Applications of fault detection and diagnostic techniques for refrigeration and air conditioning: A review of basic principles

Abstract

During the 1990s a number of different prototype Refrigeration and Air Conditioning (RAC) Fault Detection and Diagnostic (FDD) systems have been developed and subsequently presented in various research publications. This interest in RAC FDD systems is generally a result of the potential benefits, such as reducing equipment downtime and avoiding energy wastage, these systems can bring to new and existing RAC installations. With the exception of a few reports produced by the International Energy Agency (IEA) Annex 25, no other publications or texts exist that bring together the various FDD concepts directly associated with RAC applications. However, the reports produced by the IEA are far from comprehensive enough to be of use to typical industry personnel. Therefore, the aim of this review is to present RAC personnel with a clearer understanding of the fundamental principles associated with the application of RAC FDD. The paper will initially highlight various relevant areas before presenting examples of typical FDD systems applicable to RAC systems.