HVAC control system and method
AssigneeJohnson Controls Technology Company
InventorsJohn E. Seem, Anderlyne M. Canada
Life of this patent
Estimating the term…
Abstract
An HVAC control system configured to control the environment of a building zone includes a means for determining a number of people occupying the building zone and a means for determining properties of other heat transferring objects located within the building zone. The HVAC control system may also include a controller, the controller being configured to compute a projected heat gain in a building zone based on the determined number of people occupying the building zone and the determined properties of the other heat transferring objects located within the building zone. The controller may use the computed projected heat gain to determine a zone ventilation setpoint for the building zone.
Claims27
An HVAC control system configured to control the environment of a building zone, comprising:
- means for determining a number of people occupying the building zone;
- means for determining properties of other heat transferring objects located within the building zone;
- and
- a controller, the controller being configured to compute a projected heat gain in a building zone based on the determined number of people occupying the building zone and the determined properties of the other heat transferring objects located within the building zone;
- wherein the controller uses the computed projected heat gain to determine a zone ventilation setpoint for the building zone.
A method of providing HVAC control to a zone using an HVAC control system, comprising:
- determining a desired volumetric flow rate, comprising:
- computing a projected convective heat gain to the zone from people and other heat transferring objects located within the building zone, and considering at least one air property;
- selecting a volumetric flow rate setpoint;
- sending the selected volumetric flow rate setpoint to a zone ventilation device.
A controller configured to control the environment of a building zone, comprising:
- a data processor;
- a zone ventilation device interface communicably coupled to the data processor, the zone ventilation device interface being configured to route a control signal to a zone ventilation device;
- and
- a sensor interface communicably coupled to the data processor, the sensor interface being configured to accept a signal from at least one sensor located within the building zone;
- wherein the data processor is configured to compute a projected convective heat gain to the building zone from people and other heat transferring objects located within the building zone based on a signal received from the sensor interface;
- and wherein the data processor is configured to send a control signal to the zone ventilation devices via the zone ventilation device interface based at least partially on the computed projected convective heat gain.
Dependencies are inferred from the claim text.