Abstract
The purpose of this study is to develop the monitoring and diagnosis methods for distributed energy system using fieldbus technology, which makes it possible to share much information of field devices. The authors constructed an experimental apparatus of a hot water supply process, which is one of the key components of distributed energy systems. The targets of abnormal conditions are not only air accumulation, which was also the target of previous works, but also drain accumulation in the shell. An algorithm of the process diagnosis based on monitoring process values and device operating conditions using the statuses in FOUNDATION fieldbus is developed and its effectiveness is confirmed experimentally.
