벡터 제어 인버터 구동 원심펌프시스템의 에너지 절감 평가

Abstract

The purpose of this study is to achieve energy saving effect of inverter driving multistage centrifugal pump. For determiningthe operation points in the pump system, the system curves should be obtained experimentally. To get the system curves, threepumps combined in parallel and one pump operated with different rotational speeds. But for variable speed pump system,energy saving rates can not be evaluated from operation efficiencies. That is why operation efficiencies, system curves, dutycycles, and input powers of the pump system were measured by the constructed experimental apparatus. The duty cyclesegmented into different flow rates and weighting the average value for each segment by the interval time. The system wasoperated with two different periods. The mean duty cycles were collected from apartment and found that the system operatedat 40% and at 50% or below capacity. Measured energy saving rate was 58.16%. Estimating method of energy saving rate couldbe more effective operation index than that of operation efficiency.