Compressor sensor and diagnostics system and method

One or more tangible, non-transitory, computer readable media storing instructions thereon that, when executed by processing circuitry, are configured to cause the processing circuitry to:

• receive first data indicative of a first known operating condition of a compressor;
• receive second data indicative of a second known operating condition of the compressor;
• and
• determine, based at least in part on the first known operating condition and the second known operating condition, a suction mass flow rate of a refrigerant entering the compressor, an input power of the compressor, a discharge temperature of the refrigerant leaving the compressor, a suction temperature of the refrigerant entering the compressor, a pressure ratio of the refrigerant entering and leaving the compressor, or any combination thereof.

A heating, ventilation, and/or air conditioning (HVAC) system, comprising:

• a vapor compression cycle comprising a compressor;
• a first sensor configured to detect a first discharge or suction condition of a refrigerant;
• a second sensor configured to detect a second discharge or suction condition of the refrigerant;
• and
• processing circuitry configured to:
• receive, from the first sensor and the second sensor, sensor feedback indicative of the first discharge or suction condition and the second discharge or suction condition, respectively;
• and
• determine, based at least in part on the first discharge or suction condition and the second discharge or suction condition, a suction mass flow rate of the refrigerant entering the compressor, an input power of the compressor, a discharge temperature of the refrigerant leaving the compressor, a suction temperature of the refrigerant entering the compressor, or any combination thereof.