Article Per Year (5 Year)
p-Index From 2021 - 2026
4.764
P-Index
This Author published in this journals
All Journal Jurnal Pendidikan Teknologi dan Kejuruan JMPM (Jurnal Material dan Proses Manufaktur) Turbo : Jurnal Program Studi Teknik Mesin JURNAL DINAMIKA VOKASIONAL TEKNIK MESIN Journal of Energy, Mechanical, Material and Manufacturing Engineering AL-JAZARI JURNAL ILMIAH TEKNIK MESIN Angkasa: Jurnal Ilmiah Bidang Teknologi Jurnal Tekno Insentif Jurnal Teknologi Terapan Journal of Renewable Energy and Mechanics Jurnal Teknik Mesin Indonesia KURVATEK Scientific Journal of Mechanical Engineering Kinematika MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering JTAM ROTARY Jurnal Ilmiah Teknik Mesin Poros Jurnal Vokasi Mekanika Sinergi Polmed : Jurnal Ilmiah Teknik Mesin Vortex Jurnal Pengabdian Masyarakat Bhinneka Journal of Engineering Researcher and Lecturer AMMA : Jurnal Pengabdian Masyarakat TeknoKreatif: Jurnal Pengabdian kepada Masyarakat Majalah Teknik Mesin
Lathifa Putri Afisna
Institut Teknologi Sumatera
Aerospace Engineering 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 Public Health Social Sciences Other

Published : 37 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 37 Documents
Search

 1   2   3   4 
Characteristics of Briquettes Produced from Rubber Seed Shell and Palm Kernel Shell Using Tapioca Flour as Binder Jayadi, Farid; Cindi Alfian, Devia Gahana; Pratama, Muhammad Hasbi; Nurullah, Fajar Perdana; Silitonga, Dicky Januarizky; Afisna, Lathifa Putri
TURBO [Tulisan Riset Berbasis Online] Vol 14, No 2 (2025): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v14i2.4607

Abstract

Indonesia faces challenges in managing renewable energy as an alternative to fossil fuels. This study aims to compare commercially available briquettes with experimental briquettes produced from a mixture of rubber seed shells and palm shells using tapioca flour as a binder. The raw material composition variations between rubber seed shells and palm shells used were 80:20, 50:50, and 20:80, with 10% tapioca flour binder, and dried at a temperature of 100°C for 3 hours. The purpose of this research is to compare the produced briquettes with those already marketed. Based on the experiments and tests carried out, the results show that the 20:80 variation produced briquettes most comparable to the market samples, with a density of 0.7438 g/cm³, moisture content of 3.43%, calorific value of 6849.46 cal/gram, combustion rate of 0.1117 g/minute, and a drop test value of 4.7672%.
Analisis Pengaruh Variasi Rasio Komposisi Ampas Tebu Dan Arang Tempurung Kelapa Terhadap Karakteristik Briket Muhammad Firmansyah Suherman; Rico Aditia Prahmana; Achmad Gus Fahmi; Lathifa Putri Afisna; Farid Jayadi; Devia Gahana Cindi Alvian; Pathur Razi Ansyah
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 18, No 2 (2026): Mei
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/angkasa.v18i2.3990

Abstract

In Indonesia, basic energy needs still depend on natural gas, coal, and petroleum until their availability is decreasing. Bagasse and coconut shell charcoal briquettes offer the best solution as an alternative energy source that is environmentally friendly and abundantly available. This study aims to analyze the effect of variations in the composition of bagasse (AT) and coconut shell charcoal (TK) using tapioca starch adhesive on the characteristics of the briquettes. The compositions tested were 25% AT : 75% TK; 30% AT : 70% TK; 35% AT : 65% TK. The briquettes were evaluated based on parameters such as calorific value, carbon content, ash content, water content, volatile matter content, and combustion rate. The results showed that the briquettes with composition variations of 25% bagasse and 75% coconut shell charcoal had a calorific value of 5721.63 cal/g, carbon content of 64%, ash content of 8%, water content of 7.56%, volatile matter content of 28%, and a combustion rate of 0.19 grams/minute. However, only the water content value that meets SNI 1683/2021 quality 1 is ≤ 8%
Performance of Four Step Engine Generator Set with Oxy-Hydrogen (HHO) Fuel from Water Electrolysis Process Using Vacuum Valve Carburator Prasetya, Theodorus Rendy; Afisna, Lathifa Putri; Alfian, Devia G.C.; Sadikin, Rizky Faesal
Journal of Renewable Energy and Mechanics Vol. 5 No. 02 (2022): REM VOL 5 NO 02 2022
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/rem.2022.10058

