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All Journal Rotasi Jurnal Teknik ITS Jurnal Simetris Rekayasa Mesin JURNAL INTEGRASI PROSES VANOS Journal of Mechanical Engineering Education Jurnal Rekayasa Mesin Journal of Science and Applicative Technology INVOTEK: Jurnal Inovasi Vokasional dan Teknologi Jurnal Tekno Insentif Jurnal Teknologi Terapan Journal of Renewable Energy and Mechanics International Journal of Applied Sciences and Smart Technologies Quantum Teknika Jurnal Vokasi Mekanika Sinergi Polmed : Jurnal Ilmiah Teknik Mesin AMMA : Jurnal Pengabdian Masyarakat Perwira Journal of Community Development (PJCD) Majalah Teknik Mesin
Devia Gahana Cindi Alfian
Department Of Mechanical Engineering, Institut Teknologi Sumatera, Jalan Terusan Ryacudu, Desa Way Hui, Kecamatan Jatiagung, Lampung Selatan, Indonesia 35365
Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Nursing Social Sciences Transportation Other

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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.
Program Sosialisasi Pengolahan Kotoran Sapi Menjadi Biogas Di Sanjaya Farm, Lampung Lathifa Putri Afisna; Devia Gahana Cindi Alfian; Ilham Dwi Arirohman; Muhammad Syaukani; Achmad Gus Fahmi
AMMA : Jurnal Pengabdian Masyarakat Vol. 2 No. 10 : November (2023): AMMA : Jurnal Pengabdian Masyarakat
Publisher : CV. Multi Kreasi Media

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Abstract

Unmitigated cow dung waste possesses the capacity to induce pollution and environmental degradation, hence potentially compromising air quality and the well-being of the neighboring population. The objective of this Community Service initiative is to enhance community understanding and promote the adoption of biogas technology as a sustainable energy alternative within livestock communities in the Sukabumi district of Lampung Province. The approach of socialization and direct instruction employed in this study involves educating farmers and local populations on the effective treatment of cow dung waste, thereby mitigating environmental degradation and harnessing waste as a valuable energy resource. Pretest and posttest questionnaires were administered to assess participants' comprehension levels and evaluate the outcomes of the socialization process. According to the responses obtained from the questionnaires completed by the participants, a significant majority (90%) acknowledged the existence of environmental consequences associated with untreated cow dung. Furthermore, an overwhelming majority (99%) expressed agreement with the idea of converting cow dung into biogas. Additionally, a substantial proportion (90%) of the participants reported an enhanced comprehension of the process involved in converting cow dung into biogas. This phenomenon demonstrates that the community's view necessitates the integration of technology in order to address their issues. Hence, the utilization of suitable technology is imperative for the community, particularly cattle farmers, to effectively manage the disposal of cow dung waste, which significantly affects the environment. The utilization of biogas technology has the potential to mitigate this impact and offer alternative energy alternatives that are more ecologically sustainable for the local community.
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.
ANALISIS EFISIENSI PERFORMA PEMBAKARAN INTERNAL PADA KERJA MESIN EMPAT LANGKAH TERHADAP PENAMBAHAN ZAT ADITIF METANOL Damayanti Damayanti; Adimas Anugrah Rivandy; Athallah Satrionindya Herlambang; Guita Normi; Putra Hidayatulloh; Veronika Viany Suswanto; Agus Slamet Riyadi; Didik Supriyadi; Desi Riana Saputri; Yunita Fahni; Andri Sanjaya; Devia Gahana Cindi Alfian; Muhammad Triyogo Adiwibowo; Dikri Uzlifah Janah; Taharuddin Taharuddin
JURNAL INTEGRASI PROSES Vol 13, No 1 (2024)
Publisher : JURNAL INTEGRASI PROSES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/jip.v13i1.24936

Abstract

Cadangan minyak bumi Indonesia terus menurun sedangkan jumlah kendaraan dan kebutuhan bahan bakar di Indonesia semakin meningkat. Peningkatan jumlah kendaraan, yang mana performa pembakarannya yang kurang   sempurna dapat mengakibatkan banyaknya polusi udara. Penelitian ini bertujuan untuk meningkatkan kinerja motor bakar, dan mengurangi polusi udara dari emisi gas buang dengan cara menambahkan zat aditif metanol pada bahan bakar. Analisis performa mesin yang dilakukan yaitu power, torsi, break mean effective pressure, efisiensi termal, dan specific fuel consumption, serta pengujian emisi gas buang kendaraan. Pada analisis uji performa mesin bensin, terlihat bahwa dengan penambahan metanol sebanyak 1,2%, terjadi peningkatan torsi, power, dan BMEP pada putaran 2500 rpm masing-masing sebesar 49,45%, 53,38%, dan 49,55%.
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.
The Effect of Variations in The Composition of Coffee Grounds and Cocopeat Powder on The Characteristics of Briquettes With Tapioca Flour as A Binder Ahmadien, Ichwan Kurnia; Alfian, Devia Gahana Cindi; Afisna, Lathifa Putri; Silitonga, Dicky Januarizky
Jurnal Tekno Insentif Vol 18 No 2 (2024): Jurnal Tekno Insentif
Publisher : Lembaga Layanan Pendidikan Tinggi Wilayah IV

