Heating – Processes of heating or heater operation – Treating an article – container – batch or body as a unit
Patent
1981-06-02
1983-01-11
Camby, John J.
Heating
Processes of heating or heater operation
Treating an article, container, batch or body as a unit
266 80, 432 37, F27D 300, F27B 940, C21B 724
Patent
active
043680348
ABSTRACT:
For each of three control zones in a furnace, a computer calculates, at time intervals .DELTA.t, the heat input to slabs from the actual flow rates of the fuel and air and other stored data through the use of the equation of the thermal equilibrium and then determining the heat input to each slab by apportioning the calculated heat input among the slabs according to its heat content before the .DELTA.t. Subsequently, the computer estimates the fuel flow rate after the time interval .DELTA.t from a difference between the calculated heat input and an objective heat input and then determining the fuel flow rate through the use of the equation of the thermal equilibrium. For each control zone, a fuel regulator controls the fuel flow rate in response to the estimated flow rate while an air regulator controls an air flow rate in response to an optimum air ratio as determined by the estimated flow rate.
REFERENCES:
patent: 3604695 (1971-09-01), Steeper
patent: 4255133 (1981-03-01), Tauifuji et al.
Camby John J.
Mitsubishi Denki & Kabushiki Kaisha
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