Abstract
The on-line performance monitoring of a heat exchanging process using water and steam, which is one of the key components of distributed energy supply system, has been develop on the basis of a theoretical model. By using an input-output model of the process, this performance monitoring first estimates output process variables and heat exchange performance of the process in response to the variation in measured input process variables. These estimated values are then compared with the measured ones for the on-line performance monitoring. The effective of this method for the normal operation under steady-state and transient conditions and for a deterioration of the heat exchange performance due to air accumulation in the shell has been clarified. Thus, this paper investigates a diagnosability for deteriorations of the heat exchange performance occurred at the inside and outside the tube of the heat exchanger.
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