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All Journal Journal of Mechanical Engineering Science and Technology JOURNAL OF SCIENCE AND APPLIED ENGINEERING Mekanika: Majalah Ilmiah Mekanika G-Tech : Jurnal Teknologi Terapan Journal of Mechanical and Electrical Technology Jurnal Pepadu Jurnal Pengabdian Kepada Masyarakat
Aji, Supa Kusuma
Politeknik Negeri Malang
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

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Pressure Drop and Void Fraction of Two-Phase Flow (Air-Water) in Grooved Vertical Pipes Supa Kusuma Aji; Nicky Suwandhy A. S; Chandra Gunawan; Bayu Pranoto; Hangga Wicaksono
Mekanika: Majalah Ilmiah Mekanika Vol 22, No 2 (2023): MEKANIKA: Majalah Ilmiah Mekanika
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/mekanika.v22i2.76968

Abstract

Two-phase flows consisting of liquids and gases are often found in everyday life and are used on an industrial scale. In an industrial environment, this flow has many weaknesses, including pressure drop and void fraction. One strategy to reduce losses that arise is to use passive methods. The passive method used is to utilize the shape of the grooves in the channel. In this study, the flow is used to determine its effect on the pressure drop and void fraction that appears in two-phase flow. The experimental method was used for this study. The test pipe is equipped with 16 grooves, while the smooth pipe (without grooves) is used as a comparison. The test pipe is made of acrylic material. The water fluid is circulated using a centrifugal water pump with a superficial speed of 0.33-0.42 m/s. Air fluid is supplied using a compressor with superficial speeds of 0.049, 0.066, and 0.082 m/s. Measurement of pressure drop was carried out using a pressure transmitter with an Arduino data logger. The void fraction is calculated by determining the ratio of the volume fraction of water and air in the test tube. The results of the study revealed that the use of 16 grooves in the pipe can reduce the pressure drop and cavity fraction that appears when compared to smooth pipes.
Analysis of the Percentage of Corn Cob Bioethanol Volume with 92 Octane Fuel in Gasoline Engines Yuniarto Agus Winoko; Supa Kusuma Aji; Agus Setiawan; Intan Fadillah
JOURNAL OF SCIENCE AND APPLIED ENGINEERING Vol 7, No 1 (2024): JSAE
Publisher : Widyagama University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31328/jsae.v7i1.5466

Abstract

One way to improve the performance of gasoline engines is by using bioethanol, which can enhance combustion efficiency. Bioethanol, a renewable fuel derived from the fermentation of plant materials, can be blended with traditional fossil fuels to create a more efficient and environmentally friendly fuel alternative. The combination of fossil fuel and fermentation-derived fuel has a significant impact on the overall performance and emissions of the engine. The aim of this study is to determine the magnitude of changes in torque and power when a gasoline engine is fueled with a mixture of corn cob bioethanol and pertamax. Additionally, specific fuel consumption will be determined to evaluate the fuel efficiency. The engine used in this study is a 150cc gasoline motor, a common size for motorcycles and small vehicles. The testing variables include engine speed variations from 2000 to 9500 rpm using bioethanol blends of 5%, 10%, and 15% with 92 octane fuel. The data collected from these tests is calculated mathematically. The results of the study show the largest increase in power at 0.45 horsepower at 2500 rpm and torque at 2.82 Nm at 2500 rpm when using the BE15% fuel blend, indicating a notable enhancement in engine performance with higher bioethanol content. Furthermore, the smallest decrease in fuel consumption was recorded at 0.1739 kg per horsepower, highlighting the efficiency benefits of bioethanol blends. Overall, the engine performance improves when using a blend of 92 octane fuel with bioethanol compared to pure 92 octane fuel. This suggests that incorporating bioethanol into gasoline can not only improve power and torque but also enhance fuel efficiency, making it a viable option for reducing dependency on fossil fuels and lowering emissions.
The Effect of Mixing Time and Rotation Speed on the Consistency of Dough Viscosity in a Horizontal Mixer Rizza, Muhammad Akhlis; Dharsono, Ekky Yovianto; Murdani, Anggit; Monasari, Ratna; Amrullah, Radhi Nurvian; Aji, Supa Kusuma; Khaerudin, Dian Noorvy
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 8, No 2 (2024)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um016v8i22024p460

