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All Journal KACANEGARA Jurnal Pengabdian pada Masyarakat Jurnal Surya Teknika Jurnal Difusi
Melkias, Alvera Apridalianti
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Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Education Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Social Sciences

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Pelatihan Instalasi PLTS Bagi Siswa/i Jurusan Teknik Instalasi Tenaga Listrik di Sekolah Menengah Kejuruan Negeri 6 Bandung Kastawan, I Made Wiwit; Sodiq, Djafar; Mudawari, Achmad; Saodah, Siti; Melkias, Alvera Apridalianti; Jakariya; Eliana, Bella
Jurnal Difusi Vol. 6 No. 1 (2023): Jurnal Difusi
Publisher : Pusat Penelitian dan Pengabdian Masyarakat (P3M) Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/difusi.v6i1.4677

Abstract

Sekolah Menengah Kejuruan Negeri (SMKN) 6 Bandung merupakan salah satu SMKN terbesar di kota Bandung, berlokasi tepatnya di Jalan Soekarno-Hatta Komplek Riung Bandung Kecamatan Gede Bage. SMKN 6 Bandung memiliki beberapa jurusan, salah satunya adalah jurusan Teknik Instalasi Tenaga Listrik (TITL). Melihat bidang ilmu yang dipelajari, siswa/i jurusan TITL SMKN 6 Bandung dapat dipandang sebagai sumber daya yang memiliki potensi untuk membantu perubahan pola pikir masyarakat agar beralih dari penggunaan sumber energi primer fosil ke energi baru terbarukan (EBT), khususnya surya. Lebih jauh, jurusan TITL SMKN 6 Bandung dapat juga diarahkan untuk tumbuh menjadi tempat/pusat pengembangan EBT. Namun, hasil survei kunjungan awal ke SMKN 6 Bandung menunjukkan bahwa siswa/i jurusan TITL belum memiliki bekal pengetahuan mengenai prinsip pembangkitan energi listrik dari sumber energi surya (PLTS) dan instalasinya. Oleh karenanya, siswa/i jurusan TITL SMKN 6 Bandung perlu dibantu untuk memperoleh dan meningkatkan pengetahuannya tentang PLTS dan instalasinya melalui kegiatan pelatihan. Kegiatan pelatihan ini merupakan langkah awal dari rangkaian kegiatan pelatihan yang akan diusulkan dan dilaksanakan dalam kesempatan selanjutnya yang bertujuan untuk menghasilkan siswa/i yang memiliki pengetahuan dan keterampilan memadai mengenai PLTS dan instalasinya. Setelahnya, siswa/i ini diharapkan dapat menggunakan bekal pengetahuan dan keterampilan yang telah dikuasainya untuk membantu masyarakat sekitarnya dalam memanfaatkan sumber energi primer surya untuk membangkitkan energi listrik.
Evaluasi Kinerja Steam Jet Ejector Tingkat Pertama Terhadap Kevakuman Kondensor Melkias, Alvera Apridalianti; Nuno Gomez, Shahrul
JURNAL SURYA TEKNIKA Vol. 11 No. 1 (2024): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v11i1.7259

Abstract

The steam jet ejector is a device for extracting NCG from the condenser. NCG can increase the pressure in the condenser until a vacuum condition is not reached. The diffuser pressure on the steam jet ejector has a normal operational limit of below 1 atm, meaning that the ejector performance will be optimal if it is operated at the operational limit under vacuum conditions. The expected objectives are to determine the effect of the steam jet ejector on condenser vacuum, calculate the performance of the first level steam jet ejector through pressure analysis in the diffuser section, calculate the performance of the steam jet ejector in actual conditions compared to the design data conditions and analyze actions that can be taken to improve the performance of the tool. Based on the results of calculations and analysis, it was found that the increase in steam jet ejector pressure had an effect on the increase in condenser pressure from the design pressure of 0.10 bar to 0.107-0.123 bar under actual conditions. The decrease in steam jet ejector performance results in the condenser vacuum level decreasing, but the equipment performance is within normal operational limit conditions, namely below 1 atm. The decrease in steam jet ejector performance is influenced by the motive steam mass flow rate, NCG mass flow towards suction, entrainment ratio value, NCG pressure and motive steam pressure which exceeds the design data.
Perancangan Ulang Komponen Condensate Booster Pump pada System Re-Injeksi di PLTP X Adityawarman, Dzaky Fauzan Hilmy; Melkias, Alvera Apridalianti; Prayogo, Sapto
JURNAL SURYA TEKNIKA Vol. 11 No. 1 (2024): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v11i1.7288

Abstract

PLTP X is a power plant located in West Java, at this time PLTP X uses 2 condensate booster pumps that experience a discrepancy between the pump operation area specification and the actual condition. This problem causes vibration and decreased efficiency thus causing damage to the pump components. The purpose of this research itself is to design pump components in the form of impellers, shafts, pegs, & volutes. Another goal is to calculate the energy savings resulting from the design. This research has a quantitative and experimental nature. The data used is operational data of the PLTP X and other secondary data issued by the PLTP X. The required technical specifications are a head ±130 m, a capacity of 60 m3/h, a rotation of 2970 RPM & an efficiency > 60%. Based on the results of this study, it was obtained that the pump is a type of low discharge high pressure centrifuge, then the design of this pump has a head of 128.4 m, a capacity of 60 m3/h, an efficiency of 67% and has succeeded in saving energy of 107586.16 kWh per year at its point of operation.
Analisis Kerusakan pada Rotor Pompa Sentrifugal G-1-12-C di PT X Melkias, Alvera Apridalianti; Indriyani Indriyani; Fachry Fadian
JURNAL SURYA TEKNIKA Vol. 11 No. 2 (2024): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v11i2.8300

