METHOD AND SYSTEM FOR IMPROVING ENERGY EFFICIENCY IN AN HVAC SYSTEM
First Claim
1. A method performed by a zone controller for a zone of a building for improving energy efficiency in a heating, ventilation, and air conditioning (HVAC) system, comprising:
- operating in a ventilation mode;
monitoring a temperature of the zone;
monitoring outside air conditions for the building;
determining whether to switch from the ventilation mode to an economizing mode based on a first set point for the temperature of the zone and based on the outside air conditions, wherein the first set point is determined based on a second set point for the temperature different from the first set point; and
determining whether to activate the HVAC system based on the second set point.
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Abstract
A method performed by a zone controller for a zone of a building for improving energy efficiency in a heating, ventilation, and air conditioning (HVAC) system is provided. The method includes operating in a ventilation mode. A temperature of the zone and outside air conditions for the building are monitored. A determination is made regarding whether to switch from the ventilation mode to an economizing mode based on a first set point for the temperature of the zone and based on the outside air conditions. The first set point is determined based on a second set point for the temperature that is different from the first set point. A determination is made regarding whether to activate the HVAC system based on the second set point.
40 Citations
20 Claims
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1. A method performed by a zone controller for a zone of a building for improving energy efficiency in a heating, ventilation, and air conditioning (HVAC) system, comprising:
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operating in a ventilation mode; monitoring a temperature of the zone; monitoring outside air conditions for the building; determining whether to switch from the ventilation mode to an economizing mode based on a first set point for the temperature of the zone and based on the outside air conditions, wherein the first set point is determined based on a second set point for the temperature different from the first set point; and determining whether to activate the HVAC system based on the second set point. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A zone controller for a zone of a building, comprising:
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a memory configured to store a subsystem application; and a processor coupled to the memory, wherein the processor is configured, based on the subsystem application, (i) to operate in one of a ventilation mode and an economizing mode, (ii) to monitor a temperature of the zone, (iii) to monitor outside air conditions for the building, (iv) to switch from the ventilation mode to the economizing mode based on a first set point for the temperature of the zone and based on the outside air conditions, wherein the first set point is determined based on a second set point for the temperature different from the first set point, and (v) to activate a heating, ventilation, and air conditioning (HVAC) unit based on the second set point. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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15. A non-transitory computer-readable medium encoded with executable instructions that, when executed, cause one or more data processing systems in a zone controller for a zone of a building to:
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operate in one of a ventilation mode and an economizing mode; monitor a temperature of the zone; monitor outside air conditions for the building; determine whether to switch from the ventilation mode to the economizing mode based on a first set point for the temperature of the zone and based on the outside air conditions, wherein the first set point is determined based on a second set point for the temperature different from the first set point; and activate a heating, ventilation, and air conditioning (HVAC) system based on the second set point. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification