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Yogi Baskoro
PT. PLN Indonesia Power
Computer Science & IT Electrical & Electronics Engineering Mechanical Engineering

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Analisis Kegagalan Pada Ducting Primary Air Fan Menggunakan Metode RCA, CFD, dan FEA Djia Hamdali Suherman; Budi Triyono; Yogi Baskoro; Setyo Wibawono
Infotekmesin Vol 17 No 2 (2026): Infotekmesin: Juli 2026
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/

Abstract

This study analyzes the causes of recurrent cracking in the Primary Air Fan (PAF) ducting of a Circulating Fluidized Bed (CFB) boiler and develops improvement recommendations. The methods comprise field crack mapping, Root Cause Analysis (RCA) using Ishikawa and Fault Tree Analysis, Computational Fluid Dynamics (CFD), and Finite Element Analysis (FEA). Cracks were concentrated at panel edges, stiffener terminations, welded joints, and heat-affected zones. CFD revealed non-uniform flow and vortices at elbow/transition regions, while FEA showed maximum stress increasing from 142 MPa at 40 °C to 224 MPa at 50 °C. A 100 mm panel-edge radius reduced stress from 145 MPa to 36 MPa, or 75.2%. The novelty lies in integrating field evidence, RCA, CFD, and FEA to explain the failure mechanism comprehensively. The findings support more targeted repair strategies to improve PAF ducting reliability and service life.
Co-Authors Budi Triyono Djia Hamdali Suherman Setyo Wibawono