COOKING EXHAUST HOOD VENTILATION SYSTEM AND RELATED METHODS

摘要

Controlling an exhaust hood system having multiple hood sections each with an exhaust output having an associated damper, each exhaust output feeding to a common downstream fan, where damper position and fan speed control an exhaust flow rate through each hood section, involves monitoring at least one condition of each hood section and, based upon the monitoring, establishing a target flow rate for each hood section; based upon a sum of the target flow rates, establishing a fan speed; and monitoring an actual flow rate through each hood section and responsively controlling damper position to achieve the target flow rate for the hood section. Adjusting fan speed and damper position until damper position for at least one hood section achieves a predetermined open position, while at the same time each hood section satisfies its associated target flow rate, can reduce energy costs associated with system operation.

主权项

1. A method of controlling a commercial kitchen exhaust hood system of a type having multiple hood sections each with an exhaust output having an associated damper, each exhaust output feeding to a common downstream fan, wherein the operation of the fan pulls exhaust from each hood section, where damper position and fan speed control an exhaust flow rate through each hood section, the method comprising:
monitoring at least one condition of each hood section and, based upon the monitoring, establishing a target flow rate for each hood section; based upon a sum of the target flow rates, establishing a fan speed; monitoring an actual flow rate through each hood section and responsively controlling damper position of the hood section to achieve the target flow rate for the hood section.