2002). A technical, economic and environmental assessment of amine based carbon capture technology for power plant greenhouse gas control. Environmental Science & Technology, 36(20), 4467-4475Ritonga, A. M., & Masrukhi. (2017). Optimasi kandungan metana (CH4) biogas kotoran sapi menggunakan berbagai jenis adsorben. Jurnal Rona Teknik Pertanian, 10(2), 8-17.Ritonga, A. M., Masrukhi., & Kusmayadi, R. P. (2020). Pemurnian biogas metode adsorpsi menggunakan down-up purifier dengan arang aktif dan silika gel sebagai adsorben. Journal of Agricultural and Biosystem Engineering Research, 1(1), 72-80.Sunaryo. (2014). Uji eksperimen pemurnian biogas sebagai pengganti bahan bakar motor bensin. Jurnal PPKM II, 123-130.Suputra, I. M. T., Nindhia, T. T., & Surata, W. (2017). Pemurnian biogas dari gas pengotor CO2 menggunakan campuran kalium hidroksida padat dengan sekam padi. Jurnal Ilmiah Teknik Desain Mekanika, 6(3), 272-275.Sutanto, R., Alit, I. B., & Rezeki, G. (2016). Pengaruh absorsi gas CO2 dan H2S dalam biogas menggunakan pasta batu apung terhadap peningkatan unjuk kerja motor bakar. Jurnal Dinamika Teknik Mesin, 6(1), 31-37.Suyatno A., & Hermawan, D. (2016). Analisis campuran KOH dan H2O terhadap proses penyerapan CO2 pada biogas hasil ternak dan biogas hasil tempat pembuangan sampah (TPS). Jurnal Widya Teknika, 24(1), 1-5.Van Bhat, R. D., Kuipers, J.A M. & Versteeg, G. F. (2000). Mass transfer with complex chemical reactions in gas-liquid system: two step reversible reactions with unit stoichiometric and kinetic order. Chemical Engineering Journal, 76(2), 127-152.
Pengaruh Penambahan Zat Aditif Pada Campuran Bahan Bakar Bensin – Bioethanol Terhadap Specific Fuel Consumption Monasari, Ratna; Firdaus, Ahmad Hanif; Qosim, Nanang
Jurnal Pendidikan Teknik Mesin Undiksha Vol. 9 No. 1 (2021)
Publisher : UNIVERSITAS PENDIDIKAN GANESHA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jptm.v9i1.31797

