MODELS FOR SIMULATION AND DIAGNOSIS OF ENERGY PLANT COMPONENTS

This paper describes a methodology to set up models for simulation and diagnosis of energy plant components. The adopted approach consists in a simultaneous solution of modules representing plant components taking their actual behaviour into account. Reality Functions are introduced to adapt the models to the reality of the machines and apparatuses. They enable the model to reproduce the N&C behaviour of a specific real component taking its peculiar individual features into consideration. Actuality Functions are introduced to represent actual component statuses. They adapt the model response to that of the real actual component by modifying work (or heat) transfer capability, effective flow functions and losses. Actuality Function identification is performed by using DCS data. After their determination the actual component performance map is re-established inside the model. The developed methodology has been applied to two different types of CHP plants. In both cases results show the capability to reproduce with satisfactory accuracy the N&C as well as actual deteriorated behaviour of the plant