鉴于EnergyPlus中风机驱动终端设备（FPTU）的建模能力有限，开发了一种遵循质量和能量平衡方法的替代模型，并在工程方程求解器（EES）中实现，以捕捉终端设备在一系列设计选项和操作特征下的性能。为了评估替代能源计算模型的能力，并调查FPTU设计方案的能源影响，一栋单层五区办公楼的年能耗为- 在EnergyPlus和EES中确定了管道可变风量（VAV）系统。在EnergyPlus和EES中，结合两种终端单元风扇电机类型、电子交流电机（ECM）的三个尺寸因子和五种气候条件，进行了参数化运行。尽管EnergyPlus和EES模型之间存在不同的建模假设，但对比分析表明，这两个模型都可用于量化固定气流FPTU的不同电机类型和设备过大产生的能量消耗。 与带永久分裂电容器（PSC）电机的系列FPTUS相比，结果显示，通过增加串联机组的节能系数，每年可节省3.5%-6.7%的能源。并联机组中增加CM尺寸系数的能源效益明显小于串联机组的节能效益，因为并联终端机组风扇的节电往往被补充加热的能源使用增加所抵消。在不考虑并联机组漏气对能量影响的情况下，结果表明，无论电机类型如何，并联机组总是比串联机组使用更少的年能量。 然而，战略规模的串联ECM FPTU可以缩小串联和并联FPTU之间的间隙能量使用。引文:2018年冬季会议，伊利诺伊州芝加哥，技术论文

Given the limited capacity of modeling fan-poweredterminal units (FPTUs) in EnergyPlus, an alternative modelfollowing the mass and energy balance approach was developedand implemented in Engineering Equation Solver (EES)to capture the terminal unit performance over a range of designoptions and operating characteristics. To evaluate the abilityof the alternative model for energy calculation and investigatethe energy impact of FPTU design options, the annual energyconsumption of a single-story, five-zone office building with asingle-duct variable-air-volume (VAV) system was determinedin EnergyPlus and EES. Parametric runs were performed inboth EnergyPlus and EES with the combination of two terminalunit fan motor types, three sizing factors for electronicallycommutated motors (ECMs), and five climate conditions.Although different modeling assumptions existed between theEnergyPlus and EES models, the comparative analysisrevealed that both models could be used to quantify the energysavings from different motor types and equipment oversizingfor fixed-airflow FPTUs. Compared to the energy use of seriesFPTUs with permanent split capacitor (PSC) motors, resultsshowed 3.5%-6.7% annual energy savings by increasing ECMsizing factors in series units. The energy benefit of increasingECM sizing factors in parallel units was significantly smallerthan the savings in series units because the electricity savingsfrom parallel terminal unit fans tended to be offset by theincreased energy use of supplemental heating. Without consideringthe energy impact of air leakage from parallel units,results showed that parallel units always used less annualenergy than series units regardless of motor type. However,strategically sized series ECM FPTUs could narrow the gapin energy use between series and parallel FPTUs.