Abstract

Alternative energy sources are required to lessen the environmental impact brought on by the usage of fossil fuels as a result of rising energy demand and rising fossil fuel use. One of the fuels that can be utilized to power generator sets is oxy-hydrogen gas. Oxy-hydrogen gas can be obtained from the electrolysis of water using environmentally friendly energy sources. This study aims to determine the effect of the use of oxy-hydrogen gas from the electrolysis of water as an alternative fuel, to find the performance parameters of the generator set engine using oxy-hydrogen fuel, to compare the performance of the generator set engine with oxy-hydrogen gas fuel with other fuels like pertalite fuel and a mixture of oxy-hydrogen gas and pertalite. The study used a 4 stroke gasoline engine generator set mounted with a vacuum valve type carburetor with a load of 1000 watts which is commonly used. From the results of the study, the performance parameters of the generator set were obtained using oxy-hydrogen fuel. The parameter value when the load is 1000 watts, the effective power of the generator is 1.035 kW, the torque value at 3.297 Nm, specific fuel consumption is 0.3658 kg/kW.hour, the thermal efficiency value is 12.05% and the average effective pressure value is 184.06 kPa.
Experimental Study of The Potential for Energy Absorption and Drying Time of Coffee Beans Using a Dome Dryer Type Dryer in The Sukmailang Area of Pesawaran Regency Santoso, Yopi Rusdian; Afisna, Lathifa Putri; Syaukani, Muhammad; Saragih, Gita Johannes
Journal of Renewable Energy and Mechanics Vol. 6 No. 02 (2023): REM VOL 6 NO 02 2023
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/rem.2023.10479

Abstract

The traditional drying method has many weaknesses, namely it is very dependent on the weather, so that drying takes a long time. Traditional drying methods result in frequent contamination of dust, dirt, insects, and if wet they are prone to moss growth due to delays in drying during cloudy or rainy weather. This study designed a coffee bean dryer with electric power which is the result of converting solar energy with the help of photovoltaic which is first stored in the battery. The main components of this tool are: drying chamber, drying roof, tray, thermostat, heating element, this test is carried out to determine changes in seed moisture content, required power and efficiency. The temperature is set at 50°C with a fan speed of 3m/s. The fastest decrease in water content occurred in the mass of 1 kg coffee bean samples starting on June 22, 2022 from 28.5% water content to 12% moisture content. Meanwhile, the longest decrease in the water content of coffee beans was at a mass of 2 kg coffee beans on June 24, 2022, the initial water content of coffee beans was 29.3% to 13.2%. The greater the mass of the coffee beans to be dried, the greater the time required to dry the coffee beans using a dome dryer. The maximum power is in the Sukmailang area, Pesawaran district which has a plateau as high as 1200 meters above sea level (MDPL) with an average power of 11.38 Watt. The highest power is produced at 12:00 WIB with a value of 16.49 Watts. The use of solar panels in the Sukmailang area, Pesawaran Regency which has a plateau as high as 1200 (MDPL) is still not effectively utilized because the results obtained have an average efficiency value of 2.22%
PENGARUH PERBANDINGAN KOMPOSISI CAMPURAN KOTORAN SAPI DAN AIR DALAM PRODUKSI BIOGAS DENGAN TEKNOLOGI BIODIGESTER Adi Prayoga; Gilang Handi Wibowo; Muhammad Lasin; Lathifa Putri Afisna; Selamet Riski Amiludin
Jurnal Vokasi Mekanika (VoMek) Vol 5 No 2 (2023): Jurnal Vokasi Mekanika
Publisher : Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v5i2.430