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36787/jti.v18i2.1714

Abstract

Biomass energy can be employed as a substitute for fossil fuels in energy systems: it is relatively sulfur-free, so it does not cause air pollution, and it can be used continuously due to its renewable nature. In this study, the production of biomass briquettes were carried out using coffee grounds and cocopeat powder as the base materials. The method involved making briquettes from coffee grounds and cocopeat powder with percentage ratios of 80%+20%, 60%+40%, 40%+60%, also 20%+80% using tapioca flour as a binder. The pressing was done at 50 kgf/cm², with carbonization of coffee grounds and cocopeat powder at 180°C for 60 minutes. Based on the testing results, the best variation was 60% coffee grounds and 40% cocopeat powder with a calorific value of 5196.25 cal/g, moisture content of 9.62%, ash content of 8.11%, carbon content of 50.2%, volatile matter of 67.4%, and a burning rate of 0.1978 grams/minute.
Analysis of Characteristics of Rice Husk Briquettes Using Starch Adhesive with Varying Adhesive Percentages Alfian, Devia Gahana Cindi; Yunasdi, Hamda; Syaukani, Muhammad; Silitonga, Dicky Januarizky
Simetris: Jurnal Teknik Mesin, Elektro dan Ilmu Komputer Vol 15, No 2 (2024): JURNAL SIMETRIS VOLUME 15 NO 2 TAHUN 2024
Publisher : Fakultas Teknik Universitas Muria Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24176/simet.v15i2.11162

Abstract

The increasing energy demand is currently being experienced by many countries, including Indonesia. Biomass holds significant potential as an alternative energy source that can replace the widely used fossil fuels. Biomass is also available in abundant quantities. One method to harness energy from biomass is through briquetting. Briquettes are solid materials that can be used as fuel for a specified period. In this research, rice husk biomass is used as the primary material for creating briquettes. Tapioca flour is used as the binder, and the briquettes are formed under a pressure of 40 kg/cm². The drying process is carried out at a temperature of 100°C for 3 hours, with variations in the percentage of the binder. The binder-to-rice husk ratios tested are 70% + 30%, 60% + 40%, and 50% + 50%. Based on the conducted tests, the most favorable variation is the briquette with a 50% + 50% adhesive-to-rice husk ratio. This variation exhibits a moisture content of 4.84%, a calorific value of 26,728.61 cal/g, an ash content of 28.78825%, a carbon content of 50.427%, a volatile matter content of 33.919%, and a combustion rate of 0.45662 g/minute.
Co-Authors Abdul Muhyi Achmad Gus Fahmi Adimas Anugrah Rivandy Agus Slamet Riyadi Ahmadien, Ichwan Kurnia Aji, Ahmad Frantoni Andhyka Tyaz Nugraha Andri Sanjaya Arirohman, Ilham Dwi Athallah Satrionindya Herlambang Auriyani, Wika Atro Carlodinho, Samuel Chaniago, Noverto Zhorif Damayanti Damayanti Desi Riana Saputri Devy Setiorini Sa’adiyah Dian Fajarika, Dian Dicky J. Silitonga Didik Supriyadi Didik Supriyadi Didik Supriyadi, Didik Dikri Uzlifah Janah Djatmiko Ichsani Eko Pujiyulianto Fajar Paundra Fajar Perdana Nurullah Firjatullah, Ahmad Labib Furkhan, M. Aulia G., Gita Christo Guita Normi Hadi Teguh Yudistira, Hadi Teguh Harmiansyah Hidayatullah, M Taufik Juhensen, Jodi Khaira, M. Irsyad Bin Iskandar Khariman, Muhammad Nur Na’im Lathifa Putri A Lathifa Putri Afisna Manurung, Daniel Marcellino, Andrean Marone J Tambunan Meliala, Arvin Ade Guna Mika Margareta Muhammad Syaukani Muhammad Triyogo Adiwibowo Muhyi, Abdul Nicholas Binsar Pandapotan Nurullah, Fajar Perdana Paundra, Fajar Petrus, Bastian Roni Prahmana, Rico Aditia Prasetyo, Tri Wahyu Putra Andi Kolala Putra Hidayatulloh Riayatsyah, T. M. Indra Rico Aditia Prahmana Rifqi Sufra Rinda Gusvita Rizky Faesal Sadikin Saputra, Khamid Y. W. Silitonga, Dicky Januarizky Sindhu, I Gede Pande Naraya Sitanggang, Feldrico Andreas Sitorus, Jhonatan Jufrianto Taharuddin Taharuddin Taurista Perdana Syawitri, Taurista Perdana Theodorus Rendy Prasetya Veronika Viany Suswanto Yunasdi, Hamda Yunita Fahni Yusupandi, Fauzi