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All Journal Rotasi Jurnal Simetris Rekayasa Mesin VANOS Journal of Mechanical Engineering Education Journal of Science and Applicative Technology INVOTEK: Jurnal Inovasi Vokasional dan Teknologi Jurnal Tekno Insentif Jurnal Teknologi Terapan Journal of Renewable Energy and Mechanics APTEK G-Tech : Jurnal Teknologi Terapan Quantum Teknika Jurnal Vokasi Mekanika Sinergi Polmed : Jurnal Ilmiah Teknik Mesin AMMA : Jurnal Pengabdian Masyarakat Majalah Teknik Mesin
Dicky J. Silitonga
Teknik Mesin, Institut Teknologi Sumatera, Lampung Selatan, Indonesia 35365
Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Nursing Social Sciences Transportation

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Uji Performa Gasoline Engine menggunakan bioaditif cengkeh dengan bensin berkadar oktan 90 Devia Gahana Cindi Alfian; Rico Aditia Prahmana; Dicky J. Silitonga; Abdul Muhyi; Didik Supriyadi
Journal of Science and Applicative Technology Vol 4 No 1 (2020): Journal of Science and Applicative Technology June Chapter
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (542.971 KB) | DOI: 10.35472/jsat.v4i1.243

Abstract

Globally, the demand for fuels is ever-increasing and so is the demand for fuel additives. A fuel additive is a substance added in small quantities to increase the performance of the engine, decrease fuel consumption and reduce emission. The fuel additives have no specific set of raw materials or ingredients. Every fuel additive is different from the other in many ways of raw materials and ingredients to produce these additives. In many cases, fuel additives have made by chemical materials as additives for a gasoline engine. However, the optimal parameters for the reduction of fuel consumption are not clear. Accordingly, the present study performs a mixing additive material in the form of clove oil with pure gasoline fuel with a percentage of 1%, 0,6% and 0,3% from a total volume of gasoline to be tested. Then the mixing of the additive and gasoline is tested into the gasoline engine by varying the load using 200, 400, 600, 800, 1000, 1200, 1400, 1600, 1800 and 2000 Watt power with a fixed engine rotation of 2500 rpm. The results show that the reduction of fuel consumption respectively. Results showed that the addition of 1%, 0.6% and 0.3% clove oil into a 90 octane gasoline reduced fuel consumption by 10.6%, 18.2% and 15.4% respectively. Maximum reduction of fuel consumption was 28.6% at 800 W electrical load with 0.6% of clove oil additive.
Pengaruh Komposisi Campuran Minyak Sereh Wangi dan Minyak Cengkeh terhadap Unjuk Kerja Mesin Diesel Rico Aditia Prahmana; Devia Gahana Cindi Alfian; Didik Supriyadi; Dicky Januarizky Silitonga; Abdul Muhyi
Journal of Science and Applicative Technology Vol 4 No 2 (2020): Journal of Science and Applicative Technology December Chapter
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35472/jsat.v4i2.244

Abstract

The increase in fuel prices makes the use of essential oils as a natural bio-additive in diesel engines much in demand. This is because essential oils are believed to have good content to improve engine performance and reduce fuel consumption. In this research, essential oils used are citronella oil because they contain carboxylic compounds (-COOH) and clove oil which has the advantage to prevent corrosion. The aim is to improve engine performance and reduce fuel consumption can also prevent corrosion. This research was conducted by mixing citronella oil and clove oil with diesel fuel with a percentage of 1%, 0.5%, and 0.1% of the total volume. The diesel engine is operated with a loading variation of 200, 400, 600, 800, 1000, 1200, 1400, 1600, 1800, and 2000 W at a constant engine speed of 1500 rpm. The variables measured and calculated in this experiment are power, torque, Brake Mean Effective Pressure (BMEP), Specific Fuel Consumption (SFC). The results showed that the addition of citronella oil and clove oil to diesel fuel with a percentage of 0.1%, 0.5%, and 1% significantly reduced fuel consumption by 14.6%, 12.9%, and 18.3%, respectively. The maximum fuel reduction from mixed oils is only 0.086 liters/hour at 1000W loads with 1% bio-additives content.
Aplikasi Penggunaan Serah Wangi Sebagai Bioaditif Alami untuk Karakterasi Unjuk Kerja dari Mesin Diesel Abdul Muhyi; Rico Aditia Prahmana; Devia G. C. Alfian; Dicky J. Silitonga; Didik Supriyadi
Journal of Science and Applicative Technology Vol 3 No 1 (2019): Journal of Science and Applicative Technology August Chapter
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1188.007 KB) | DOI: 10.35472/jsat.v3i1.194

