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Energy-saving technology of Daikin
Autonomous select type fixed tandem pump

Double pump specification achieve great energy-saving by adapting autonomous select type fixed tandem pump.

Flow combining/dividing selection can be independently controlled according to load pressure with a fixed displacement tandem pump (high and low) and selector. If high speed is needed, two high- and low- displacement pumps are combined to rotate at high speed to discharge at a higher flow rate. When the pressure is retained, only the low-displacement pump is selected to operate at low speed to achieve energy-savings.

Power Consumption = Pressure × Flow rate
Flow rate = Pump Capacity × Pump Rotating Speed

when the high pressure pump is under retained pressure conditon. the way to reduce power consumoption is to reduce the pump capacity.