Abstract

Pemanfaatan energi terbarukan di Indonesia masih tergolong rendah dibandingkan dengan sumber energi tak terbarukan dari minyak bumi, batu bara, maupun gas alam. Dengan jumlah energi tak terbarukan yang terbatas mendorong untuk mengembangkan penggunaan bahan bakar alternatif. Saat ini bioetanol merupakan salah satu bahan bakar alternatif yang sedang dikembangkan sebagai pengganti maupun campuran bahan bakar bensin, yang dikenal sebagai etanol anhidrat yang memiliki konsentrasi diatas 96%. Campuran bioetanol memberikan pengaruh terhadap peningkatan bilangan oktan dan mampu mengurangi emisi gas buang yang dihasilkan. Untuk mendapatkan efek yang lebih optimal dalam konsumsi bahan bakar zat aditif seperti oxygenated cyclohexanol ditambahkan pada campuran bahan bakar. Studi dilakukan pada perbandingan bahan bakar E5 sampai E15 dengan penggunaan aditif tersebut. Pengujian konsumsi bahan bakar dilakukan pada mesin satu silinder spark ignition dengan posisi bukaan throttle 100%. Terdapat sensor pada bagian tanki bahan bakar untuk menghitung specific fuel consumption (SFC) dengan variasi kecepatan mesin. Penelitian ini bertujuan untuk melihat pengaruh penambahan zat aditif pada campuran bahan bakar terhadap konsumsi bahan bakar.Kata kunci: bensin; bioetanol; emisi gas buang; zat aditif.The use of renewable energy in Indonesia is still low compared to non-renewable energy sources from petroleum, coal, and natural gas. The limited amount of non-renewable energy encourages developing the use of alternative fuels. Currently, bioethanol is an alternative fuel that is being developed as a substitute or mixture of gasoline fuel, known as anhydrous ethanol which has a concentration above 96%. The bioethanol mixture has an effect on increasing the octane number and is able to reduce the resulting exhaust gas emissions. To get a more optimal effect on fuel consumption, additives such as oxygenated cyclohexanol are added to the fuel mixture. Studies were carried out on the comparison of fuel E5 to E15 with the use of these additives. The fuel consumption test was carried out on a single-cylinder spark-ignition engine with a 100% throttle opening position. There is a sensor on the fuel tank to calculate the specific fuel consumption (SFC) with variations in engine speed. This study aims to determine the effect of adding additives to the fuel mixture on fuel consumption.Keywords : fuel; bioethanol; exhaust gas emissions; additives. DAFTAR RUJUKANAbikusna, S., Sugiarto, B., & Suntoro D. (2017). Low Grade Bioethanol for Fuel Mixing on Gasoline Engine Using Distillation Process. in AIP Conference Proceedings. AIP Publishing.Abikusna, S. (2018). The Effect of Additive on Combustion Characteristics and Cycle to Cycle Variations on SI Engine Fueled by Gasoline and Bioethanol, Technology organic and inorganic substances. P. 27-37. Doi: 10.15587/1729-4061.2018.147585Abikusna, S., B. Sugiarto, & Zulfan, A. (2017). Fuel consumption and emission on fuel mixer low-grade bioethanol fuelled motorcycle. in MATEC Web of Conferences. EDP Sciences.Costa, R. C., &  Sodré, J.R.  (2011). Compression ratio effects on an ethanol/gasoline fuelled engine performance. Applied Thermal Engineering, 31(2): p. 278-283.de Melo, T.C.C., et al., 2012. Hydrous ethanol–gasoline blends–Combustion and emission investigations on a Flex-Fuel engine. Fuel, 97: p. 796-804.Costa, R.C. & Sodré, J.R. (2009) . Hydrous Ethanol Vs. Gasoline-Ethanol Blend: Engine Performance and Emissions. International Journal of FuelGao, J. D. J., &  Huang, Z. (2007). Spray Properties of Alternative Fuels: A Comparative Analysis of Ethanol–Gasoline Blends and Gasoline. Fuel. 86(10): p. 1645-1650.Keith, O., & Trevor, C. (1995). Automotive fuels reference book. Society of Automotive Engineers, Inc. Warrendale,  p. 487.Gholamhassan, N. B. G., Yusaf, T. Safieddin, S. M., & Ardebili, R.M. (2015). Optimization of performance and exhaust emission parameters of a SI (spark ignition) engine with gasoline-ethanol blended fuels using response surface methodology. Elsevier, energy xxx: p. 15.Jang, S. H., & Choi, J. H. (2016). Comparison of fuel consumption and emission characteristics of various marine heavy fuel additives. Applied Energy, 179, 36–44. https://doi.org/10.1016/j.apenergy.2016.06.122Monasari, R., Abikusna, S., Sugiarto, B., & Ajiseno, B. (2018). IOP Conference Series: Earth and Environmental Science Analysis of emission gas and fuel consumption on SI engine fueled with low-grade bioethanol and oxygenated cycloheptanol additive Analysis of emission gas and fuel consumption on SI engine fueled with low-grade bioethanol and oxygenated cycloheptanol additive. 105, 12058. https://doi.org/10.1088/1755-1315/105/1/012058Srinivasan, C. A., &  Saravanan, C. (2010). Study of Combustion Characteristics of an SI Engine Fuelled with Ethanol and Oxygenated Fuel Additives. Journal of Sustainable Energy & Environment. 1(2): p. 85-91.Sugiarto, B. (2002) Motor Pembakaran Dalam. Jakarta: Universitas Indonesia. ISBN 979- 97726-7-2.Thangavelu, S. K., Ahmed, A. S., & Ani, F. N. (2016). Review on Bioethanol as Alternative Fuel for Spark Ignition Engines. Renewable and Sustainable Energy Reviews. 56: p. 820-835Zhao, L., Wang, X., Wang, D., & Su, X. (2020). Investigation of the effects of lean mixtures on combustion and particulate emissions in a DISI engine fueled with bioethanol-gasoline blends. Fuel, 260, 116096. https://doi.org/10.1016/j.fuel.2019.116096
Pengaruh Komposisi dan Lipatan Filter Udara Biokomposit Berbahan Ampas Tebu dan Sekam Padi terhadap Performa Mesin 4 Langkah 150cc Muhammad Daniar Hidayat; Purwoko Purwoko; Ahmad Hanif Firdaus; Ratna Monasari
Mars : Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer Vol. 3 No. 3 (2025): Juni : Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer
Publisher : Asosiasi Riset Teknik Elektro dan Informatika Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/mars.v3i3.863

