离心式冷水机组主机变频的节能性研究——2010年上海世博会主题馆空调冷水机组设计研究

Study on energy conservation of centrifugal chiller with variable frequency --study on air conditioning system chiller design of 2010 Shanghai world Expo Theme Pavilion

世博会主题馆冷热源设计应充分考虑的是夏季冷负荷非常大，制冷主机的配置必须满足世博会期间最大冷负荷的需求，而冬季的热负荷相对非常小，过渡季主机负荷率更会有比较大的降低，在冷热源设计中应更加看重部分负荷下的性能系数。鉴于这一特性，对系统采用常规离心式冷水机组和变频离心式冷水机组的情况分别进行计算，得出离心式冷水机组采用变频技术有着很好的节能效果，且相比采用常规机组与变频机组结合的N＋1配置方式会有更好的节能性。

The cooling and heating source design of Expo Theme should be taken fully into account the very large summer cooling load. The chiller＇s configuration should meet the maximum cooling load requirement during the World Expo demand. The heat load in winter is veiny little and less in the transition quarter, so the design should more focus on the IPLV value. In response to these load characteristics, system performance with conventional centrifugal chiller and that with variable frequency centrifugal chiller are calculated respectively. The results show that the system with variable frequency centrifugal chiller has better energy conservation, and system with conventional units combined with variable frequency unit so called the N ＋ 1 configuration will be more good energy efficiency.