Building chiller/heat pump system carbon emission reduction by shifting temperature setpoint

Abstract

A building chiller/heat pump system includes a chiller/heat pump system for supplying a conditioned fluid to change a temperature of air being delivered into a building. The chiller/heat pump system is provided with a control to achieve a desired setpoint of the air delivered into the building. The control is programmed to receive a prediction of expected remission levels in energy that will be delivered to power the chiller/heat pump system. The control is programmed to change the setpoint such that an energy level required to operate the chiller/heat pump system to achieve the setpoint will drop when the expected emissions level increases, and adjusts the setpoint in an opposed direction when the expected emissions drops. A method is also disclosed.

We claim: 
     
         1 . A building chiller/heat pump system comprising:
 a chiller/heat pump system for supplying a conditioned fluid to change a temperature of air being delivered into a building, said chiller/heat pump system being provided with a control to achieve a desired water temperature setpoint to condition the air delivered into the building; and   the control being programmed to receive a prediction of expected emission levels in energy that will be delivered to power the chiller/heat pump system, and the control being programmed to change the setpoint such that an energy level required to operate the chiller/heat pump system to achieve the setpoint will drop when the expected emissions level increases, and adjusts the setpoint in an opposed direction when the expected emissions drops.   
     
     
         2 . The system as set forth in  claim 1 , wherein when the available energy is relatively dirty, and the chiller/heat pump system is operating in a cooling mode, the setpoint is increased for a period of time, and if the chiller/heat pump is operating in a heating mode, the setpoint is decreased for a period of time. 
     
     
         3 . The system as set forth in  claim 2 , wherein when the setpoint is changed in the opposed direction, it is changed to a magnitude that exceeds the actual desired setpoint at that time. 
     
     
         4 . The system as set forth in  claim 2 , wherein the prediction is a prediction of quantity of emissions per a unit of energy. 
     
     
         5 . The system as set forth in  claim 3 , wherein the change in the setpoint occurs across a plurality of cycles during an extended period of relatively dirty power supply. 
     
     
         6 . The system as set forth in  claim 2 , wherein the change in the setpoint occurs across a plurality of cycles during an extended period of relatively dirty power supply. 
     
     
         7 . The system as set forth in  claim 1 , wherein when the setpoint is changed in the opposed direction, it is changed to a magnitude that exceeds the actual desired setpoint at that time. 
     
     
         8 . The system as set forth in  claim 1 , wherein the prediction is a prediction of quantity of emissions per a unit of energy. 
     
     
         9 . The system as set forth in  claim 1 , wherein the change in the setpoint occurs across a plurality of cycles during an extended period of relatively dirty power supply. 
     
     
         10 . The system as set forth in  claim 1 , wherein the control is programmed to calculate a quantity of reduced emission based upon the adjustment of the set point. 
     
     
         11 . A method of operating a chiller/heat pump system:
 operating a chiller/heat pump system for supplying a conditioned fluid to change a temperature of air being delivered into the building, said chiller/heat pump system being provided with a control to achieve a desired water temperature setpoint to condition the air delivered into the building; and   the control receiving a prediction of expected emissions levels in energy that will be delivered to power the chiller/heat pump system, and the control changing the setpoint such that an energy level required to operate the chiller/heat pump system to achieve the setpoint will drop when the emissions level increases, and adjusts the setpoint in an opposed direction when the expected emissions level drops.   
     
     
         12 . The method as set forth in  claim 11 , wherein when the available energy is relatively dirty, and the chiller/heat pump system is operating in a cooling mode, the setpoint is increased for a period of time, and if the chiller/heat pump is operating in a heating mode, the setpoint is decreased for a period of time. 
     
     
         13 . The method as set forth in  claim 12 , wherein when the setpoint is changed in the opposed direction, it is changed to a magnitude that exceeds the actual desired setpoint at that time. 
     
     
         14 . The method as set forth in  claim 12 , wherein the prediction is a prediction of quantity of emissions per a unit of energy. 
     
     
         15 . The method as set forth in  claim 14 , wherein the change in the setpoint occurs across a plurality of cycles during an extended period of relatively dirty power supply. 
     
     
         16 . The method as set forth in  claim 12 , wherein the change in the setpoint occurs across a plurality of cycles during an extended period of relatively dirty power supply. 
     
     
         17 . The method as set forth in  claim 11 , wherein when the setpoint is changed in the opposed direction, it is changed to a magnitude that exceeds the actual desired setpoint at that time. 
     
     
         18 . The method as set forth in  claim 11 , wherein the prediction is a prediction of quantity of emissions per a unit of energy. 
     
     
         19 . The method as set forth in  claim 11 , wherein the change in the setpoint occurs across a plurality of cycles during an extended period of relatively dirty power supply. 
     
     
         20 . The method as set forth in  claim 11 , wherein the control is programmed to calculate a quantity of reduced emission based upon the adjustment of the set point.