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All Journal Otopro JURPIKAT (Jurnal Pengabdian Kepada Masyarakat) Research in Education, Technology, and Multiculture
Indra Herlamba Siregar
Universitas Negeri Surabaya
Automotive Engineering Dentistry Education Energy Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences

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ENERGI KONSERVASI PADA POMPA SENTRIFUGAL DENGAN TORQUE FLOW IMPELLER SEMI OPEN DAN CLOSED PADA PENGATURAN KAPASITAS Indra Herlamba Siregar
Otopro Vol 15 No 2 Mei 2020
Publisher : Jurusan Teknik Mesin Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/otopro.v15n2.p54-58

Abstract

Pumps are the most widely used rotating equipment in both the domestic and industrial sectors with a contribution of around 3% of the world's electrical energy usage, in addition to the size of pumps available with many incompatible requirements, it is necessary to regulate their capacity. In this article, there are two capacity setting methods tested, namely valve opening and variable speed drive on semi open and closed centrifugal pump torque flow impeller with blades of 7, 8 and 9. The results explain that in valve opening method the number of blades affects the power consumption pump electricity, although not significant enough, while the variable speed drive method, the number of blades has no effect. However, the power consumption of the impeller closed is lower than the semi open impeller in the valve opening method and there is no significant difference in the variable speed drive method. The capacity setting method with a variable speed drive consumes less electric power than the valve opening method, if the flow of pump more decrease from the initial condition the greater the savings obtained with the variable speed drive method than the valve opening method.
PENGARUH JUMLAH BILAH PENGARAH ANGIN JENIS OMNIDIRECTIONAL TERHADAP KINERJA MODEL TURBIN ANGIN SAVONIUS Indra Herlamba Siregar; Moch Effendy; Akhmad Hafidz Ainur Rasyid
Otopro Vol 18 No 2 Mei 2023
Publisher : Jurusan Teknik Mesin Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/otopro.v18n2.p65-70

Abstract

Recently, many countries are looking for alternative energy sources that are renewable and environmentally friendly, one of which is wind energy, with Indonesia's wind energy potential of 9 GW and relatively low wind speeds and geographical position, it is necessary to develop wind turbine technology that is suitable for wind characters in Indonesia. In this research, an omnidirectional wind director model (ODGV) is developed around the savonius wind turbine which aims to improve the performance of the savonius wind turbine model. The ODGV consists of several blades that function to direct the wind at 45o  counterclockwise, with the aim of accelerating the flow so as to increase the positive torque of the concave side blades and reduce the negative torque of the convex side blades of the savonius wind turbine model. An open-type wind tunnel was used to test the savonius wind turbine model with ODGVs. Five ODGVs were developed in this study, using 4, 6, 8, 12, and 16 directional blades with a width of 5cm. The data were analyzed using descriptive analysis. The results show that the ODGV can substantially improve the rotor performance, depending on the number of directional blades. The ODGV with 12 directional blades produced the greatest effect on the performance of the savonius wind turbine model at Re = 93269 which could increase the Cp 69.15% more than the savonius wind turbine model without ODGV. As the Reynolds number increases, the ODGV tends to significantly improve the performance of the savonius wind turbine model.
Workshop Desain Produk Menggunakan Software CAD untuk Siswa SMA/SMK di Sekolah Indonesia Kota Kinabalu Malaysia Priyo Heru Adiwibowo; Ahmad Saepuddin; Akhmad Hafizh Ainur Rasyid; Muhammad Effendy; Muhaji; I Made Arsana; A Grummy Wailanduw; Indra Herlamba Siregar; Ika Nurjannah; Bellina Yunitasari; Aris Purwanto; Agung Prijo Budijono; Anovan Fadhil Muhammad
JURPIKAT Vol 7 No 1 (2026): 7.1 2026
Publisher : Politeknik Piksi Ganesha Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37339/jurpikat.v7i1.2937

