Energy Reducing Retrofit Apparatus For A Constant Volume HVAC System
AssigneePro Star Energy Solutions, L.P.
InventorsDanny MILLER, Justin SIPE
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Abstract
Systems and methods are provided and include a variable frequency drive configured to drive a fan motor of an HVAC system to ventilate an indoor space, the HVAC system having a cooling assembly that includes at least one of an economizer and a compressor. A controller is configured to communicate with the variable frequency drive, receive at least one signal from an occupancy sensing device, determine whether the indoor space is less than fully occupied based on the at least one signal, and control the variable frequency drive to reduce a speed of the fan motor in response to determining that the indoor space is less than fully occupied.
Claims20
A system comprising:
- a variable frequency drive configured to drive a fan motor of an HVAC system to ventilate an indoor space, the HVAC system having a cooling assembly that includes at least one of an economizer and a compressor;
- and
- a controller configured to (i) communicate with the variable frequency drive, (ii) receive at least one signal from an occupancy sensing device, (iii) determine whether the indoor space is less than fully occupied based on the at least one signal, and (iv) control the variable frequency drive to reduce a speed of the fan motor in response to determining that the indoor space is less than fully occupied.
A method comprising:
- receiving, with a controller of an HVAC system for an indoor space, at least one signal from an occupancy sensing device, the HVAC system having a cooling assembly that includes at least one of an economizer or a compressor;
- determining, with the controller, whether indoor space is less than fully occupied based on the at least one signal;
- and
- controlling, with the controller, a variable frequency drive that drives a fan motor of the HVAC system to ventilate the indoor space by reducing a speed of the fan motor in response to determining that the indoor space is less than fully occupied.
Dependencies are inferred from the claim text.