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 temperature reaching the second set point when the outside air conditions are not favorable as compared to the temperature of the zone.
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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.
60 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 temperature reaching the second set point when the outside air conditions are not favorable as compared to the temperature of the zone. - 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 temperature reaching the second set point when the outside air conditions are not favorable as compared to the temperature of the zone. - 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 temperature reaching the second set point when the outside air conditions are not favorable as compared to the temperature of the zone. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification