Fault Diagnosis Methods for District Heating Substations. Research Programme onEnergy Use in Buildings

摘要

The paper presents five different approaches to fault diagnosis. While developingthe methods, various kinds of pragmatic aspects and robustness had to be considered in order to achieve practical solutions. The presented methods are: classification of faults using performance indexing, static and physical modeling of process equipment, energy balance of the process, interactive fault tree reasoning and statistical tests. The methods are applied to a control valve, a heat exchanger, a mud separating device, and the whole process. The developed methods are verified in practice using simulation, emulation, or field tests.