Abstract

The consumption of diesel fuel in Indonesia is increasing every year, one way to overcome this problem is to use natural bioaditive in the form of essential oils found in Indonesia. Essential oils used in this study are fragrant lemongrass because fragrant lemongrass contains carboxylic compounds (-COOH) [1,2,3]. With the aim of improving engine performance and reducing fuel consumption. This research was conducted by mixing fragrant citronella oil with diesel oil with a percentage of 1%, 0.5% and 0.1% of the total volume. Diesel engines are operated with variations in loading 200, 400, 600, 800, 1000, 1200, 1400, 1600, 1800 and 2000 W at a constant engine speed of 1500 rpm. The variables measured and calculated in this experiment are power, torque, Break Mean Effective Pressure (BMEP), Specific Fuel Consumption (SFC). The results showed that adding citronella oil to diesel fuel with a percentage of 1%, 0.5% and 0.1% significantly reduced fuel consumption by 15.5%, 3.6% and 2.6% respectively. The maximum reduction in fuel consumption reaches 0.055 liters / hour at 200W loading with a bioaditive level of 0.1%. The next study planned is to mix clove oil and citronella oil as bioaditive so that it is expected to reduce fuel consumption and engine corrosion. Keywords: Diesel engine, bioaditive, fragrant citronella oil, performance of diesel engines, fuel consumption
Prediksi Lama Studi dan Predikat Kelulusan Mahasiswa Menggunakan Algoritma Supervised Learning Nur Baiti Nasution; Dwi Hartanto; Dicky Januarizky Silitonga; Lasimin; Dewi Mardhiyana
G-Tech: Jurnal Teknologi Terapan Vol 7 No 2 (2023): G-Tech, Vol. 7 No. 2 April 2023
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (264.444 KB) | DOI: 10.33379/gtech.v7i2.2077

Abstract

Untuk menjaga kualitas alumni di suatu universitas, perlu dilakukan prediksi mengenai masa studi dan IPK akhir mahasiswa. Prediksi masa studi dan predikat dapat digunakan sebagai dasar pemberian perlakuan agar mahasiswa dapat lulus tepat waktu dengan nilai yang baik. Lebih lanjut, prediksi tersebut juga dapat digunakan sebagai dasar perbaikan pengelolaan universitas. Penelitian ini bertujuan untuk mengembangkan model klasifikasi menggunakan algoritma supervised learning untuk memprediksi masa studi dan predikat IPK mahasiswa ketika lulus kuliah. Data yang digunakan adalah data alumni Universitas Pekalongan tahun 2018 yang terdiri dari 1208 alumni. Pemodelan dilakukan dengan menggunakan metodologi CRISP DM dengan menerapkan 3 model klasifikasi yaitu KNN, Decision Tree, dan Support Vector Machine. Metrik keberhasilan yang digunakan adalah akurasi. Dari hasil pemodelan, diperoleh bahwa model yang terbaik untuk variabel masa studi adalah SVM dengan nilai akurasi 0.70 dan model terbaik untuk variabel predikat adalah KNN dengan nilai akurasi 0.51.
The Effect of Pressure Variations on the Characteristics of Coconut Shell Based Briquettes Using Tapioca Starch Adhesive Devia Gahana Cindi Alfian; Marone J Tambunan; Fajar Paundra; Dicky J Silitonga; Lathifa Putri A; Muhammad Syaukani
ROTASI Vol 25, No 3 (2023): VOLUME 25, NOMOR 3, JULI 2023
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/rotasi.25.3.23-32