Abstract

Internal combustion engines generate thermal energy through the combustion of an air-fuel mixture. The incoming air must be filtered, as it contains impurities and particles. While air filters are commonly made from paper, they can also be developed using organic waste materials such as sugarcane bagasse and rice husk. This study aims to analyze the effect of biocomposite air filters on engine power, torque, and specific fuel consumption (SFC), by varying the material composition and the number of pleats, and comparing the results with those of a standard air filter. The method used is a quantitative experimental approach involving dyno testing on a 150 cc motorcycle engine. The tested material compositions include 50:50, 40:60, 30:70, 60:40, and 70:30 (sugarcane bagasse\:rice husk), with pleat counts of 28, 26, and 24. Results showed that the biocomposite filter with 28 pleats and a 30:70 composition delivered the best performance, producing 18.47 Hp and 16.66 Nm of torque—higher than the standard filter’s 17.98 Hp and 15.52 Nm. In terms of fuel efficiency, the 26-pleat filter with a 50:50 composition recorded the lowest SFC at 41.90 g/kWh, significantly better than the standard filter’s 53.03 g/kWh. Conversely, the 60:40 composition resulted in the highest SFC due to increased airflow resistance.
Pengaruh Sudut Drive Pulley dan Massa Roller terhadap Daya dan Tingkat Kebisingan pada Sepeda Motor Bertransmisi Otomatis 110cc Bagus Irawan; Purwoko Purwoko; Ratna Monasari; Ahmad Hanif Firdaus
Venus: Jurnal Publikasi Rumpun Ilmu Teknik  Vol. 3 No. 3 (2025): Venus: Jurnal Publikasi Rumpun Ilmu Teknik
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/venus.v3i3.935

Abstract

Automatic transmission motorcycles, especially those with 110cc engines, are increasingly in demand by the public because of their practicality. The performance of this motorcycle is greatly influenced by the transmission system, especially the Drive pulley and Roller components. The correct setting of the Drive pulley angle and Roller mass can improve engine performance and reduce noise, thus supporting driving comfort. This study aims to analyze the effect of variations in the Drive pulley angle and Roller mass on engine performance, in terms of power (HP), torque (Nm), and noise level (dB) at several engine speeds. The variations tested include the Drive pulley angle of 13.5°–14° and the Roller mass of 13–15 grams, with testing at 5000, 6000, 7000, and 8000 RPM. The test results show that the combination of the angle and Roller mass affects engine performance. At 5000 RPM, the combination of the 14° angle and 15 gram Roller produces the highest power, torque, and noise. At 6000 RPM, the combination of 13.8° and 13 grams produces a maximum power of 6.86 HP and 8.15 Nm of torque, with a noise of 97.40 dB. While at 7000–8000 RPM, the combination of 13.5° and 15 grams provides the best performance with 7.10 HP and 6.30 Nm of torque, accompanied by a noise of 104.17 dB. In general, increasing the angle and mass of the Roller increases performance, but is followed by an increase in noise.
ANALISIS PERBEDAAN OVERLAP CAMSHAFT DURATION TERHADAP DAYA DAN TORSI SEPEDA MOTOR SATU SILINDER 110 CC: ANALYSIS OF THE DIFFERENCES OVERLAP CAMSHAFT DURATION ON POWER 110 CC ONE CYLINDER MOTORCYCLE Nurfirmansyah, Muhammad; Ahmad Hanif Firdaus
Jurnal Teknik Mesin Vol. 4 No. 1 (2025): JURNAL TEKNIK MESIN
Publisher : Program Studi Teknik Mesin PSDKU Polinema Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/j-meeg.v4i1.5550

Abstract

The decline in performance of a vehicle that has been used for a long time makes it less comfortable when used. The aim of this research is to determine the results of the effect of camshaft overlap duration on the power of a 110 cc petrol engine. To verify its performance, experimental research methods were used in this thesis research. The research results show that varying the duration of camshaft overlap has the effect of increasing vehicle power. For example, using a variation of the camshaft overlap duration of 38o produces the highest power with 7.45 (Hp) at an engine speed of 7000 rpm. This can happen because according to the theory that the greater the duration of the camshaft overlap on a vehicle, the better the flushing of the combustion chamber at top speed.
Karakterisasi Konsumsi Energi Motor Bldc terhadap Beban Dinamis pada Kendaraan Listrik Hibrida Wijaya Putra; Supa Kusuma Aji; Septyana Riskitasari; Ahmad Hanif Firdaus
Mars : Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer Vol. 3 No. 4 (2025): Agustus : Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer
Publisher : Asosiasi Riset Teknik Elektro dan Informatika Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/mars.v3i4.959

