Open AccessComputing reliability for closed-cycle cooling system in thermo-electric power plants by modelling to circular consecutive-2-out-of-n:F system
Author(s) -
Mehmet Gürcan,
Gökhan Gökdere
Publication year - 2018
Publication title -
thermal science/thermal science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.339
H-Index - 43
eISSN - 2334-7163
pISSN - 0354-9836
DOI - 10.2298/tsci170804284g
Subject(s) - reliability (semiconductor) , water cooling , cooling tower , turbine , steam turbine , reliability engineering , electric power system , computer science , power (physics) , control theory (sociology) , mechanics , environmental science , nuclear engineering , mechanical engineering , engineering , thermodynamics , physics , control (management) , artificial intelligence
The main motivation of this paper is to compute a reliability for a closed recurring water supply system with n water pumps in a thermo-electric plant by modelling to a repairable circular consecutive-2-out-of-n:F system. In a thermo-electric plant system, let us have n water pumps for pumping the water and steam expelled from a turbine to a cooling tower. These pumps are installed around the system and each pump must be powerful enough to pump water and steam to at least the next two consecutive pumps. If any two or more consecutive pumps in the system are failed, the system is failed. For this system, it is important to determine the reliability. First, we developed mathematical formulations for the state transition probabilities in the system by using the definition of generalized transition probability and the concept of critical component under the assumption that pumps have unequal failure rates. Then, using these formulations we derived the state transition probability matrix of the system. Finally, a special model is given to calculate the system reliability.