Abstract

Biogas merupakan salah satu sumber energi terbarukan yang dapat menjawab krisis kebutuhan energi pada saat ini. Biogas dihasilkan dari proses pemecahan bahan limbah organik yang melibatkan aktivitas bakteri anaerob dalam kondisi anaerobik dalam suatu digester. Kelebihan dari biogas sendiri dibanding dengan bahan lain adalah sifatnya yang ramah lingkungan serta dapat diperbaharui. Salah satu parameter yang dapat mempengaruhi proses produksi biogas adalah tingkat pengenceran serta kandungan bahan organik didalam campuran biogas yang ada pada digester. Tujuan penelitian ini adalah untuk mempelajari sistem kerja instalasi alat pembuatan biogas dari kotoran sapi, mengetahui secara ilmiah proses produksi biogas, mengetahui tekanan gas pada digester, nyala api, suhu digester dan keasaman pH yang dihasilkan. Penelitian ini dilakukan dengan menggunakan metode eksperimental, berdasarkan percobaan yang dilakukan dengan 2 (dua) variasi (kotoran : air), yakni variasi 1:1 dan 1:2. Kemudian diukur parameter-parameter penelitian yaitu tekanan gas, nyala api, suhu digester dan keasaman pH. Pengamatan dilaksanakan selama 14 hari. Pada percobaan yang dilakukan diperoleh hasil gas metana dimana perbandingan kotoran sapi dengan air merupakan faktor penting dalam memproduksi gas metana. Dari hasil biogas pada variasi 1:1 dengan 1:2 gas yang paling banyak di hasilkan pada variasi 1:2. Pada derajat keasaman perbandingan 1:1 memiliki nilai pH netral dan 1:2 mendekati nilai pH netral. pH tersebut, berdampak pada bakteri yang menghasilkan biogas.
PENGARUH VARIASI JUMLAH MICROBUBBLE GENERATOR (MBG) TERHADAP KENAIKAN KADAR DISSOLVED OXYGEN (DO) YANG DIHASILKAN PADA RUANG TERBUKA WR Supratman; Lathifa Putri Afisna; Harmiansyah Harmiansyah
Jurnal Vokasi Mekanika (VoMek) Vol 6 No 1 (2024): Jurnal Vokasi Mekanika
Publisher : Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v6i1.606

Abstract

Air bersih merupakan suatu kebutuhan yang sangat penting bagi kehidupan makhluk hidup yang dibutuhkan setiap hari. Dissolved Oxygen (DO) merupakan oksigen yang terlarut pada air yang yang disuplai oleh sebuah alat Microbubble Generator (MBG). Tujuan utama dari pengujian ini adalah untuk mengetahui kenaikan tingkat Disolved Oxygen (DO) serta oxygen transfer coefficient (KLa) yang terdapat di dalam air terhadap variasi debit air (QL) dan debit udara (QG) serta waktu aerasi. Metode penelitian yang digunakan adalah metode eksperimental dengan melakukan penelitian terhadap kinerja microbubble generator. Media utama pengujian ini menggunakan kolam terpal dan air bersih. Penelitian ini dilakukan pada ruang terbuka dengan dua buah MBG dengan tipe yang sama. Parameter pengujian yang digunakan adalah variasi debit air (QL) 20 lpm, 30 lpm, 40 lpm dan variasi debit udara (QG) 0,1 lpm, 0,5 lpm, 0,7 lpm serta waktu (t) aerasi selama 60 menit. Hasil dari penelitian ini menunjukkan bahwa kinerja multiple-microbubble generator lebih optimal untuk menghasilkan kadar oksigen terlarut. Nilai DO yang dihasilkan sebesar 1,7 mg/L – 2,3 mg/L. Pengaruh dari debit air (QL) menunjukkan bahwa semakin tinggi debit air (QL) yang diberikan, maka peningkatan kadar oksigen terlarut didalam air akan lebih cepat dan signifikan. Nilai KLa yang dihasilkan berbanding lurus dengan kecepatan aliran, semakin tinggi kecepatan aliran yang diberikan maka akan semakin besar nilai KLa yang dihasilkan.
Experimental Study Of Wear Testing Of ASTM 440C Steel On A Ball-On-Disc Tribometer Using Variations Of Lubricants Jhonatan Jufrianto Sitorus; Dicky Januarizky Silitonga; Putra Andi Kolala; Lathifa Putri Afisna; Devia Gahana Cindi Alfian
Jurnal Vokasi Mekanika (VoMek) Vol 7 No 4 (2025): Jurnal Vokasi Mekanika
Publisher : Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v7i4.896