Abstract

Cassava must go through several manufacturing processes before it becomes chips on the market, including the process of stirring the dough. The stirring process is an important stage in various food industries. In the stirring process, the viscosity change in the dough is influenced by various factors, including the stirring process time and speed in stirring. Research on dough viscosity is important because it is directly related to the quality of the final product. The purpose of this study is to provide recommendations to users, both in the context of using horizontal mixers and the process of making similar products. The type of research used is quantitative research based on experimental methods that aim to test a hypothesis by collecting data that can be measured using statistics, mathematics, and computing. The independent variables in this study are rotation speed (20, 40, and 80 rpm) and stirring time (5 minutes, 10 minutes, and 15 minutes). From these independent variables calculations and data analysis, the optimal setting was obtained using a rotation speed of 80 rpm and a stirring time of 15 minutes with a dough viscosity of 1411.12 PaS. The rotation speed of 80 rpm has more even data or more consistent data compared to the rotation speed values of 20 rpm and 40 rpm.
Experimental Investigation of Air-to-Kapok Oil Ratio Effects on Flame Height and Morphology in a Bunsen Burner Pranoto, Bayu; Supriyanto, Nicky Suwandhy Widhi; Gunawan, Chandra; Aji, Supa Kusuma; Huda, Muhammad Arif Nur
G-Tech: Jurnal Teknologi Terapan Vol 9 No 3 (2025): G-Tech, Vol. 9 No. 3 July 2025
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/g-tech.v9i3.7120

Abstract

The growing global demand for energy highlights the limitations of fossil fuel resources. This makes innovation in alternative energy development crucial, and one promising avenue is the use of vegetable oils like kapok oil. Kapok oil has a complex chemical composition, composed of various triglycerides of fatty acids and glycerol, where each fatty acid component contributes unique combustion characteristics. The interaction of the complexity of this content as a whole affects the flame pattern of kapok oil. Furthermore, the air-fuel mixture ratio (AFR) plays a significant role in determining the characteristics of the resulting flame. Therefore, this study aims to explore in depth the effect of AFR variations on the combustion characteristics of kapok oil. Experiments were conducted by burning a mixture of kapok oil vapor and air on a burner with controlled AFR settings. The results showed that the variation of AFR significantly changed the flame height and morphology. Flame height initially increased with increasing AFR (from 1.34 cm at AFR 0.143:1 to 4.429 cm at AFR 1.526:1) before decreasing (to 0.264 cm at AFR 4.011:1) until it reached the lift-off condition and went out.
PELATIHAN DAN PENDAMPINGAN PENINGKATAN KAPASITAS PRODUKSI DAN PENJUALAN DI UMKM J&R DESA DUWET Rizza, Muhammad Akhlis; Suwarni, Evi; Aji, Supa Kusuma
Jurnal Pengabdian kepada Masyarakat Vol. 12 No. 1 (2025): JURNAL PENGABDIAN KEPADA MASYARAKAT 2025
Publisher : P3M Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/abdimas.v12i1.6645

Abstract

This community service program aims to increase production and sales capacity in MSMEs J&R Duwet Village, Tumpang District, Malang Regency. J&R MSMEs are facing bottlenecks in the drying and sorting process of cassava chip dough, which leads to low production capacity. The solution offered is to make a drying device (oven) with a capacity of 100 kg/hour and a roll system dough filer. In addition, training was provided on packaging and marketing products with new logos to increase sales. The method used in this program is intensive training and mentoring. The result of this service has a significant impact on J&R MSMES. Increased production capacity from 50 kg/hour to 100 kg/hour after the use of new equipment, as well as improved product quality through a more consistent drying process. In addition, packaging and marketing training successfully increased the attractiveness of products in the local market and expanded the sales reach. With the new logo, J&R's MSME products are better known, and sales turnover increased by about 15% in the months following the implementation of the program.
Pengaruh Tegangan Input Dan Variasi Ukuran Gear Terhadap Konsumsi Daya Motor DC 250 Watt Hafizh, Ahmad Raihan; Farida, Nike Nur; Aji, Supa Kusuma; Riskitasari, Septyana
Metrotech (Journal of Mechanical and Electrical Technology) Vol 4 No 3: September 2025
Publisher : Fakultas Sains dan Teknologi, UNIRA Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/metrotech.v4i3.7588

Abstract

Penggunaan kendaraan bahan bakar fosil menghasilkan gas buang yang menyababkan polusi udara. Pengembangan kendaraan listrik di Indonesia merupakan salah satu upaya mengurangi penggunaan bahan bakar fosil serta mengurangi polusi udara. Kendaraan listrik (Electric Vehicle) (EV) telah lama menjadi salah satu terobosan dalam menghadapi perubahan iklim global. Salah satu bentuk kebijakan Pemerintah yaitu dengan terbitnya Perpres Nomor 55 Tahun 2019 tentang Percepatan Penggunaan Kendaraan Listrik dan Inpres No.7 Tahun 2022 tentang Penggunaan Kendaraan Bermotor Listrik Berbasis Baterai (Battery Electric Vehicle). Pemerintah terus mendukung mahasiswa untuk mengembangkan hasil karya kendaraan hemat energi melalui sebuah kompetisi yang dinamakan Kontes Mobil Hemat Energi. Tujuan penelitian ini untuk mengetahui pengaruh tegangan input modul dan penggunaan ukuran gear prototipe mobil listrik Ken Dedes terhadap konsumsi daya motor DC 250 Watt. Prototipe mobil listrik Ken Dedes ini menggunakan penggerak jenis mid drive. Pada penelitian ini menggunakan metode penelitian eksperimental dengan pendekatan kuantitatif. Pengujian dilakukan pada prototipe mobil listrik Ken Dedes dengan penggunaan beberapa variasi ukuran gear dan tegangan input modul dengan jarak tempuh 450 m dengan kecepatan 15 km/jam pada jalan datar. Hasil penelitian ini diharapkan adanya pengaruh tegangan input dan penggunaan variasi ukuran gear terhadap konsumsi daya motor DC 250 Watt. Dapat disimpulkan bahwa tegangan input dan variasi ukuran gear memiliki pengaruh yang signifikan terhadap konsumsi daya. Hal ini menunjukkan bahwa penggunaan gear 24T pada tegangan input 28V sebesar 3,91 Wh/Km merupakan kombinasi yang paling efisien dalam mengurangi konsumsi daya motor.
UPAYA PENURUNAN POTENSI KERAWANAN LINGKUNGAN MELALUI PEMASANGAN PAGAR PENGAMAN DI DESA NGENEP KEC. KARANGPLOSO KAB. MALANG Nurhadi, Nurhadi; Walid, Achmad; Farida, Nike Nur; Monasari, Ratna; Aji, Supa Kusuma; Winoko, Yuniarto Agus
Jurnal Pepadu Vol 6 No 3 (2025): Jurnal Pepadu
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/pepadu.v6i3.7883

Abstract

RT 04 RW 16, Ngenep Village, Karangploso District, Malang Regency faces environmental vulnerability due to a damaged security fence, allowing outsiders to enter and exit freely, increasing the risk of safety disturbances. This problem is worsened by the fact that the housing estate management was abandoned after the developer was declared bankrupt, forcing residents to manage the environment independently. This situation raises concerns about neighborhood security and urges the need for a concrete, collective solution to mitigate the issue. This community service activity aims to reduce environmental vulnerability by designing and constructing a permanent safety fence in a vacant lot prone to security risks as a preventive measure to enhance neighborhood safety. The methods include analyzing the partner's problems, determining priority issues, designing the fence using AutoCAD, and constructing a 7 x 3.25-meter fence consisting of stone foundations, cast pillars, and lightweight brick walls. The results showed that the safety fence was successfully installed as planned, serving as a physical barrier that limits outsider access, enhances residents' sense of security, and fosters community awareness regarding environmental safety. An evaluation of the project revealed a cost efficiency of 17% compared to the initial Budget Plan (RAB). This activity is expected to serve as a practical solution model for other areas facing similar challenges in community-based environmental security management. Moreover, this project has had a positive impact by increasing community solidarity and encouraging a spirit of mutual cooperation among residents to protect their neighborhood environment.
Co-Authors Agus Setiawan Akhlis Rizza, Muhammad Amrullah, Radhi Nurvian Anggit Murdani Bayu Pranoto Chandra Gunawan Denny Widhiyanuriyawan Dharsono, Ekky Yovianto Evi Suwarni, Evi Farida, Nike Nur Gunawan, Chandra Hafizh, Ahmad Raihan Hangga Wicaksono Intan Fadillah Khaerudin, Dian Noorvy Lilis Yuliati Monasari, Ratna Muhammad Arif Nur Huda Nicky Suwandhy Widhi Supriyanto Nurhadi Pranoto, Bayu Riskitasari, Septyana Walid, Achmad Yuniarto Agus Winoko Yuniarto Agus Winoko, Yuniarto Agus