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All Journal Syntax Literate: Jurnal Ilmiah Indonesia International Journal of Social Service and Research Indonesian Journal of Multidisciplinary Science Asian Journal of Social and Humanities
Zhiliang, Wang
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Humanities Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Mathematics Public Health Social Sciences Other

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Optimization of the Protection Interlocking Function of a 56 MW Unit Steam Turbine Zhiliang, Wang; Hongwei, Feng; Ihsan, Muhammad
Syntax Literate Jurnal Ilmiah Indonesia
Publisher : Syntax Corporation

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36418/syntax-literate.v9i12.55146

Abstract

There are 2 x 56MW units in Kendari power plant, each unit is equipped with two 100% capacity electric feed pumps, one running and another one backup. During the operation of the unit, two defects, such as large vibration of the BFWP and high temperature of the thrust pad on the working face, were found to affect the operation. The large vibration of the BFWP is mainly due to the falling off of the positioning pin of the bearing bracket of the non-drive end, which causes the center to sink, and the balance drum and the balance sleeve are rubbed dynamically and statically. The main reason for the high temperature of the thrust pad of the BFWP is that the diameter of the balance drum is small, which leads to an increase in the axial thrust borne by the thrust pad of the working face, and the high temperature of the tile. This study aims to diagnose the root causes of these defects, implement corrective measures, and optimize pump performance to enhance operational safety. A combination of on-site inspections, data analysis, and engineering interventions was conducted. Findings indicate that structural realignment and reengineering of the balance drum significantly mitigated vibration and temperature issues. The study concludes that proactive maintenance and design optimization are essential for the reliable operation of power plant equipment, with implications for enhancing long-term efficiency and safety.thrust padthrust pad
Research on Maintenance Optimization and Performance Enhancement of a Medium-Speed Roller Mill Zhiliang, Wang
Indonesian Journal of Multidisciplinary Science Vol. 5 No. 2 (2025): Indonesian Journal of Multidisciplinary Science
Publisher : International Journal Labs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55324/ijoms.v5i2.1219

Abstract

The medium-speed roller mill at Kendari-3 Power Plant’s Unit 2 experienced significant wear, efficiency decline, and operational instability due to prolonged continuous operation, necessitating a systematic optimization approach. This study aims to analyze, implement, and evaluate maintenance optimization strategies to restore and enhance mill performance, while establishing a structured preventive maintenance framework for long-term reliability. A research methodology combining engineering inspection, technical diagnostics, overhaul execution, and quantitative performance testing was employed. The technical interventions included optimization of the maintenance layout, upgrading of critical material components, enhancement of sealing systems, fine adjustments of operational parameters, expansion of air duct capacity, and the development of a performance-based preventive maintenance file. Performance data were collected before and after the overhaul to measure operational gains. The results demonstrate that the mill’s rated output was successfully restored and stabilized at ?35 t/h, accompanied by a 3% reduction in specific power consumption under full-load conditions. Furthermore, the service life of grinding rollers increased by approximately 30%, while total maintenance duration was reduced by 20%, indicating substantial improvements in reliability, efficiency, and maintainability. This research provides valuable technical insights and practical references for optimizing pulverizing systems in thermal power plants and contributes to engineering-based decision-making for equipment maintenance strategies.
Analysis of Low-Temperature Corrosion Mechanism and Optimization of Corrosion Resistance of Air Preheater for Boiler 2 at PLTU IPP Sumsel5 Zhiliang, Wang
International Journal of Social Service and Research Vol. 5 No. 12 (2025): International Journal of Social Service and Research
Publisher : Ridwan Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46799/ijssr.v5i12.1346

Abstract

As an important heating surface component of the boiler, the air preheater's operating condition directly affects the unit's combustion efficiency and economy. During the operation of Boiler No. 2 at PLTU IPP Sumsel5, the cold-end modules of the air preheater were exposed to a low-temperature, high-humidity, and highly acidic flue gas environment for an extended period, leading to varying degrees of low-temperature corrosion and air leakage. This resulted in an increase in the unit's exhaust gas temperature, higher load on the induced draft fan, and limited load-bearing capacity. This paper analyzes the mechanism of low-temperature corrosion at the cold end of the air preheater and proposes a technical transformation of the cold-end tube box during unit maintenance, utilizing a new tube box structure with corrosion-resistant and wear-resistant enamel protection technology. After the transformation, the operational health and reliability of the air preheater were significantly improved, the air leakage rate was reduced, boiler efficiency increased, and the plant electricity consumption rate effectively decreased, achieving excellent technical and economic outcomes. Beyond these immediate technical benefits, the retrofit demonstrates how corrosion-resistant technologies can contribute to long-term sustainability goals, reduce environmental emissions, and provide a replicable model for other power plants facing similar challenges.
Development of Rooftop Photovoltaic Resources in Factory Building Complexes and Energy Efficiency Improvement Under Self-Generation and Self-Consumption Mode Zhiliang, Wang
Asian Journal of Social and Humanities Vol. 4 No. 3 (2025): Asian Journal of Social and Humanities
Publisher : Pelopor Publikasi Akademika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59888/xrayky08

Abstract

In response to national energy conservation and emission reduction requirements, the company has systematically implemented rooftop photovoltaic (PV) development across its three thermal power plants to promote green, low-carbon transformation. This qualitative case study analyzes operational data, project documentation, and performance indicators from these sites over two years. By utilizing rooftops of dormitories, offices, and factory buildings, a distributed PV system for self-consumption was constructed, reducing overall plant power consumption and boosting energy efficiency. Quantitative results show annual external electricity purchases dropped by 8–12%, with peak daytime self-consumption rates of 85–90%. The system yielded replicable outcomes in management, operations, and collaboration. Through comprehensive planning, standardized construction, robust maintenance, and performance evaluation, PV operational stability and profitability improved significantly, offering thermal power firms a path to "promote construction through utilization and emission reduction through construction." Beyond cost savings, distributed PV forms a cornerstone for sustainability strategies, enabling hybrid systems that balance fossil-based generation with renewables. This study provides a replicable framework for industrial-scale rooftop PV and empirical evidence for self-consumption models in thermal power settings.
Co-Authors Hongwei, Feng