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All Journal Jurnal MEKANIKAL Jurnal Sains dan Teknologi Rekayasa Mesin Jurnal Mechanical Jurnal Nasional Pendidikan Teknik Informatika (JANAPATI) Dharma Raflesia : Jurnal Ilmiah Pengembangan dan Penerapan IPTEKS Jurnal Teknik Mesin Aceh International Journal of Science and Technology Jurnal Polimesin Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin
Afdhal Kurniawan Mainil
Universitas Bengkulu
Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering 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 Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

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Journal : Jurnal Polimesin

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Design of photovoltaic/thermal (PV/T) with heat pipes as a heat transfer medium used for water heater Rahmat Iman Mainil; Afdhal Kurniawan Mainil; Azridjal Aziz; Faisal Afif
Jurnal POLIMESIN Vol 21, No 2 (2023): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i2.3298

Abstract

One of the main obstacles for developers and users of photovoltaic (PV) modules is that the module temperature is too high due to high solar radiation and a higher ambient temperature, which reduces PV efficiency. A photovoltaic/thermal (PV/T) system is a technique developed for absorbing heat, that combines PV with a solar thermal collector (STC). In this research, heat pipes are used as the heat transfer medium. This paper aims to design a PV/T system for water heating and examines the thermal performance and water temperature that can be achieved by PV/T. In designing PV/T, the method used is to estimate the intensity of solar radiation and determine the size of the thermal collector, thermal insulation, type of working fluid, and heat pipe filling ratio. The PV/T thermal performance is also tested after the system design has been built. The design parameters that have been obtained are the PV area of 0.67 m2 and the volume of heated water of 20 liters. This design proposes water as the working fluid of the heat pipe with a filling ratio of 10%. The system performance indicates that PV/T could heat the water to 50.9 °C with energy absorbed by the water of 1.85 MJ, and the maximum thermal efficiency of PV/T is 27.14%. The results show that PV/T has a very promising future in terms of its ability to use heat energy and can be further developed for future research so that it can encourage people to use environmentally friendly renewable energy
Experimental study on a laboratory-scale archimedes screw turbine using pitch-to-diameter ratio for low-head hydropower Helmizar Helmizar; Nurcholish Windiharto; Yovan Witanto; Afdhal Kurniawan Mainil; Rahmat Iman Mainil; Khotso Sai
Jurnal Polimesin Vol 23, No 3 (2025): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i3.6690

Abstract

The Archimedes screw is a hydropower technology well-suited for low-head applications This study investigates the performance of a laboratory-scale Archimedes screw turbine for low-head hydropower applications by varying pitch-to-diameter ratio (P/D = 0.3, 0.38, 0.45, 0.52) and inclination angle (β = 22°, 25°, 27°). Experiments were conducted in a controlled water flow environment to evaluate torque, power output, and efficiency at different rotational speeds. Results indicate that both P/D and β significantly influence energy conversion. The highest performance was achieved at P/D = 0.45 and β = 22°, producing a peak torque of 0.36 Nm, a power output of 2.4 W, and a maximum efficiency of 52.37%. Lower inclination angles contributed to improved hydraulic energy capture due to better water filling and reduced slippage. These findings highlight the importance of optimizing geometric parameters to enhance turbine performance in small-scale, sustainable energy systems. The results offer design guidance for implementing Archimedes screw turbines in rural or off-grid low-head hydropower scenarios.
Co-Authors Adi Hans Purba Agus Nuramal Ahmad Fauzan Suryono Aulian Samri Azridjal Aziz Dani Ikhsan Putra Dri Asmawanti-s Faisal Afif Fauzan Andreas Fauzan Andreas Gusta Gunawan Helmizar Helmizar - Hendri van Hoten Heni Nopianti Huda, Widya Nurul Ida Ayu Putu Sri Widnyani Izzudin Ali Raja Siregar Julia Purnama Sari Khotso Sai M Akmal Muhammad Faizal Syukrillah Nanda Nurbaiti Nurbaiti Nurbaiti Nurcholish Windiharto Nurul Deswita Nurul Iman Supardi Oktoeberza, Widhia KZ Permadi, Agung Imam Rahman, Muhammad Farchan Al Rahmat Iman Mainil Renhard Niptro Gultom Sarwo Fikri Satria, Miko Sayfri Syafri Silitonga, Jhonson Van Syafri ' Vasiguhamiaz, Azvadennys Wandi Wahyudi Winata, Alben Sindhu Yovan Witanto