Patent ID: 11906245
Assignee: CMPC TISSUE S.A.
Field: Chemical engineering (Chemistry)
Classification: CPC D  F  B | IPC B  F

Claim 6:
7. A method for controlling an electric heater mixing plenum used in an air recirculation system, comprising:
controlling a first inlet damper and a first outlet damper of a first chamber of the electric heater mixing plenum to open positions to allow air flow through the first chamber, wherein the first chamber includes a resistance-type electric air heater;
controlling a second inlet damper of a second chamber of the electric heater mixing plenum to an open position to allow air flow through the second chamber, wherein the second chamber is adjacently disposed to the first chamber within the electric heater mixing plenum; and
closing the first inlet damper and the first outlet damper of the first chamber to prevent air flow through the first chamber,
wherein when the first inlet damper and the first outlet damper are in closed positions and the second inlet damper is in the open position, air flow through the electric heater mixing plenum flows from an upstream end of the electric heater mixing plenum through the second inlet damper into the second chamber, through the second chamber into a mixing chamber, and through the mixing chamber to a downstream end of the electric heater mixing plenum, and
when the first inlet damper and the first outlet damper are in open positions and the second inlet damper is in a closed position, air flow through the electric heater mixing plenum flows from the upstream end of the electric heater mixing plenum through the first inlet damper into the first chamber, through the first outlet damper into the mixing chamber, and through the mixing chamber to the downstream end of the electric heater mixing plenum.