Technical Details - Optimised Refrigerant Supply (ORS®)
Air condition manufactures make use of thermodynamic (temperature) thermostats alone when controlling compressors. Even with modern inverter drives this approach delivers limited opportunities for energy savings. ORS® employs data from two temperature sensors for determining when work is needed from the air-conditioners compressor. .
- The first sensor replicates the function of the thermodynamic (temperature) thermostat and it’s employed by ORS® to deliver the required fixed-minimum room temperature as a priority.
- The second sensor measures the temperature of the cold supply air from the air conditioner and this is used as a proxy to determine when the compressor has completed its hydraulic work of fully compressing the refrigerant gas.
Of course, once the refrigerant gas is fully compressed, continuing to run the compressor is a waste of energy and yet this is what use of thermodynamic measurement alone persist in doing.
With the additional information derived from its second sensor, ORS® is able to stop (non-inverter) or slow (inverter) the compressor whilst the air conditioner uses the reservoir of cooling capacity that has been created to cool the room. Once ORS® determines that further cooling capacity is needed, the compressor is started (non-inverter) or speeded up (inverter) again until its hydraulic work has been completed once more.