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All Journal Conference SENATIK STT Adisutjipto Yogyakarta Proceeding ISETH (International Summit on Science, Technology, and Humanity) International Journal of Mechanics, Energy Engineering and Applied Science (IJMEAS)
Rifa'i, Ahmad Imam
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Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering Medicine & Pharmacology Social Sciences Other

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KAJIAN TEORITIK KRAKTERISTIK (PUMP AS TURBINE /(PAT) UNTUK PEMBANGKIT LISTRIK MICROHYDRO Rifa'i, Ahmad Imam; Himawanto, Dwi Aries
SENATIK STT Adisutjipto Vol 3 (2017): Dukungan Teknologi Untuk Pengembangan Industri Dirgantara Indonesia
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/senatik.v3i0.131

Abstract

In recent years, turbine use or pump operation as a turbine (PAT) has become an ongoing alternative to managing Water Distribution Networks (WDNs) in microhydro power generation units. Commercial pumps available on the market have a variety of shapes and models. Generally, pump manufacturers do not provide their pump characteristics curves that work as turbines. This paper presents a theoretical study on the efficiency of pump operation used as turbine (Pump as Turbine). Based on the results of the study, PAT efficiency increases with the specific speed (Nsp) and with special impeller will increase efficiency by 93% 8.07% and 5.45% and efficiency also increased by modifying the thickness of the pump blade.
Static Analysis of Electric Vehicle Prototype Frame Ramadhoni, Tri Satya; Rifa'i, Ahmad Imam; Anwar, Zainuri; Hidayati, Baiti; Sumarna, Herlin; Okviyanto, Toni; Sampurno, Rachmat Dwi
International Journal of Mechanics, Energy Engineering and Applied Science (IJMEAS) Vol. 2 No. 1 (2024): IJMEAS - January
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijmeas.v2i1.242

Abstract

This study aims to determine the strength of the prototype car frame created by the SMES (Sriwijaya Mechanical Engineering Squad) team in participating in the KMHE (Energy Efficient Car Contest) and SEM (Shell Eco-Marathon). This prototype vehicle is an energy-efficient car with an electric motor drive and utilizes a hollow rectangular tube-shaped frame with aluminum 6061 material. The overall dimensions of the car frame are 2500x410x540 mm. Static loading analysis was conducted using manual calculations and computer simulations. Static loading was performed on seven support bars, the main bar, and the overall prototype car frame. Applied loads include the electric motor load, control panel, battery load, driver's body load, driver's legs, front body load, rollbar body load, rear body load, and reaction loads from bars receiving direct loads. Autodesk Inventor software with frame analysis features was used in the simulation process. Based on the results of manual calculations and computer simulations, the difference in the average results of maximum bending moment, maximum stress, and displacement on the seven types of support bars, with a small error tolerance below 10%, is 1.01%, 5.24%, and 3.25%, respectively. Based on computer simulation results for the main bar and seven types of support bars, the highest maximum stress occurs in the main bar, which is 128727.37 N.
Condenser Design on Plastic Oil Distillation Equipment Novarini, N; Kurniawan, Sigit; Rusdianasari, R; Bow, Yohandri; Rifa'i, Ahmad Imam
Proceeding ISETH (International Summit on Science, Technology, and Humanity) 2020: Proceeding ISETH (International Summit on Science, Technology, and Humanity)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (943.92 KB) | DOI: 10.23917/iseth.1285

Abstract

The pyrolysis method is a technology in energy conversion that can be applied in processing plastic waste into alternative fuels in liquid form. The pyrolysis method begins with heating the plastic waste in the reactor at a temperature of more than 400°C so that the thermal degradation process of the material occurs without oxygen content, causing a phase change to the vapor phase. The vapor phase is cooled into the condenser to convert it into a liquid phase to obtain liquid fuel from plastic waste. In this study, the pyrolysis condenser design in changing the vapor phase from the reactor to the liquid phase was designed using water as a coolant on the annular side with a coolant inlet temperature of 25 ° C and a coolant outlet temperature of 35°C. The results showed that an annular side dimension with a diameter of 250 mm and a height of 250 mm was needed to reduce the temperature of the inlet condenser fuel vapor from 60°C to 30°C. Furthermore, the inner pipe of the condenser is made of copper material, which is formed by a spiral with a spiral diameter of 250 mm, an inner diameter of 25 mm, and a tubing length of 4,870 mm.
Co-Authors Anwar, Zainuri Dwi Aries Himawanto HIDAYATI, BAITI Novarini, N Okviyanto, Toni Ramadhoni, Tri Satya Rusdianasari Rusdianasari Sampurno, Rachmat Dwi Sigit Kurniawan Sumarna, Herlin Yohandri Bow