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This study used linear regression analysis model to explore chilled water system of central air conditioning for energy saving of cooling water pump based on frequency conversion control of pumped. Research and analysis is divided two phases, the first phase is recording approach temperature and load rate (PLR; Partial Load Ratio) of cooling tower in variable frequency operational mode, then using linear regression analysis model to built the power consumption equation (KW/RT) of cooling water pump. Second phase will be to non-variable frequency operation modes to establish the same relationship equation, and then will be used the first phase record data that its wet bulb temperature and cooling towers PLR limits are in accordance with the second phase of the same range conditions, you can explore the power consumption difference of cooling water pump in variable frequency and non-variable frequency operational mode.Through this research and analysis, was informed that power consumption model error rate of less than 1%, also informed that variable frequency operational mode than non-variable frequency operational mode can save 782.8 kW (19.64%) in the quadratic regression analysis results. In three times regression analysis results can be saved 919.38 kW (22.3%). Accordingly, the present research findings and theoretical models can be used as cooling water pump energy saving, also can serve as the theoretical basis for other energy saving. |
