General Electric Company
SYSTEM AND METHOD FOR HEAT EXCHANGER CONTROL BASED ON REAL-TIME CORROSION MONITORING

Abstract:

A system and method of controlling corrosion of a heat exchanger, having a hot gas inlet and outlet and a cold side inlet and outlet. The method includes determining a temperature of the heat exchanger at a first selected location, controlling a temperature of a corrosion sensing device to a first selected temperature based on the temperature of the surface of the heat exchanger and determining a corrosion rate associated with the heat exchanger surface at the first selected location for the first selected temperature. The method also includes comparing the corrosion rate to an expected corrosion rate, determining a cold side fluid inlet temperature target for the heat exchanger based at least in part on the comparing, the determined corrosion; and controlling a cold side fluid inlet temperature based at least in part on the determined inlet temperature target, determined corrosion rate, and expected corrosion rate.