传统的定风量系统比变风量（VAV）系统消耗的能量要大得多，因为无论区域负荷如何，都会向每个区域提供恒定的空气量。由于季节性和日负荷变化，这些恒定风量系统上可以安装变频驱动器（VFD），以减少系统能耗，而无需改造接线盒。本文介绍了送风机速度控制的步骤及其在办公楼中的应用结果。结果显示，在六个月的时间里，电力节约23%，天然气节约19%。单位:I-PCitation:ASHRAE交易，第卷。 第115页。2、路易斯维尔2009

Traditional constant air volume systems consume significantly more energy than variable air volume (VAV) systems because a constant amount of air is supplied to each zone regardless of the zone load. Due to seasonal and daily load variations, variable frequency drives (VFDs) can be installed on these constant air volume systems to reduce system energy consumption without needing to retrofit the terminal box. This paper presents the procedures for supply fan speed control and the results of its application in an office building. The results show electricity savings of 23% and gas savings of 19% over a six-month period.Units: I-P