为了节能而对空气分配系统进行改造，通常需要将固定风量系统转换为可变风量（VAV）运行。对两个单风管系统进行了改造，该系统利用一台送风机和一台回风机来冷却办公楼的内部区域。VAV运行的改造包括将变频驱动器应用于风扇，以及测试几种气流控制替代技术。现场数据采集系统用于记录几种控制策略对最小外部空气控制、室温和风扇能耗的影响。两个系统的能源消耗在一个周期内进行了监测- 一年的正常运行期。介绍了改造前后记录的能耗数据。对于一个系统，与定容运行相比，改造后的系统每年可节省46.5%的能源；另一个系统要求略低的平均冷负荷，在一年的监测期内平均减少了53.9%。本文描述了用变速风扇控制系统测试的特定控制策略，并就其适用性和对VAV系统中使用的其他控制回路的影响提出了几点建议。引文:研讨会，ASHRAE交易，1984年，第90卷，pt。密苏里州堪萨斯城2B

Retrofit of air distribution systems for energy conservation frequently involves conversion of a fixed air volume system to variable air volume (VAV) operation. Two single-duct systems utilizing a single supply and single return fan for cooling the interior zone of an office building were modified. The retrofit to VAV operation involved the application of variable frequency drives to the fans and the testing of several alternative techniques for airflow control. An on-site data acquisition system was used to record the effect of several control strategies on minimum outside air control, room temperature, and fan energy consumption.Energy consumption of two systems was monitored during a one-year period of regular operation. Energy consumption data recorded before and after the retrofit are presented. For one system, the retrofit yielded an annual energy savings of 46.5 percent relative to constant volume operation; the other system, requiring a slightly lower average cooling load, provided an average reduction of 53.9% for the one-year monitoring period.The paper describes the particular control strategies tested with the variable speed fan control system and makes several recommendations regarding their suitability and effect on other control loops used in VAV systems.