Optimizing Redundancy and Inventory of Spare Equipment with Regard to Reliability in Multi-State Systems 

Document Type : Original Article

Authors

1 Ph.D. Candidate, Department of Industrial Engineering, University of Kurdistan   

2 Associate Professor, Department of Industrial Engineering, University of Kurdistan,  

Abstract
This research provides a solution for modeling the availability of Feed Water System (FWS) of Heat Recovery Steam Generator (HRSG) in MAPNA Boiler and Equipment Engineering and Manufacturing Company with the aim of determining the system equipment suppliers in such a way that the total cost in the construction and operation of the system is minimized. The Feed Water System is one of the most sensitive parts of boilers; because its failure causes the boiler to stop and incurs irreparable costs to the system. The system may be in three capacities: full capacity, half load, and stop, each of which may impose costs on the system. For modeling, possible states are first written for the system and then the system configuration is plotted using the reliability block diagram and P&ID. Then the results of modeling with Markov chain method are placed in a mathematical optimization model. After solving the model, the optimal strategy in selecting equipment suppliers will be determined. 

Keywords


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