Chong Jie ACT-V6 frequency converter in the central air conditioning system – ai
A pump Fans The need for energy saving
Building in central air-conditioning power consumption is large, the annual electricity consumption in air conditioning accounts for about 60%, the central air-conditioning energy saving is very important.
As central air conditioning systems must be designed according to the maximum load during the hottest weather, design and design margins to remain 10-20%, but actually most of the time air-conditioning is not running at full load condition there is more of the surplus ,. Therefore, the potential of saving more of them on the frozen host changes can be followed according to the load shedding load or chilled water pump and cooling water pump can not change with the load adjusted accordingly there is a big waste.
Pump flow and pressure fan system relies on Valve And by-pass regulation to complete, so inevitably there is a big loss and closure of large temperature difference between high pressure flow phenomena. Not only a waste of energy but also caused a large number of central air-conditioning the most reasonable results fail to end the situation. In order to solve these problems need to With loads of changes to transfer water pump Water Flow and close the next.
Again is due to pump fans with Y-starting mode motor starting current are 34 times the rated current of a 90KW motor, the starting current will reach 500A. In the impact of such a large current motor contactor life significantly decreased at the same time, starting and stopping when the mechanical shock when the water pump weeping phenomenon, easy to machine spare parts such as bearing damage the valve pipe to increase the maintenance workload and cost of spare parts.
Summary, in order to save Energy And cost, need to reform the system of the fan pump, after market research and understanding, using mature Inverter To achieve in order to save energy and extend the electrical contacts and mechanical spare parts valve bearing service life of the pipeline.
This is because the converter blower according to chilled water pump and cooling water pump water pump motor load changes in the speed of subsequent adjustment, central air-conditioning systems to meet the normal working situation, so that chilled water pump and cooling water pump for fans to make the appropriate adjustment. To save energy to pump water pump motor speed decreased motor case from the power grid will greatly reduce the energy absorption
Its reduced power consumption P = P01-(N1/N0) 31-type
To reduce the flow of Q = Q01-(N1/N0) 2-type
After which to change the speed of N1, N0 is the original motor speed, P0 is the original motor speed under motor power consumption, Q0 under the original motor speed pump flow generated.
Can be seen from the above formula to reduce traffic and speed reduction of a square is proportional to the reduction of power consumption is reduced and the speed is proportional to the cube
Assuming the original energy flow of 100 units for 100 units 10 units if the speed reduction
From 2-type Q = Q01-(N1/N0) = 1001 – (90/100) = 10 can be drawn traffic, but to change the power consumption of 10 units
From 1-type P = P0 [1 – (N1/N0) 3] = 1001 – (90/100) 3 = 27.1 can draw the power will be reduced by 27.1
Unit that is 27.1% less than the original
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