Abstract

The very limited availability of energy on this planet is one of the main problems that concerns almost all countries. The presence of emergency energy indicates that energy usage is very high. Therefore, encouraging the use of new and sustainable energy sources is of utmost importance. Biomass energy can be the answer to overcoming the limitations of decreasing fossil assets, especially through the production of charcoal briquettes. Biomass energy is derived from plants or easily traceable natural materials that are abundant, such as wood waste, rice husks, bagasse, and coconut shells. Coconut shells, for example, can be a primary ingredient for making charcoal briquettes, using tapioca flour or starch as an adhesive. The briquettes can be produced using pressure variations of 50 kg/cm², 60 kg/cm², and 70 kg/cm², with a drying temperature of 100°C for 3 hours. The recommended ratio for making charcoal briquettes is 3 parts coconut shell to 1 parts tapioca flour adhesive. The purpose of this study is to compare the briquettes produced with coconut shell and tapioca flour adhesive to the SNI Briquette standard No.1/6235/2000. For the conducted tests, the results were as follows: the water content was 6.06%, the ash content was 5.9695%, the carbon content was 43.5946%, and the calorific value was 34,182.6808 calories. Additionally, the substance score yield was 26.845%, and the combustion rate was 0.12179 g/minute.
Experimental Investigation of The Heat Transfer Characteristics of Hybrid Nanofluid Al₂O₃CuO-Distilled Water with The Variation of Concentration Ratios Devia Gahana Cindi Alfian; Nicholas Binsar Pandapotan; Muhammad Syaukani; Dicky J. Silitonga; Devy Setiorini Sa’adiyah; Taurista Perdana Syawitri
Jurnal Tekno Insentif Vol 17 No 1 (2023): Jurnal Tekno Insentif
Publisher : Lembaga Layanan Pendidikan Tinggi Wilayah IV

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36787/jti.v17i1.940

Abstract

Abstrak Panas berlebih yang terjadi pada CPU (Central Processing Unit) komputer dapat menyebabkan penurunan kinerja komputer. Penggunaan fluida pendingin yang diaplikasikan pada perangkat waterblock dapat membantu penurunan temperatur panas berlebih. Salah satu fluida pendingin yang dapat digunakan pada waterblok adalah fluida pendingin jenis nanofluida. Nanofluida merupakan fluida kerja yang mengandung nanopartikel dan fluida dasar untuk dialirkan pada perangkat pengujian. Penelitian ini dilakukan untuk mengetahui karakteristik perpindahan panas dari perangkat uji waterblock dengan menggunakan variasi perbandingan konsentrasi 25% Al2O3: 75% CuO, 50% Al2O3: 50% CuO, 75% Al2O3: 25% CuO dan fraksi volume 0,3% dengan komposisi yang terdiri dari nanofluida Al2O3-CuO/Air Distilasi. Metode pembuatan nanofluida dilakukan dengan proses sonikasi selama 4 jam. Berdasarkan hasil penelitian menunjukkan penurunan temperatur heater paling signifikan ditunjukkan pada hybrida nanofluida dengan perbandingan 75% Al2O3 : 25% CuO sebesar 24,1oC dengan debit 1 liter/menit, sedangkan pada air distilasi penurunan temperatur heater tertinggi ditunjukkan oleh flowrate 1,9 liter/menit 3,4oC. Besarnya nilai koefisien perpindahan panas tertinggi ditunjukkan pada variasi 75% Al2O3 : 25% CuO pada rentang Bilangan Reynolds 41,9-113,7 dengan nilai tertinggi sebesar 345.798 W/m2ᵒC. Hasil pengujian menunjukkan bahwa penggunaan hibrida nanofluida dapat mengurangi temperatur lebih baik daripada air distilasi. Abstract Excessive heat that occurs in the computer's CPU (Central Processing Unit) can cause a decrease in computer performance. Cooling fluid applied to the waterblock device can help reduce overheating temperatures. One of the cooling fluids used in waterblocks is the cooling fluid of the nanofluid type. Nanofluid is a working fluid that contains nanoparticles and base fluid to flow on the testing device. This research was conducted to determine the heat transfer characteristics of the waterblock test device using variations in the concentration ratio of 25% Al2O3 : 75% CuO, 50% Al2O3 : 50% CuO, 75% Al2O3 : 25% CuO and a volume fraction of 0.3% with the same composition. consists of nanofluid Al2O3-CuO/Distilled Water. The method of making nanofluids is done by sonication process for 4 hours. Based on the study's results, the most significant decrease in heater temperature was shown in nanofluid hybrids with a ratio of 75% Al2O3 : 25% CuO of 24.1oC with a discharge of 1 liter/minute. In contrast, the highest decrease in heater temperature in distilled water was shown by a flow rate of 1.9 liters/minute 3.4oC. The highest value of the heat transfer coefficient is shown in the variation of 75% Al2O3 : 25% CuO in the Reynolds number range of 41.9-113.7 with the highest value of 345,798 W/m2ᵒC. The test results show that nanofluid hybrids can reduce temperature better than distilled water.
CITRONELLA OIL AS BIOADDITIVES ON SI ENGINE PERFORMANCE CHARACTERISTICS Alfian, Devia; Farhani, Amna Citra; Supriyadi, Didik; Prahmana, Rico Aditia; Silitonga, Dicky J
Jurnal Rekayasa Mesin Vol. 14 No. 3 (2023)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v14i3.1284

