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All Journal ELKHA : Jurnal Teknik Elektro Buletin Ilmiah Sarjana Teknik Elektro
Agus R Utomo
Universitas Indonesia
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Industrial & Manufacturing Engineering

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Techno – Economic Analysis of Rooftop Solar Panel Uprating on Commercial Building (Casestudy on Karawang Branch Office of XYZ Company) Aji Nur Widyanto; Muhamad Arya Krisna Adhi; Faiz Husnayain; Agus R Utomo; I Made Ardita
Buletin Ilmiah Sarjana Teknik Elektro Vol. 5 No. 1 (2023): March
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/biste.v5i1.7579

Abstract

On April 22nd, 2016, Indonesia signed the Paris Agreement, which goal is that the world will enter the net-zero emission phase in 2060. To support that, it is better to increase the solar rooftop capacity have been installed. In this study, there are some variations, such as the capacity of solar rooftops based on load profile and installed power (75%, 90%, and 100%), variation of solar module placement, and variation of solar module types. The result shows that to fulfill the load needs, it will need 40 kW of inverter capacity and 49.5 kWp of PV capacity with a total module of 113 pcs. Based on the solar module type simulations result, the 440 Wp B – brand has the highest performance result among the others. Uprating solar rooftop capacity will cost around Rp.1,138,529,870 for the investment, and the payback period is around 18 years. This study finds that uprating the capacity of rooftop solar panel can reduce electricity tariffs and increase energy production. Moreover, the results of the economic analysis revealed that the initial cost, interest rate, and electricity price will play crucial roles in determining whether to launch a project or not.
Designing Air-Cored Axial Flux Permanent Magnet Generator with Double Rotor Aji Nur Widyanto; Rahmat Ariwidayat; Faiz Husnayaian; Amien Rahardjo; Agus R Utomo; I Made Ardita
ELKHA : Jurnal Teknik Elektro Vol. 14 No. 1 April 2022
Publisher : Faculty of Engineering, Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/elkha.v14i1.53048

Abstract

The development of renewable energy is carried out to reduce the use of fossil energy, which is decreasing in existence, increasing in price, and having a very long recovery cycle. One of the uses of technology to support renewable energy development is a synchronous machine that can be used to utilize wind and water energy. One type of synchronous machine that is widely used today is the radial flux machine. However, there is a saturation point in their development. Axial flux machines also called disc type machines, are an alternative to radial flux machines due to their compact shape and high-power density. Axial flux machines can be operated as small to medium-scale power plants. Besides that, they are ideal for low-speed applications. An axial flux permanent magnet (AFPM) generator is designed and built in this study. This generator design consists of a dual rotor with twelve permanent magnets and a single stator with nine coils. The primary material used for the stator and rotor is acrylic, while the permanent magnet uses neodymium N52. It is necessary to know the stator and rotor parameters such as distribution factor (kd), pitch factor (kp), and winding factor (kw) for designing the AFMP generator. The AFPM generator is designed to produce a phase voltage of 4.03 V at a nominal speed of 500 r/min. Based on the measurement results, it was found that the phase voltages at a rotating speed of 500 r/min for each phase are VR = 2.94 V, VS = 2.97 V, and VT = 2.95 V. There are differences in the test results and the design. It can be caused by design simplicity that does not consider magnetic saturation and internal reactance, which cannot be ignored but is not included in the calculation.
Co-Authors Aji Nur Widyanto Amien Rahardjo Faiz Husnayaian Husnayain, Faiz I Made Ardita Muhamad Arya Krisna Adhi Rahmat Ariwidayat