AVAILABILITY ASSESSMENT FOR AGING REFRIGERATION SYSTEM BY USING LZ-TRANSFORM

  • Ilia Frenkel Center for Reliability and Risk Management Industrial Engineering and Management Department, SCE - Shamoon College of Engineering, Beer-Sheva, Israel
  • Anatoly Lisnianski The Israel Electric Corporation Ltd. P. O. Box 10, Bait Amir, Haifa 3100, Israel
  • Lev Khvatskin Center for Reliability and Risk Management Industrial Engineering and Management Department, SCE - Shamoon College of Engineering, Beer-Sheva, Israel
Keywords: availability, multi-state system, L -transform method, universal generating function

Abstract

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

 

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Published
2012-05-31
Section
Articles