Abstract

Current dynamics of world energy supply have driven various innovations by the industry as well as research communities. Fossil fuels, although experiencing a declining interest due to sustainability issues, remain undeniably crucial since they are nearly irreplaceable in some sectors including electricity generation, it is necessary to continuously establish efforts to improve efficiency of those kinds of fuel. In this work, the authors evaluate the potential of locally sourced essential oils, namely citronella, as a fuel additive in a vision of raising the fuel economy of gasoline RON 90. Citronella oil was selected based on a positive hypothesis deduced from its chemical properties, as mentioned in multiple published works. Tests were made on a generator-set powered by gasoline engine using the mixture of RON 90 and citronella oil of various concentrations as the fuels. In addition, a commercial synthetic additive was also tested alongside the essential oil to provide a comparative figure. Meanwhile other investigators suggest a favorable effect of essential oils, our results show that citronella oil additions lead to higher fuel consumption at the same power level. A similar negative effect was also demonstrated by the synthetic additive. The only sector showing positive results is in terms of exhaust temperature where experiments with citronella additives create lower exhaust temperature as compared to pure gasoline and synthetic additives. However, rooms for innovation remain open by exploring other variables such as higher additive concentrations or combining different kinds of essential oils.
Investigating the Tribological Performance of Natural Rubber Additives in Palm Oil-Based Lubricants Aji, Ahmad Frantoni; Alfian, Devia Gahana Cindi; Prasetyo, Tri Wahyu; Firjatullah, Ahmad Labib; Sufra, Rifqi; Pujiyulianto, Eko; Silitonga, Dicky Januarizky; Auriyani, Wika Atro; Yusupandi, Fauzi
ROTASI Vol 26, No 3 (2024): VOLUME 26, NOMOR 3, JULI 2024
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/rotasi.26.3.57-64

Abstract

Human dependence on mineral-based energy sources poses challenges related to toxicity, depletion, degradation, and environmental hazards. An appropriate replacement for mineral-based lubricants has yet to be realized; one available option for humans is alternative, renewable, environmentally friendly, and biodegradable energy sources. Lubricants play an important role in product processing, transportation, agriculture, and other key sectors in industrial development. This study was conducted to explore the potential use of palm oil as the main ingredient with the addition of rubber as an additive. The method of making the lubricant involved mixing 3%, 5%, and 7% rubber latex with sonicated palm oil using UAE. Next, wear testing was performed using a tribometer based on the ball-on-disc principle, utilizing a modified bench-top drill machine. The testing was carried out at room temperature, maintaining a constant load of 8.83 N and a rotational speed of 180 rpm for 5 minutes per sample. Microscopic analysis of the wear scars on the plate samples showed different wear patterns and characteristics for each lubricant, with measurements taken at various positions for accuracy. The results indicated that the lubricant with a 5% rubber mixture was the best, with a wear width of 535.9126 µm, compared to the commercial lubricant (SAE 15W 40) which had a wear width of 539.906 µm. This research demonstrates the potential use of a palm oil and rubber mixture as a more environmentally friendly lubricant alternative.
ANALYSIS OF COOLING LOAD IN ROOM GK-104, INSTITUT TEKNOLOGI SUMATERA Alfian, Devia Gahana Cindi; Sitanggang, Feldrico Andreas; Marcellino, Andrean; Petrus, Bastian Roni; Khariman, Muhammad Nur Na’im; Silitonga, Dicky Januarizky
Journal of Renewable Energy and Mechanics Vol. 7 No. 01 (2024): REM VOL 7 NO 01 2024
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/rem.2024.16024

