The Issues of Reliability of Microclimate Creation Systems

Abstract

AbstractThe issues of the reliability of ventilation and air-conditioning systems are considered in the paper. Two versions for the operation of microclimate creation systems in the transformer substation room are considered in terms of reliability. The reliability of ventilation systems is a complex property, which in turn is characterized by such important indicators as the probability of failure-free operation, durability, maintainability, and persistence. To calculate the reliability of systems in operation, the main reliability parameters are identified: the probability of failure-free operation, the failure rate, the probability of failure. In the first version, the microclimate parameters are provided with the ventilation and air-conditioning system. In the second version, the microclimate parameters are provided with ventilation systems. The result of calculations is that ventilation systems without air-cooling are more reliable to exploitation and provide the necessary microclimate parameters. The designed ventilation system has a lower probability of failure in comparison with other possible combined systems, which provide removing heat from the substation equipment. The reliability of the systems functioning on the indicator of the “Probability of failure-free operation” is higher for the systems of version No. 2. The reliability of the systems functioning on the indicator of the “Probability of failure” is lower for the systems of version No. 2.KeywordsVentilationAir-conditioningMicroclimateTransformer substationReliabilityProbability of failure-free operationFailure rate