Increasing the level of information use in technical diagnostic systems of steam turbine condensers

Abstract

The article analyzes and presents an advanced system of technical diagnostics of elements of
low-potential complexes (condensers, circulation and condensate pumps, ejectors) at thermal and
nuclear power plants. The paper defines certain prospects of increasing the efficiency of the
functioning of systems of technical diagnostics of elements of low-potential complexes by means of simultaneously using expert evaluation and efficient algorithm. This allows taking into account all
possible states of working equipment, and solving badly formalized problems or problems which
have no algorithmic solution.
Expert evaluation is carried out based on monitoring results, in cases where the source and
reasons for the failure are not obvious, which allows for effective use of the experience of
operational and operational staff of power plants. The main functions of the system of technical
diagnostics of low-potential complexes are singled out. The parameters that significantly affect the
heat exchange in the condenser and largely determine the energy efficiency of steam turbines of
thermal and nuclear power plants, especially at partial loads of the power unit, are determined. Such
parameters include the pressure of the steam exhausted in the turbine and the temperature pressure
in the condenser at the given values of the flow rate of steam and cooling water in the turbine
condense, and the temperature of the cooling water at the inlet to the condenser. The ratio for
determining these parameters is given. The factors that must be taken into account when designing
systems of technical diagnostics are defined. The main stages of the system of technical diagnostics
of elements of low-potential complexes, the full algorithm of operations of the technical diagnostics
system and the algorithm for determining the degree of pollution of condenser tubes, which is most
characteristic in the operating conditions of power units of thermal and nuclear power plants and
significantly affects the processes of heat exchange and energy efficiency of steam turbines, are
presented. Technical diagnostics systems can be implemented either as specialized subsystems in
the ACS of power units, or as separate autonomous systems.