Patent ID: 11867391
Assignee: ENERO INVENTIONS INC.
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F | IPC F

Claim 8:
9. A system for modulating a solid-fuel-based combustion process, comprising:
a processing unit; and
a non-transitory computer-readable memory having stored thereon program instructions executable by the processing unit for:
determining, using a virtual sensor, a current instantaneous heat release of a solid-fuel-based heat generator based on at least two sensor values, the at least two sensor values comprising a flow rate of steam produced by the heat generator and a steam drum pressure differential over time in the heat generator;
at a high speed heat release controller in cascade connection with a slow-speed heat release controller comprising one of a steam flow controller and a steam pressure controller, receiving the current instantaneous heat release from the virtual sensor and comparing the current instantaneous heat release to a current firing rate demand received from the slow-speed controller; and
when the current instantaneous heat release does not correspond to the current firing rate demand, causing, at the high-speed controller, an underfire air flow of and a rate of fuel flow to the heat generator, to be adjusted with a closed-loop time constant of less than two minutes to minimize a difference between the current instantaneous heat release and the current firing rate demand.