Abstract

Damage to a tool can cause the production process to stop and cause downtime. Preventing damage to equipment is by managing the maintenance process. This process includes preventive maintenance, corrective maintenance and predictions of damage (predictive maintenance) which is carried out periodically. Centrifugal pumps have the working principle of converting kinetic energy (speed) of liquid into potential (dynamic) energy through an impeller that rotates in the casing. This pump is an impeller that is mounted on a shaft with bearings at both ends. Damage to the pump rotor has a serious impact on the performance and reliability of the pump system. The rotor is one of the main components responsible for transferring mechanical energy into the pumped fluid, so damage to the rotor can affect pump efficiency, operational life, and damage to pump components. Analysis of damage to the pump rotor was carried out by testing using the NDT method. NDT testing includes Visual Inspection, Magnetic Particle Inspection, Liquid Penetrant and Balancing Rotor. Based on the results of the tests and analysis carried out, it was found that there was damage to several parts of the pump rotor, such as corrosion on the pump shaft, dirt on the surface, and scratches on the mechanical seal seat area with a depth of approximately 0.50 mm. Rotor unbalance or the center of gravity of the shaft rotation is not the same as the geometric center of the shaft. The impeller was found to be in poor condition, high metal of radial impeller and medium to heavy rubbing at wearing impeller. The DE and NDE distance sleeves are not in a bad condition and there are scratches.
Analisis Pengaruh Harmonisa Transformator Distribusi 2500 kVA Melkias, Alvera Apridalianti; Indriyani, Indriyani; Hidayat, Taufik
JURNAL SURYA TEKNIKA Vol. 12 No. 1 (2025): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v12i1.9533

Abstract

The high harmonic content in the electrical load or in the power distribution system can result in worse power quality, lower system power factor, distorted system voltage waveform, increased power losses in the system, overheating of the transformer, and inefficient use of electrical energy. So that it can reduce the efficiency of the transformer. The purpose of this study is to analyze the effect of harmonics on a distribution transformer with a capacity of 2500 kVA using a quantitative data collection method, namely primary and secondary data collection. This study offers an integrated approach that includes harmonic measurements and analysis of direct impacts on the efficiency of a 2500 kVA distribution transformer in the context of the automotive industry, which has not been widely reported in the national literature. Based on the results of measurements and calculations on the transformer, the Total Harmonic Distortion Current (THDI) value is + 9% which exceeds the permissible value of 8% while the Total Harmonic Distortion Voltage (THDV) value is + 2% in accordance with the permissible limit of 5%. The analysis results obtained that due to the presence of harmonics in the electrical distribution system, the distribution transformer experienced a decrease in its efficiency value by 2%, which was originally without harmonics the transformer efficiency was 98.8% and due to the presence of harmonics the transformer efficiency became 96.8%. The combination of real-time harmonic measurements and calculations in the industry not only offers technical advantages, but also strategically supports efficiency, reliability of the electrical system, and smarter data-based decision making.
Pelatihan instalasi PLTS rumah tangga Rooftop untuk siswa dan siswi Jurusan Teknik Instalasi Tenaga Listrik SMKN 6 Bandung Kastawan, I Made Wiwit; Mudawari, Achmad; Mursanto, Wahyu Budi; Melkias, Alvera Apridalianti; Jakariya, Jakariya
KACANEGARA Jurnal Pengabdian pada Masyarakat Vol 7, No 1 (2024): Februari
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/kacanegara.v7i1.1861

Abstract

Teknologi di berbagai bidang terus berkembang dari waktu ke waktu. Salah satu diantaranya adalah teknologi konversi energi dari sumber energi baru terbarukan (EBT). Pemanfataan sumber primer surya untuk pembangkitan energi listrik dapat mendukung program pemerintah terkait energi bersih dan ramah lingkungan.  Sekolah Menengah Kejuruan Negeri (SMKN) 6 Bandung merupakan salah satu SMKN terbesar di kota Bandung, yang berlokasi di Jalan Soekarno-Hatta Komplek Riung Bandung, Kecamatan Gede Bage. SMKN 6 Bandung memiliki beberapa jurusan, salah satunya adalah jurusan Teknik Instalasi Tenaga Listrik (TITL). hasil survei awal ke jurusan TITL SMKN 6 Bandung menunjukkan bahwa secara umum siswa-siswinya belum memiliki bekal ilmu pengetahuan dan keterampilan terkait teknologi pembangkitan energi listrik dari sumber energi surya (PLTS), termasuk PLTS untuk rumah tangga (PLTS Rooftop). Tujuan dari pelatihan ini akan difokuskan untuk meningkatkan ilmu pengetahuan siswa-siswi jurusan TITL SMKN 6 Bandung mengenai PLTS yang dibangun khusus untuk memenuhi kebutuhan energi listrik di sebuah rumah tangga (PLTS Rooftop) serta meningkatkan keterampilan instalasi PLTS Rooftop yang mengarah pada sertifikasi kompetensi.
Co-Authors Adityawarman, Dzaky Fauzan Hilmy Eliana, Bella Fachry Fadian I MADE WIWIT Indriyani Indriyani Indriyani Indriyani Jakariya Jakariya, Jakariya Mudawari, Achmad Mursanto, Wahyu Budi Nuno Gomez, Shahrul Prayogo, Sapto SITI SAODAH SODIQ, DJAFAR Taufik Hidayat