Patent Document ID: 20040244729
Application ID: 10841592
Patent Flag: 0

Claim One:
1. A system for controlling removal of combustion deposits in a boiler, one or more heat zones being defined in the boiler, each heat zone having a cleanliness level and being associated with an adjustable desired cleanliness level during the operation of the boiler, the performance of the boiler being characterized by boiler performance parameters, comprising: a controller input for receiving a performance goal for the boiler corresponding to at least one of the boiler performance parameters and for receiving data values corresponding to boiler state variables and to the boiler performance parameters, said boiler state variables including current cleanliness levels; a system model that relates the cleanliness levels in the boiler to the boiler performance parameters; an indirect controller that determines a set of desired cleanliness levels to satisfy the performance goal for the boiler, said indirect controller using the system model, the received data values and the received performance goal to determine the set of desired cleanliness levels; and a controller output that outputs the set of desired cleanliness levels.