Abstract
The purpose of this investigation is to obtain reliability and maintainability data of air-conditioning equipment. Field data concerning the failure of air-conditioning equipment recorded at a building constructed 17 years ago are used. As a result of the field data analysis, failure time distribution of turbo-refrigerator, cooling tower, pump and AHU is generated and expressed in Weibull distribution. The parameter of each distribution shows they can be expressed approximately by exponential distribution. Maintenance time distribution is also generated for each equipment as logarithmic normal distribution. Additionally an analysis concerning the relation between availability calculations and failure data with short maintenance time is presented.
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