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Diagram for principle of central air condition system |
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The heat exchange of this system is completed by two water circulation systems.
The temperature
difference
of return water and input (output) water of water circulation system represents the exchange
amount of heat.
It should be a rational control method to use the temperature of input (output) water
to control the speed of circulating water,
in order to control heat exchange rate. |
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Refit for energy saving of central air condition system by inverter |
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Control method for the cooling water circulation system |
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Achieve energy saving purpose through measuring the temperature difference of
intake water and return water by the control of frequency change. |
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Control method for the frozen water circulation system |
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Achieve energy saving purpose through the control of frequency change for the
temperature of
return water. |
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Advantage of inverter applied in air condition system |
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The noise is lower for the motor, fan operated under low speed. |
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The inverter has soft start function, so the simultaneous start torque and start current
will be reduced to save electricity. |
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In various sectors, common air condition system is designed at the peak load. However,
the peak load is only accounts for 5% of total operation time. It means the system is operated
under partial load at most time. So, there is big space for saving energy. |
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The inverter application in air condition system could be
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categorized into two parts |
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The inverter is used to control the pump. |
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The inverter is used to control the fan. |
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Actual Case |
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Energy-saving achievement ━A
well-known Hotel in Taichung |
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Save electricity expense :
Save around 1,054,080KWH/yr of electricity, and cut emission of
CO2 695,692Kg/yr . |
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Save money :
Based on NT$ 1.8/DEGREE , cost saving will be = 1,054,080 x 1.8 = 1,897,344. |
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