Abstract

Workshop Desain Produk menggunakan software CAD merupakan bagian dari kegiatan Pengabdian kepada Masyarakat (PkM) yang diselenggarakan oleh Program Studi S1 Teknik Mesin Universitas Negeri Surabaya di Sekolah Indonesia Kota Kinabalu (SIKK). Kegiatan ini bertujuan meningkatkan keterampilan digital dan kreativitas siswa SMA/SMK melalui pembelajaran desain berbantuan komputer menggunakan perangkat lunak open source FreeCAD. Workshop dilaksanakan selama satu hari dengan materi pengenalan CAD dan FreeCAD, navigasi antarmuka, alur kerja desain produk, serta praktik pembuatan model tiga dimensi sederhana. Evaluasi kegiatan dilakukan melalui penyebaran angket kepada 30 peserta untuk mengukur pemahaman materi, kemudahan penggunaan aplikasi, kualitas fasilitator, dan manfaat kegiatan. Hasil evaluasi menunjukkan respons yang sangat positif, dengan lebih dari 85% peserta menyatakan terbantu dan memperoleh keterampilan baru. Selain itu, dokumentasi kegiatan dan penandatanganan Implementation Agreement (IA) antara UNESA dan SIKK memperkuat kerja sama kelembagaan. Secara keseluruhan, workshop ini efektif meningkatkan kompetensi digital dan motivasi siswa serta berpotensi dikembangkan sebagai program pelatihan berkelanjutan
Optimizing Performance of Electric Vehicle Charging Systems Using Solar PV Tree Models Aris Ansori; Priyo Heru Adiwibowo; Indra Herlamba Siregar; Grummy Wailanduw; Saiful Anwar; Edy Herianto Majlan
Research in Education, Technology, and Multiculture Vol 5, No 3 (2026): Research in Education, Technology, and Multiculture
Publisher : Institute of Multidisciplinary Research and Community Service

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61436/rietm/v5i3.pp280-292

Abstract

The transition to electric vehicles in the transportation sector has had a positive impact on reducing carbon emissions. However, the availability of electricity from renewable energy sources to charge electric vehicles (EVs) remains very limited in both rural and urban areas. The abundant potential of renewable energy sources, such as solar energy, presents challenges in their application as a power source for charging electric vehicles. This study aims to design and analyze the performance of electric vehicle charging using a solar PV tree model. The solar PV installation uses a 152.4 mm diameter iron pipe, with four solar PVs installed in a circle at 90° intervals and a tilt angle of 15°. Eight solar PV trees are installed in a row on the side of the road in the city of Surabaya, geographically located at latitude south 7°9′-7°21′ and longitude east 112°36′-112°54′. The solar PV tree performance measurement method uses IEC 61724-1. The measured electrical parameters consist of voltage, current, power, and solar PV energy efficiency. Electrical energy measurement is divided into two measurements: electrical energy directly used to charge electric vehicles using a kWh meter, and electrical energy stored in energy storage batteries. Solar PV performance testing uses two types of EV loads: an electric car with a charging capacity of 37.9 kWh and an electric bicycle with a charging capacity of 1.75 kWh. Solar PV testing with a tree model can increase sunlight capture with a leaf-like installation model, and it is easy to place in a park or along the roadside. A solar PV system with a capacity of 8 kWp can produce an average of 18.9718 kWh/day, with an efficiency of 2.63% when the sky is clear and sunlight lasts 8 hours. This solar power plant can charge electric bicycles with 1.22 kWh from a full capacity of 1.75 kWh, and electric cars with 14.31 kWh from a full capacity of 37.9 kWh, with an energy loss of approximately 11.5% during charging. Meanwhile, in terms of economic feasibility, with an electricity price of IDR 2,950/kWh, charging electric vehicles (EVs) is economically feasible with a Benefit Cost Ratio (BCR) of 1.23. The solar power plant's investment capital will be returned in eleven years and two months.Keywords: Solar PV trees, EV charging, Electric vehicles, Renewable energy.
Co-Authors A. Grummy Wailanduw AGUNG PRIJO BUDIJONO Ahmad Saepuddin Akhmad Hafidz Ainur Rasyid Anovan Fadhil Muhammad Aris Ansori Aris Purwanto Bellina Yunitasari Edy Herianto Majlan HAFIZH AINUR RASYID, AKHMAD I Made Arsana Ika Nurjannah Moch Effendy Muhaji Muhammad Effendy Priyo Heru Adiwibowo Saiful Anwar