AVAILABILITY ASSESSMENT FOR AGING REFRIGERATION SYSTEM BY USING LZ-TRANSFORM

This paper presents a case study of z L -transform method application to calculation ofavailability for complex aging refrigeration system. The system and its components can havedifferent performance levels ranging from perfect functioning to complete failure and, so it istreated as a multi-state system. Straightforward Markov method applied to solve the problem willrequire building of the system model with numerous numbers of states and solving acorresponding system of differential equations. z L -transform method, which is used forcomputation of availability for such refrigeration system, drastically simplified the solution.