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All Journal Andalasian International Journal of Applied Science, Engineering, and Technology Jurnal Andalas: Rekayasa dan Penerapan Teknologi
Faizal, Jhonny
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Civil Engineering, Building, Construction & Architecture Education Electrical & Electronics Engineering Energy Health Professions Industrial & Manufacturing Engineering Mechanical Engineering Other

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Development of an Energy-Efficient Electrical Load Model for Optimizing Electricity Consumption in the Headquarters Building using the PDCA Approach Budiman, Refki; Faizal, Jhonny
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 5 No. 1 (2025): March 2025
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v5i1.207

Abstract

The increasing electricity consumption in the public building sector has a significant impact on greenhouse gas (CO2) emissions, which is proportional to the volume of energy used. This study aims to develop an energy-efficient electrical load model to optimize electricity consumption in the headquarters building of PT Semen Padang using the Plan-Do-Check-Action (PDCA) approach. In the Plan stage, problem identification was conducted through a Pareto diagram and root cause analysis using a fishbone diagram. The dominant issue identified was energy waste in the lighting system. The solution implemented included the installation of motion sensor-based switch control devices to regulate lighting use automatically. In the Do phase, the devices were installed and tested, while in the Check phase, the evaluation showed a reduction in electricity consumption from over 85,000 kWh per month to below 80,000 kWh per month, resulting in an electricity cost savings of IDR 31 million per month. The Action phase established standards for inputs, processes, and outputs to ensure the sustainability of the improvements made. This study not only provides financial benefits but also supports the company's Energy Management System policy. With the PDCA approach, improvement processes can be carried out systematically and continuously, making a tangible contribution to energy efficiency in the public building sector.
Rekayasa Ulang Pendinginan Transformator Daya Tua dengan ONAF dan Evaluasi Berbasis PDCA untuk Efisiensi dan Keandalan Refki Budiman; Budi, Baik; Faizal, Jhonny
Jurnal Andalas: Rekayasa dan Penerapan Teknologi Vol. 5 No. 2 (2025): Desember 2025
Publisher : Electrical Engineering Department Faculty of Engineering Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jarpet.v5i2.118

Abstract

Transformator daya merupakan aset kritis dalam sistem kelistrikan industri, di mana kegagalannya dapat menyebabkan kerugian produksi yang signifikan. Studi kasus ini menginvestigasi serangkaian kegagalan berulang pada tiga unit transformator daya tua berkapasitas 30 MVA, 150/6,3 kV di PT Semen Padang, yang telah mengakibatkan terhentinya operasional pabrik. Kegagalan-kegagalan ini, yang termanifestasi sebagai kebocoran minyak, aktivasi Pressure Relief Device (PRD), dan trip pemutus daya, secara konsisten berkorelasi dengan suhu operasi yang tinggi. Melalui pendekatan metodologis yang terstruktur, termasuk analisis akar penyebab menggunakan diagram Ishikawa dan Nominal Group Technique (NGT), pemanasan berlebih (overheating) diidentifikasi sebagai penyebab dominan. Sebagai solusi, sebuah sistem pendingin paksa Oil Natural Air Forced (ONAF) otomatis diimplementasikan dengan biaya rendah
Co-Authors Budi, Baik Budiman, Refki Refki Budiman