System and method for determining efficiency of chillers

A system, comprising:

• a building automation system configured to control a chiller;
• and
• a control system configured to:
• operate the chiller over a range of operating capacities of the chiller;
• calculate a first efficiency value of the chiller at a first operating capacity of the chiller;
• calculate a plurality of second efficiency values of the chiller at a plurality of second operating capacities of the chiller;
• separate samples comprising the first efficiency value and the plurality of second efficiency values into a plurality of bins, wherein each bin of the plurality of bins represents a portion of the range of operating capacitates of the chiller;
• generate an efficiency curve for the chiller based on the samples in the plurality of bins;
• and
• communicate the efficiency curve to the building automation system.

A chiller, comprising:

• a control system comprising a processor and a memory, wherein the control system is configured to:
• operate the chiller over a range of operating capacities of the chiller;
• calculate a first efficiency value of the chiller at a first operating capacity of the chiller;
• calculate a plurality of second efficiency values of the chiller at a plurality of second operating capacities of the chiller;
• separate samples comprising the first efficiency value and the plurality of second efficiency values into a plurality of bins, wherein each bin of the plurality of bins represents a portion of the range of operating capacities of the chiller;
• and
• generate an efficiency curve for the chiller based on the samples in the plurality of bins.