UK: Aermec has launched Aersave, a smart controller that can convert any 3-phase fixed speed compressor to a variable speed compressor.
Aermec says the Aersave can be used on any manufacturers’ chillers, operates with any refrigerant and is compatible with all brands of BMS systems.
The technology was recently trialled by one of the largest fresh food manufacturers in Ireland, where the chiller delivered a reduction in electrical consumption of 41%.
Aersave comprises two sensors instead of pressure transducers. One connects onto the suction line of the compressor, the other to the discharge line. The compressor control gathers the temperature from the two sensors’ points, together with gathering data via Modbus from the device via the compressor. An algorithm then calculates what speed and compressor capacity is required for the complete system to achieve its demand capacity.
While working on lower frequency for prolonged periods of time an oil return sequence brings the oil back to the compressor to protect it.
Aersave also has multiple dip switch settings that can be switched dependent on the compressor type whether it is a reciprocating or scroll. It also controls the fan motor whether it is a condenser or evaporator fan motor.
It can easily be retrofitted by any air conditioning or refrigerant engineer, says Aermec. Benefits include decreased noise levels and precise room temperature and humidity control. It also protects the compressor from short cycling and there is no interference with existing controls.
“Aersave can help businesses significantly improve the energy efficiency of their chillers by as much as 50% whilst increasing their lifespan and boosting their ROI,” said Aermec UK MD Paul Lawrence.