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INDONESIA
Jurnal Surya Teknika
Published by Universitas Muhammadiyah Riau
ISSN : 23546751     EISSN : 27237222     DOI : 10.37859
Core Subject : Engineering,
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering
a media of communication and reply forum for scientific works especially concerning the fields of industrial technology, machinery, and automotive.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 384 Documents
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Analisis Preventive Maintenance Motor Condensate Extraction Pump 10,5kv Unit 6 di PT PLN Indonesia Power UBP Suralaya Rahyadi, Sandi; Desmira , Desmira
SURYA TEKNIKA Vol 12 No 2 (2025): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v12i2.10445

Abstract

Penelitian ini menganalisis preventive maintenance pada motor Condensate Extraction Pump (CEP) 10,5 kV Unit 6 di PT. PLN Indonesia Power UBP Suralaya. Tujuannya adalah mengevaluasi kondisi bekerja motor dengan mengukur temperatur belitan, temperatur bearing, dan getaran (vibrasi) sebagai tanda utama kinerjanya. Penelitian dilakukan dengan cara mengamati langsung, wawancara oleh teknisi, membaca buku referensi, serta menganalisis data hasil pengukuran menggunakan alat thermogun dan vibration meter. Hasil menunjukkan temperatur belitan berkisar antara 41°C hingga 52°C (batas maksimum 110°C), temperatur bearing berkisar antara 38°C hingga 53°C (batas maksimum 90°C), dan getaran (vibrasi) berkisar antara 0,35 hingga 0,60 mm/s, yang jauh di bawah ambang batas maksimum 2,8 mm/s sesuai SNI ISO 10816-3:2011. Persentase error untuk ketiga parameter tersebut berada di bawah 4%, yang menunjukkan motor bekerja dalam kondisi stabil dan efisien. Dengan demikian, penerapan preventive maintenance terbukti efektif dalam menjaga kinerja sistem dan memperpanjang masa pakai motor.
Pengaruh Paparan Gelombang Ultrasonik pada Ekstraksi Bunga Telang Terhadap Kandungan Senyawa Flavonoid Bilqis Widiawati, Febriana; Mustikaningrum, Mega
SURYA TEKNIKA Vol 12 No 2 (2025): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v12i2.10489

Abstract

The study aims to determine the effect of ultrasonic wave exposure on the extraction of butterfly pea flowers (Clitoria ternatea L.) toward flavonoid compound content. The method used was Ultrasonic Assisted Extraction (UAE) with variations in temperature 30oC, 40oC, 50oC, extraction time 20, 25, 30 minutes, and ethanol solvent volume 50, 100, 150 ml. analysis was carried out using a UV-Vis Spectrophotometer. The results showed that the optimal extraction time was 25 minutes with a yield of 45,51%, the optimal temperature was 40oC with a yield of 24,6%, and optimal solvent volume was 100 ml with a yield of 43,05%. Kinetic analysis indicated that the Pseudo Second Order model was the most suitable with a regression value of 0,99989. The extraction process was dominatetd by physical diffusion with an activation energy of 8,4621 kJ/mol, indicating that increasing temperature enhances extraction rate without significant degradation of active compounds.
Evaluasi Penerapan Pengendalian Kualitas pada Proses Produksi UKM Sepatu Kulit di Kota Batam Sumantika, Arsyad; Sirait, Ganda; Paskaria Lodya Tarigan , Elsya; Aji Prasetyo, Bahariandi
SURYA TEKNIKA Vol 12 No 2 (2025): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v12i2.10513

Abstract

This study evaluates quality control in leather shoe Small and Medium-sized Enterprises (SMEs) in Batam City using Failure Mode and Effects Analysis (FMEA) and Root Cause Analysis (RCA) methods. The background addresses product quality challenges affecting SME reputation and competitiveness. The research aims to identify potential failure modes, calculate Risk Priority Numbers (RPN), determine root causes, and formulate improvement recommendations. The methodology involves a hypothetical case study, applying FMEA to identify failure modes (Severity, Occurrence, Detection) and RCA (5 Whys, Fishbone Diagram) for root causes. FMEA results highlight "untidy/broken stitches" (RPN 360) and "cutting pattern errors" (RPN 336) as top priorities. RCA identified root causes such as insufficient operator training, suboptimal raw material procurement policies, inadequate machine maintenance, operator fatigue, and dull cutting tools. The study concludes by successfully identifying critical areas and root causes of quality issues. Recommendations include enhancing training, standardizing processes, preventive maintenance, and investing in precise equipment for SMEs.
Implementasi HarmonicBalance.jl untuk Menentukan Performansi Isolator Getaran Nonlinear Quasi-Zero Stiffness Adriyan, Adriyan
SURYA TEKNIKA Vol 12 No 2 (2025): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v12i2.10574

Abstract

Isolasi getaran merupakan sebuah teknik pengendalian getaran untuk mereduksi transmisi getaran dari sumber gangguan ke objek yang diisolasi. Kajian ini menyajikan penentuan performa suatu isolator nonlinier pada komponen gaya pemulih dan gaya peredamannya berdasarkan variasi redaman nonlinier dan amplitudo eksitasi. Selanjutnya, eksitasi harmonik dikenakan ke isolator dan jawab steady-state dalam ranah frekuensi ditentukan melalui penerapan metode harmonic balance (HB). Berdasarkan penerapan metode ini diperoleh transmisibilitas isolator yang digunakan sebagai metrik untuk menentukan performanya. Metode HB ini digunakan melalui implementasi paket program Julia yang bernama HarmonicBalance.jl. Berdasarkan simulasi yang telah dilakukan diketahui bahwa redaman nonlinier memberikan dampak yang signifikan bagi isolator untuk mereduksi transmisibilitas terutama ketika amplitudo eksitasi besar.

Page 39 of 39 | Total Record : 384

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