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Availability optimization of power generating units used in sewage treatment plants using metaheuristic techniques

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Listed:
  • Monika Saini
  • Ashish Kumar
  • Dinesh Kumar Saini
  • Punit Gupta

Abstract

Metaheuristic techniques have been utilized extensively to predict industrial systems’ optimum availability. This prediction phenomenon is known as the NP-hard problem. Though, most of the existing methods fail to attain the optimal solution due to several limitations like slow rate of convergence, weak computational speed, stuck in local optima, etc. Consequently, in the present study, an effort has been made to develop a novel mathematical model for power generating units assembled in sewage treatment plants. Markov birth-death process is adopted for model development and generation of Chapman-Kolmogorov differential-difference equations. The global solution is discovered using metaheuristic techniques, namely genetic algorithm and particle swarm optimization. All time-dependent random variables associated with failure rates are considered exponentially distributed, while repair rates follow the arbitrary distribution. The repair and switch devices are perfect and random variables are independent. The numerical results of system availability have been derived for different values of crossover, mutation, several generations, damping ratio, and population size to attain optimum value. The results were also shared with plant personnel. Statistical investigation of availability results justifies that particle swarm optimization outdoes genetic algorithm in predicting the availability of power-generating systems. In present study a Markov model is proposed and optimized for performance evaluation of sewage treatment plant. The developed model is one that can be useful for sewage treatment plant designers in establishing new plants and purposing maintenance policies. The same procedure of performance optimization can be adopted in other process industries too.

Suggested Citation

  • Monika Saini & Ashish Kumar & Dinesh Kumar Saini & Punit Gupta, 2023. "Availability optimization of power generating units used in sewage treatment plants using metaheuristic techniques," PLOS ONE, Public Library of Science, vol. 18(5), pages 1-22, May.
    • Handle: RePEc:plo:pone00:0284848
    DOI: 10.1371/journal.pone.0284848
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    References listed on IDEAS

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