The product of corrosion in the feed water system transported into the boiler and gets deposited on the internal surface of waterwall tubes. Proper treatment of boiler feedwater effectively protects against corrosion of feedwater heaters, economizers, and deaerators. It leads to overheating and on-load corrosion and ultimately tube failure.. Heat is transferred through a thin layer of superheat...

The boiler drum process is a nonlinear, complex and multivariable process which includes significant time delay. Therefore, the control on the water level in the drum is not easy and ideal. The first objective of this paper is to model the drum water level referring to 210 MW power unit for Nassiriyah thermal power plant. The second objective is to study the water level controller operation wit...

The paper presents an analysis of water-level control in a thermal power plant (TPP) steam separator. This structure is vital for the entire plant’s stable, reliable, and efficient operation. process belongs to processes with integrator because it concerns level-control issue, variable feedwater flow. Said industrial are challenging apply standard methods tuning PID controller, so new procedure...

An important requirement for the practical implementation of empirical diagnostic systems is the capability of classifying transients in all plant operational conditions. The present paper proposes an approach based on an ensemble of classifiers for incrementally learning transients under different operational conditions. New classifiers are added to the ensemble where transients occurring in n...

Renewable energy can be captured from the mixing of salt and fresh water in reverse electrodialysis. This paper investigates the energy efficiency of this process for feed waters that pass a reverse electrodialysis cell once and waters that pass multiple cells or electrode segments. So far, the maximum theoretical energy efficiency was considered to be 50% when the feed waters pass a single cel...

1 Summary. Interval-censored recurrent event data arise when event occurence is only determined at periodic assessment times. Nonparametric estimates of rate and mean functions are readily obtained in this settings, but lack the smoothness usually anticipated for the underlying event process. We describe local likelihood methods which generate smooth estimates of rate and mean functions, and as...