Abstract

The rapid growth of motor vehicles, exceeding 169 million units in Indonesia by 2025, highlights the urgent need for energy-efficient and environmentally friendly transportation solutions, such as hybrid vehicles. Brushless Direct Current (BLDC) motors are crucial components in these systems due to their high efficiency and compact design, particularly when directly integrated into wheels. This study specifically aims to analyze the impact of varying loads on the power consumption of a BLDC motor within a front-wheel-drive hybrid motorcycle prototype equipped with a Continuously Variable Transmission (CVT) system. Experimental data was collected using a wattmeter on a prototype subjected to different passenger loads: 55 kg, 75 kg, and 100 kg, at constant speeds of 20 and 40 km/h. The findings consistently show that an increase in load significantly and positively correlates with higher power consumption of the BLDC motor. For instance, at 40 km/h, power consumption for a 100 kg load reached 729.578 Watt, whereas for a 55 kg load it was 649.605 Watt. This demonstrates that greater effort (power) is required from the motor to overcome the inertia and increased resistance associated with heavier loads. These results contribute to optimizing energy efficiency in hybrid vehicle design and underscore the importance of load management for sustainable transportation.
ANALISIS VARIASI TINGGI DAN JARAK ANTAR SIRIP TERHADAP KINERJA HEAT PIPE Fachrudin, Arif Rochman; Frida, Fina Andika; Firdaus, Ahmad Hanif
Eksergi Vol. 17 No. 3 (2021): SEPTEMBER 2021
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (484.894 KB) | DOI: 10.32497/eksergi.v17i3.2974

Abstract

Heat pipe merupakan alat penukar kalor yang mampu memindahkan sejumlah panas dari evaporator dan dilepaskan di kondensor. Alat ini memanfaatkan panas laten dari fluida kerja dalam perpindahan panasnyanya dan tanpa memerlukan energi dari luar. Penelitian  ini bertujuan untuk mengetahui pengaruh tinggi sirip dan jarak antar sirip terhadap kinerja termal heat pipe. Metode penelitian ini adalah eksperimen, yaitu     menggunakan pipa berdiameter 10 mm dengan panjang bagian kondensor   144 mm, panjang adiabatik 168 mm dan panjang evaporator 88 mm. Populasi yang digunakan dalam penelitian ini adalah pipa dengan jumlah sirip sebanyakm 5 buah dengan variasi jarak antar sirip 10 mm, 20 mm, dan 30 mm dan variasi tinggi sirip 0 mm (tanpa sirip), 30 mm, 40 mm dan 50 mm. Hasil penelitian menunjukkan ada perbedaan kinerja heat pipe pada masing masing variasi, antara variasi jarak antar sirip dan tinggi sirip. Kinerja termal dengan fluks kalor terendah terjadi pada heat pipe tanpa sirip, yaitu 10,2 W/cm2. Sedangkan kinerja termal tertinggi dengan fluks kalor terbesar terjadi pada interaksi jarak antar sirip 30 dan tinggi sirip 15 mm.
The Differences Overlap Camshaft Duration to Performance Motorcycle 4- Stroke 110cm3 Nurfirmansyah, Muhammad; Ahmad Hanif Firdaus
Formosa Journal of Science and Technology Vol. 3 No. 7 (2024): July 2024
Publisher : PT FORMOSA CENDEKIA GLOBAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55927/fjst.v3i7.10391

Abstract

The loss of performance in a motorcycle that has been used for a long time makes it uncomfortable when used. The purpose of this research is to determine the results of the effect of camshaft overlap duration on the performance of a 110 cc petrol engine. To verify its performance, experimental research methods were used in this thesis research. The research results show that variations in camshaft overlap duration between 12o, 15o, 18o (standard) 23o, and 28o have the effect of increasing vehicle performance. For example, using a variation of camshaft overlap duration of 28o produces the highest torque of 7,82 (Nm) at an engine speed of 6500 rpm and the highest power of 7.45 (Hp) at an engine speed of 7000 rpm and produces maximum BMEP 909,96 (KPa) at engine speed 6500 rpm. This can happen because according to the theory the greater the camshaft overlap duration on a vehicle, the better the flushing of the combustion chamber at top speed.
Co-Authors Abikusna, Setia Adji Nur Permana Adryansa, Ivan Ahmed Sabili Gifari Alfarizi Al Azis AM Mufarrih Amrullah, Utsman Syah Andri Setiawan Arif Rochman Fachrudin, Arif Rochman Astuti, Fina Andika Frida Bagus Irawan Celvin Yoga P, Bryan Etik Puspitasari Farida, Nike Nur Ficky Yuwan Dirta Frida, Fina Andika Harijono, Agus Ismi Choirotin Kurniawan, Alfian Seina Moch. Agus Choiron Monasari, Ratna Muhammad Daniar Hidayat Nanang Qosim Nurfirmansyah, Muhammad Purna Anugraha Suarsana Purwoko Purwoko Purwoko Purwoko Ratna Monasari Rizki Priya Pratama, Rizki Priya Samsul Hadi SANTOSO SANTOSO Septyana Riskitasari Supa Kusuma Aji Syamsul Hadi Vinan Viyus Wijaya Putra Zaidan Almeyda Zakki Fuadi Emzain