Effect of various pump hot-cold redundancy on availability of thermal power plant subsystems
by Ravinder Kumar; Avdhesh Kr. Sharma; P.C. Tewari
International Journal of Intelligent Enterprise (IJIE), Vol. 2, No. 4, 2014

Abstract: The present paper deals with the effect of pump hot-cold redundancy on availability of various subsystems in a thermal power plant. For analysis two subsystems of thermal power plant have been considered in the present study, i.e., condensate subsystem and water circulation comprising of condensate extraction pumps and boiler feed pumps as hot-cold redundant units respectively. Each subsystem was further sub-divided into a number of units and sub-units or components. Operational availability of both subsystems has been evaluated using Markov birth-death process with various pumps redundancy levels. For availability prediction, the state transition diagrams of two subsystems (i.e., water circulation and condensate subsystem) with various pumps redundancy levels were prepared. The results predict that from an economic point of view, availability of water circulation and condensate subsystem found to be 0.9036 and 0.99 by using two numbers of boiler feed pump and condensate extraction pump in each subsystem respectively based on failure/repair rate data retrieved from different sources. Hence, the results are beneficial for the plant management from the economic point of view.

Online publication date: Thu, 30-Apr-2015

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