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All Journal SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Jurnal Pengabdian Masyarakat Mentari
Ardiansyah, Teddy
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Religion Automotive Engineering Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

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Performance Evaluation and Optimization of Chiller Systems: A Data-Driven Approach to Enhancing Energy Efficiency Marbun, Rupdin; Ardiansyah, Teddy; Nofirman, Nofirman
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol. 19 No. 1 (2025): SINTEK JURNAL
Publisher : Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/sintek.19.1.11-24

Abstract

Chiller systems account for a significant portion of energy consumption in industrial and commercial HVAC operations, often exceeding 50% of total power usage. However, inefficiencies such as elevated condenser pressure, inadequate heat transfer, and excessive compressor workload contribute to increased energy demand. This study presents a comprehensive performance evaluation of water-cooled centrifugal chiller systems based on 30 operational test scenarios. Key efficiency indicators—including Coefficient of Performance (COP), Specific Energy Consumption (SEC), and isentropic efficiency—were analyzed to identify performance gaps. The results revealed COP values ranging from 1.92 to 4.07, with an average between 2.8 and 3.2, indicating suboptimal performance relative to industry benchmarks (COP > 4). SEC values between 1.07 and 1.25 kW/ton further highlight opportunities for energy optimization. High condenser pressure (>7.5 barg) and negative subcooling (-4.1 K to 0 K) were identified as major contributors to inefficiency. The study emphasizes that optimizing water flow rates and maintaining proper heat exchanger conditions can significantly improve system performance. Unlike previous research relying on AI or IoT-based diagnostics, this work adopts a practical, data-driven approach, offering actionable insights for facility managers seeking to enhance energy efficiency and operational reliability.
Peningkatan Kewaspadaan Bahaya Kebakaran Melalui Kegiatan Sosialisasi Bagi Siswa-Siswi SMK di Jakarta Selatan Ardiansyah, Teddy; Virgian, Edo Widi; Putra, Muzaiyin Arika; Ismawan, Ade Reza
Jurnal Pengabdian Masyarakat Mentari Vol. 2 No. 9 (2026): April
Publisher : Amirul Bangun Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59837/jpmm.v2i9.263

Abstract

Kebakaran merupakan salah satu bencana yang sering terjadi di kota-kota besar, termasuk wilayah DKI Jakarta, dengan potensi kerugian harta benda dan korban jiwa yang besar, terutama di lingkungan padat penduduk. Kegiatan pengabdian masyarakat ini bertujuan untuk meningkatkan kesadaran dan kewaspadaan siswa SMK terhadap bahaya kebakaran, serta memberikan pelatihan praktis penggunaan Alat Pemadam Api Ringan (APAR). Metode yang digunakan dalam kegiatan ini meliputi penyampaian materi edukatif tentang penyebab kebakaran, cara pencegahannya, serta fungsi dan perbedaan jenis-jenis APAR. Kegiatan ini juga dilengkapi dengan diskusi interaktif dan simulasi praktis penggunaan APAR dalam situasi kebakaran. Hasil evaluasi menunjukkan bahwa sebagian besar siswa belum mengetahui langkah-langkah yang harus diambil saat terjadi kebakaran, serta belum paham dengan cara penggunaan APAR. Namun, melalui sosialisasi ini, tingkat kewaspadaan siswa terhadap potensi bahaya kebakaran meningkat, dan mereka memperoleh pengetahuan praktis tentang penggunaan APAR untuk mencegah kebakaran. Sekitar 90% siswa-siswi yang hadir mengatakan bahwa mereka lebih percaya diri dalam menggunakan APAR.
Co-Authors Ismawan, Ade Reza Marbun, Rupdin Nofirman, Nofirman Putra, Muzaiyin Arika Virgian, Edo Widi