SETPOINT RECOVERY WITH UTILITY TIME OF DAY PRICING
First Claim
1. A method for operating an HVAC system, the HVAC system having one or more HVAC units for conditioning inside air of a building, and an HVAC controller for controlling the one or more HVAC units, the HVAC controller having a programmable schedule, wherein the programmable schedule includes an energy efficient setpoint that is effective for a first period of time followed by a less energy efficient setpoint effective for a second period of time, the method comprising:
- storing in a memory of the HVAC controller a utility pricing schedule that includes one or more enhanced pricing time periods;
activating one or more of the HVAC units at an actual recovery start time that is before the beginning of the second period of time such that a temperature of the inside air begins moving from a current inside air temperature toward the less energy efficient setpoint before the beginning of the second period of time; and
wherein the actual recovery start time is dependent upon one or more enhanced pricing time periods that are scheduled between a nominal recovery start time and the beginning of the second time period, wherein the nominal recovery start time is defined as the time at which the one or more HVAC units would be activated to move the temperature of the inside air to achieve the less energy efficient setpoint at about the beginning of the second period of time.
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Accused Products
Abstract
An HVAC controller with setpoint recovery with utility time of day pricing. In one illustrative embodiment, the HVAC controller may include a nominal programmable schedule and a utility pricing schedule. The utility pricing schedule may correspond to scheduled price changes of a utility, including one or more enhanced pricing time periods each having corresponding one or more enhanced pricing time period setpoints. The HVAC controller may establish or modify an enhanced pricing setpoint recovery schedule based at least in part upon the nominal schedule and the utility pricing schedule, and may control one or more HVAC units in accordance with the setpoint recovery schedule. In some instances, the HVAC controller may identify recovery opportunities based at least in part upon the nominal schedule and the utility pricing schedule.
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Citations
20 Claims
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1. A method for operating an HVAC system, the HVAC system having one or more HVAC units for conditioning inside air of a building, and an HVAC controller for controlling the one or more HVAC units, the HVAC controller having a programmable schedule, wherein the programmable schedule includes an energy efficient setpoint that is effective for a first period of time followed by a less energy efficient setpoint effective for a second period of time, the method comprising:
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storing in a memory of the HVAC controller a utility pricing schedule that includes one or more enhanced pricing time periods; activating one or more of the HVAC units at an actual recovery start time that is before the beginning of the second period of time such that a temperature of the inside air begins moving from a current inside air temperature toward the less energy efficient setpoint before the beginning of the second period of time; and wherein the actual recovery start time is dependent upon one or more enhanced pricing time periods that are scheduled between a nominal recovery start time and the beginning of the second time period, wherein the nominal recovery start time is defined as the time at which the one or more HVAC units would be activated to move the temperature of the inside air to achieve the less energy efficient setpoint at about the beginning of the second period of time. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for operating an HVAC system, the HVAC system having one or more utility-powered HVAC units for conditioning inside air of a building and a local HVAC controller for controlling the one or more HVAC units, wherein the HVAC controller includes a programmable schedule that includes a nominal target setpoint and a nominal target time, the method comprising:
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storing in the memory of the local HVAC controller a utility pricing schedule that corresponds to scheduled price changes of a utility, including one or more enhanced pricing time periods each having corresponding one or more enhanced pricing time period setpoints; establishing an enhanced pricing recovery schedule based at least in part upon the nominal target setpoint, the nominal target time and the utility pricing schedule; and controlling the one or more HVAC units with the local HVAC controller in accordance with the enhanced pricing recovery schedule. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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15. An HVAC controller for controlling an HVAC system having one or more HVAC units for conditioning inside air of a building, the HVAC controller comprising:
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a memory for storing a nominal schedule, the nominal schedule having a number of days and one or more time periods for each of at least some of the days, the nominal schedule further having at least one setpoint associated with each of the one or more time periods; the memory also storing a utility pricing schedule that corresponds to scheduled price changes of a utility, including one or more enhanced pricing time periods each having corresponding one or more enhanced pricing time period setpoints; a controller coupled to the memory for establishing or modifying an enhanced pricing setpoint recovery schedule based at least in part upon the nominal schedule and the utility pricing schedule; and the controller configured to control the one or more HVAC units in accordance with the setpoint recovery schedule. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification