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Gas turbine preventive maintenance optimization using genetic algorithm

Author

Listed:
  • Fatemeh Moinian

    (Middle-East Turbo Compressor. (Turbotec) Co)

  • Hamed Sabouhi

    (Middle-East Turbo Compressor. (Turbotec) Co)

  • Jafar Hushmand

    (Middle-East Turbo Compressor. (Turbotec) Co)

  • Ahmad Hallaj

    (Middle-East Turbo Compressor. (Turbotec) Co)

  • Hiwa Khaledi

    (Middle-East Turbo Compressor. (Turbotec) Co)

  • Mojtaba Mohammadpour

    (Middle-East Turbo Compressor. (Turbotec) Co)

Abstract

The tremendous impact of an optimized maintenance program on system overall cost and reliability leads various industrial managers and owners to seek an intelligent tool for maintenance decision making. Gas turbine industry is no exception, since it is of the most expensive and critical components in both power plant and oil and gas industries. In this paper an intelligent maintenance optimization tool is developed based on genetic algorithm. Genetic algorithm is a heuristic optimization method in which genetic evolution patterns are employed. The algorithm has been used for solving several optimization problems and its ability to find optimized solutions makes it one of the most used algorithms. The main purpose of proposed algorithm is to make the balance between maintenance costs (i.e. direct and indirect) and down time cost while maintaining system availability on predefined level. Moreover, maintenance constraints such as task interval, maintenance duration are considered. To handle these constraints, new repair operators are defined and applied in the proposed genetic algorithm, besides other crossover and mutation operators. In order to verify and validate the novel developed algorithm, results of its implementation on a gas turbine case study are discussed. The case study is a maintenance optimization problem of Siemens SGT600 gas turbine, comprised of seventeen components and their maintenance activities, two life wear patterns and four production loss scenarios. Results of the optimized solution are compared with gas turbine conventional maintenance plan which is proved to have considerable improvements. It is shown that an optimized maintenance plan would reduce outage time and also increase the availability, which is mainly due to grouping maintenance activities. Besides, reduction in total cost including maintenance costs and production loss cost are of economic consequences of using proposed algorithm. Total cost is reduced more than 80% while availability is improved roughly 2%.

Suggested Citation

  • Fatemeh Moinian & Hamed Sabouhi & Jafar Hushmand & Ahmad Hallaj & Hiwa Khaledi & Mojtaba Mohammadpour, 2017. "Gas turbine preventive maintenance optimization using genetic algorithm," International Journal of System Assurance Engineering and Management, Springer;The Society for Reliability, Engineering Quality and Operations Management (SREQOM),India, and Division of Operation and Maintenance, Lulea University of Technology, Sweden, vol. 8(3), pages 594-601, September.
    • Handle: RePEc:spr:ijsaem:v:8:y:2017:i:3:d:10.1007_s13198-017-0627-3
    DOI: 10.1007/s13198-017-0627-3
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    References listed on IDEAS

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    1. Khairy A. H. Kobbacy, 2008. "Artificial Intelligence in Maintenance," Springer Series in Reliability Engineering, in: Complex System Maintenance Handbook, chapter 9, pages 209-231, Springer.
    2. Boschian, V. & Rezg, N. & Chelbi, A., 2009. "Contribution of simulation to the optimization of maintenance strategies for a randomly failing production system," European Journal of Operational Research, Elsevier, vol. 197(3), pages 1142-1149, September.
    3. Markus Bohlin & Mathias Wärja, 2015. "Maintenance optimization with duration-dependent costs," Annals of Operations Research, Springer, vol. 224(1), pages 1-23, January.
    4. Sandve, Kjell & Aven, Terje, 1999. "Cost optimal replacement of monotone, repairable systems," European Journal of Operational Research, Elsevier, vol. 116(2), pages 235-248, July.
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