RAM analysis and availability optimization of thermal power plant water circulation system using PSO
| Autor: | Mohammad Hossein Ahmadi, Mamdouh El Haj Assad, Mohsen Sharifpur, Anand K. Bewoor, Hanumant P. Jagtap, Ravinder Kumar |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Availability analysis
Fault tree analysis Markov approach Reliability block diagram Computer science Particle swarm optimization 020209 energy Thermal power station Failure rate 02 engineering and technology TK1-9971 Reliability engineering General Energy 020401 chemical engineering Criticality 0202 electrical engineering electronic engineering information engineering Electrical engineering. Electronics. Nuclear engineering 0204 chemical engineering Deaerator Boiler feedwater pump |
| Zdroj: | Energy Reports, Vol 7, Iss, Pp 1133-1153 (2021) |
| ISSN: | 2352-4847 |
| Popis: | This paper presents reliability, availability, and maintainability (RAM) analysis framework for evaluating the performance of a circulation system of water (WCS) used in a coal-fired power plant (CFPP). The performance of WCS is evaluated using a reliability block diagram (RBD), fault tree analysis (FTA), and Markov birth–death probabilistic approach. In this work, the system under study consists of five subsystems connected in series and parallel configuration namely condensate extraction pump (CEP), low-pressure feed water heater (LPH), deaerator (DR), boiler feed pump (BFP), high-pressure feed water heater (HPH). The reliability block diagram (RBD) and fault tree approach (FTA) have been employed for the performance evaluation of WCS. The Markov probabilistic approach based simulation model is developed. The transition diagram of the proposed model represented several states with full working capacity, reduced capacity, and failed state. The ranking of critical equipment is decided on the basis of criticality level of equipment. The study results revealed that the boiler feed pump affects the system availability at most, while the failure of deaerator affects it least. The availability of the system is optimized using the particle swarm optimization method. The optimized availability parameter (TBF, TTR) based modified maintenance strategy is recommended to enhance the availability of the plant system. The optimized failure rate and repair rate parameters of the subsystem are used to suggest a suitable maintenance strategy for the water circulation system of the thermal power plant. The proposed RAM framework helps the decision-makers to plan the maintenance activity as per the criticality level of subsystems and allocate the resources accordingly. |
| Databáze: | OpenAIRE |
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