- Displacement: cylinder volume or rotor swept volume, which decides how much refrigerant is pumped per revolution.
- Refrigerant type: R600a, R134a, R32, R410A have different thermodynamic properties, leading to different power consumption at the same cooling capacity.
- Compression ratio: evaporation and condensing temperature. Higher ambient temperature increases compression load and power draw.
- COP / energy efficiency level: high-efficiency compressors reduce friction and internal loss, so they deliver the same cooling capacity with lower input power.
- Motor design and rotating speed: fixed-speed compressors run at constant RPM; inverter compressors adjust real-time power by changing speed.
- Electrical specification: voltage and frequency (115V/60Hz, 230V/50Hz) affect motor winding and power matching.
Note: Cooling capacity (heat removal capacity) is not equal to compressor input power (electricity consumption).
