利用来自五个城市的每小时天气数据，评估和比较了小型办公楼中固定和可变气流系列风机驱动终端装置（FPTU）的年度能源使用情况:德克萨斯州休斯顿；亚利桑那州凤凰城；CA旧金山；纽约；伊利诺伊州芝加哥。通过在工程方程求解器（EES 2016）中实施之前开发的（O’Neal et al.2016）质量和能量平衡模型，估算年度能源使用量。假设固定气流系列FPTU带有由可控硅整流器控制的永久分裂电容电机为基准。其他固定气流FPTU包括三个带有电子换向电机的FPTU，其容量系数分别为0%、25%和50%。 本文中定义的容量系数是衡量FPTU最大气流与区域设计气流相比的大小。可变气流FPTUs还使用电子换向电机，其容量系数与设计负载（0%、25%和50%）有关。结果表明，无论是在固定或可变气流应用中，电子换向电机都具有节能潜力。由于FPTU适用于各种建筑类型和尺寸，因此小型办公楼的节约可能与大型建筑或为不同用途（医疗保健、零售等）设计的建筑的节约估算不同。 )，其中内部荷载可能与本文中模拟的小型办公楼不同。引用:无效

The annual energy use of fixed- and variable-airflow series fan-powered terminal units (FPTUs) in a small office building was evaluated and compared using the hourly weather data from five cities: Houston, TX; Phoenix, AZ; San Francisco, CA; New York, NY; and Chicago, IL. Annual energy use was estimated by implementing a previously developed (O'Neal et al. 2016) mass and energy balance model in Engineering Equation Solver (EES 2016). A fixed-airflow series FPTU with a permanent split capacitor motor controlled by a silicon-controlled rectifier was assumed to be the baseline. Other fixed-airflow FPTUs included three with electronically commutated motors with capacity factors of 0%, 25%, and 50%. The capacity factor, as defined in this paper, is a measure of how large the maximum airflow of the FPTU is compared to the design airflow of the zone. The variable-airflow FPTUs also used electronically commutated motors with three capacity factors relative to the design load (0%, 25%, and 50%). The results demonstrated the energy savings potential of electronically commutated motors whether applied in fixed- or variable- airflow applications. Because FPTUs are applied in a wide range of building types and sizes, the savings for a small office building may differ from the savings estimates for a larger building or for a building designed for a different purpose (healthcare, retail, etc.), where the internal loads may be different from those of the small office building modeled in this paper.