Abstract

The effects of global warming are very impactful in everyday life, one of which makes the air feel hot, a cooling machine is needed to be able to reduce hot air in a room. Cooling machines have become an important necessity in everyday life. The cooling machine can be maximally utilized if the heat load above it must be appropriate or below. This research was conducted to analyze the cooling load in the public lecture room 1 of the Sumatra Institute of Technology GK-104. The data required in this study are the length of the room, the width of the room, the amount of internal heat of the room, the maximum number of people in the room, and the cooling capacity of the air conditioner. For the calculation of cooling load analysis is divided into 4 parts namely occupant load, equipment load, lighting load, and transmission load. After the analysis, the value of each is obtained 2,656.68 W, 450.09 W, 3,930.62 W, 2,238.71 W. The total cooling load of a room is 9,276.114 W. For the capacity of 2 air conditioners GK-104 room is 10,040 W. It can be concluded that the cooling load of the room is still far below the cooling capacity of the air conditioner and the room can cool according to the desired temperature.
Simulation Study of Pin-Type Heatsinks on Convection Heat Transfer Characteristics in Electronic Devices Chaniago, Noverto Zhorif; Alfian, Devia Gahana Cindi; Syaukani, Muhammad; Pujiyulianto, Eko; Nurullah, Fajar Perdana; Silitonga, Dicky Januarizky
ROTASI Vol 26, No 4 (2024): VOLUME 26, NOMOR 4, OKTOBER 2024
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/rotasi.26.4.47-53

Abstract

Electronic components are components that require an optimal design in order to provide good heat release performance. The heat sink component is a relevant solution to help cool an electronic component by flowing heat energy into the environment either naturally or forcibly with the help of a fan. The purpose of this study is to determine the effect of material type on heat sink temperature distribution, determine the phenomenon of velocity boundary layer and thermal boundary layer that occurs in each heat sink variation, determine the effect of design shape and pin arrangement on pressure drop, determine the best design according to the final results of the study. This research uses 6 variations of design shape, 2 variations of arrangement (inline and staggered), and 3 types of materials (Aluminum, Copper, and Iron). The method used in this research is a simulation method with three stages of process, namely, pre processing, processing, and post processing. The results showed that copper material is the best in conducting heat with a temperature drop of 98.5% from the base temperature. The inline arrangement obtained a lower pressure drop than the staggered arrangement and the best design was obtained by fillet square perforation with an inline arrangement.
Co-Authors Abdul Muhyi Aditia Prahmana, Rico Ahmadien, Ichwan Kurnia Aji, Ahmad Frantoni Andhyka Tyaz Nugraha Andi Kolala, Putra Auriyani, Wika Atro Carlodinho, Samuel Chaniago, Noverto Zhorif Devia Gahana Cindi Alfian Devy Setiorini Sa’adiyah Didik Supriyadi Didik Supriyadi, Didik Dwi Hartanto Eko Pujiyulianto Fajar Paundra Firjatullah, Ahmad Labib Furkhan, M. Aulia G., Gita Christo Gahana Cindi Alfian, Devia Hidayatullah, M Taufik Jehuda, Marthin Juhensen, Jodi Kardo Rajagukguk, Kardo Khaira, M. Irsyad Bin Iskandar Khariman, Muhammad Nur Na’im Kolala, Putra Andi Lasimin Lathifa Putri A Lathifa Putri Afisna Manurung, Daniel Marcellino, Andrean Mardhiyana, Dewi Marone J Tambunan Meliala, Arvin Ade Guna Muhammad Syaukani Muhyi, Abdul Munisamy, Loganraj Nanda Syanur, Farid Nasution, Nur Baiti Nicholas Binsar Pandapotan Nurullah, Fajar Perdana Paundra, Fajar Perdana Nurullah, Fajar Petrus, Bastian Roni Prahmana, Rico Aditia Prasetyo, Tri Wahyu Pujiyulianto, Eko Riayatsyah, T. M. Indra Rico Aditia Prahmana Rifqi Sufra Samarul Fuad, Muhammad Zamir Aizat Sindhu, I Gede Pande Naraya Sitanggang, Feldrico Andreas Sitorus, Jhonatan Jufrianto Sui, Jing Xian Taurista Perdana Syawitri, Taurista Perdana Yunasdi, Hamda Yusupandi, Fauzi