Abstract

Bearings are important components in industry that function to reduce friction between moving parts for smoother and more efficient movement. However, friction that occurs can cause wear on the bearing surface. This study aims to analyze the wear volume, wear width, and wear rate of ASTM 440C steel material with variations of SAE 10W-30, SAE 10W-40, and SAE 140 lubricants at rotational speeds of 180 rpm, 270 rpm, and 310 rpm. Testing was carried out using a tribometer. ball-on-disc with a constant time of 10 minutes. The test results showed that the lowest wear width was obtained in SAE 10W-40 lubricant of 259.806 µm at 180 rpm, while the highest value of 417.894 µm also occurred in SAE 10W-40 at 270 rpm. The lowest wear volume was recorded in SAE 10W-40 of 0.0225 mm³ at 180 rpm, while the highest was 0.0942 mm³ at 270 rpm with the same lubricant. For the wear rate, the lowest value of 0.50 × 10?? g/mm²·s was found in SAE 140 lubricant at 180 rpm, while the highest was 1.58 × 10?? g/mm²·s occurred in SAE 10W-40 at 270 rpm. Overall, SAE 10W-40 lubricants are more suitable for use at low revs, while SAE 140 lubricants are recommended for high revs due to their greater viscosity and resistance to wear.
Co-Authors Achmad Gus Fahmi Adi Prayoga Adimas, Fransiskus Adryansyah, Rizky Sultan Afriansyah, Aidil Ahmadien, Ichwan Kurnia Aji Suwito Akasah, Ahmad Alfian, Devia G.C. Anugrah, Galang Arirohman, Ilham Dwi Azriel Windiarto Cindi Alfian, Devia Gahana Deendarlianto Devia Gahana Cindi Alfian Devia Gahana Cindi Alvian Dicky Aufa Mahesha Dicky J. Silitonga Dicky Januarizky Silitonga Eko Pujiyulianto Fadillah Ramadhani Farid Jayadi Faturrizky Rakha Yudanta Fellando Martino Nugroho Fitrah Qalbina Fransisco Dino Permadi Gilang Handi Wibowo Gita Johannes Saragih Goklas Miracle Siahaan Guguk, Kardo Raja Harianja, Martua Jaya Harmiansyah Heni Pornawati Hidayatullah, M Taufik Indarto Indarto Irfan Dafa Denara Isak, Rabin Jayadi, Farid Jhonatan Jufrianto Sitorus Kardiansyah Krisna Pratama Wibisono M.Riyan Kaspari Maharani, Ajeng Meha, Gabriel Mufidah, Zunanik Muhammad Firmansyah Suherman Muhammad Lasin Muhammad Syaukani Muhyi, Abdul Ningsih, Wulan Nurullah, Fajar Perdana Oktavirnanda Oktavirnanda P Pasaribu, Frans Winner Pathur Razi Ansyah Paundra, Fajar Prahmana, Rico Aditia Prasetya, Theodorus Rendy Pratama, Muhammad Hasbi Pujiyulianto, Eko Putra Andi Kolala Rahadi, Bagas Nugroho Jati Ramadhan, Ahmad Fikri Ramadhanty, Nabila Riayatsyah, Teuku Meurah Indra Rico Aditia Prahmana Rizky Faesal Sadikin Rodian, Afiko Rori Zarhimsyah Ruly Davisca Pratama Rustam Efendi Ruzaki Fatra Jaya SABAR Sadikin, Rizky Faesal Santoso, Yopi Rusdian Saputra, Aprizal Saragih, Gita Johannes Selamet Riski Amiludin Shintha Sarmila A.S Yahya Silitonga, Dicky Januarizky Sindhu, I Gede Pande Naraya Siregar, Ilham Ramadhan Sugatra Dwi Atmaja Syah, Muhammad Aksel Teuku Meurah Indra Riayatsyah Theodorus Rendy Prasetya Verdia, V Daniel Vicky F Sanjaya Wibawa Endra Juwana Wibawa Endra Juwana WR Supratman Yopi Rusdian Santoso