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首页> 外文期刊>ASHRAE Transactions >Development of Models to Simulate the Part-Load Performance of Oversized ECM Fan-Powered Terminal Units
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Development of Models to Simulate the Part-Load Performance of Oversized ECM Fan-Powered Terminal Units

机译：模拟超大型ECM风扇终端单元的部分负载性能模型的开发

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摘要

Mathematical models were developed for estimating the performance of oversized fan-powered terminal units with electronically commutated motors in both constant and variable airflow applications. These models can be readily implemented in building energy simulation programs to estimate the annual energy use of fan-powered terminal units. The models were developed from data from 36 fan/motor combinations used in commercially available fan-powered terminal units with fan motors ranging from 0.33 to 1 hp (249 to 746 W) and fan static discharge pressures ranging from 0.1 to 0.50 in. w.g. (25 to 125 Pa). Data from six of the 36 fan/motor combinations were from parallel fan-powered terminal units. The required inputs for the constant airflow model included only the design airflow for the space and fraction oversizing relative to the design airflow to estimate the power and energy use of the fan-powered terminal unit. For the variable airflow model, the operating airflow rate was required in addition to the design airflow and fraction oversizing. The model developed for fixed airflow operations was used to analyze the impact of using fan-powered terminal units with electronically commutated motors in applications where the capacity of the unit is oversized relative to the design airflow but the unit is operated at the design airflow. The analysis showed a reduction in power (and energy use) of approximately 30% for a unitwhose capacity was 25% larger than the design airflow but was operated at the design airflow. A more general model was also developed for oversized fan-powered units in variable airflow applications. This general model could be programmed into building simulation programs to estimate power and energy savings of fan power terminal units used in variable airflow applications.
机译：开发了数学模型，用于估计在恒定和可变气流应用中带有电子换向电机的超大型风扇供电终端设备的性能。这些模型可以很容易地在建筑能耗模拟程序中实现，以估算风扇供电终端设备的年度能耗。这些模型是根据来自36种风扇/电动机组合的数据开发的，这些组合用于市售的风扇终端设备，风扇电动机的功率范围为0.33至1 hp（249至746 W），风扇的静态排气压力范围为0.1至0.50 in。w.g。 （25至125 Pa）。来自36个风扇/电动机组合中的六个的数据来自并行风扇供电的终端单元。恒定气流模型所需的输入仅包括空间的设计气流和相对于设计气流的过大尺寸，以估计风扇供电终端单元的功率和能量使用。对于可变气流模型，除了设计气流和分数过大之外，还需要工作气流速率。针对固定气流运行开发的模型用于分析在电子烟机中使用风扇供电终端单元和电子换向电机的影响，在这些应用中，该单元的容量相对于设计气流过大，但该单元以设计气流运行。分析显示，单位容量比设计气流大25％，但以设计气流运行时，功率（和能源使用）减少约30％。还为可变气流应用中的超大型风扇驱动单元开发了一个更通用的模型。可以将此通用模型编程到建筑仿真程序中，以估算用于可变气流应用中的风扇电源终端单元的功率和节能量。

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  • 来源
    《ASHRAE Transactions》 |2015年第2期|321-333|共13页
  • 作者

    Dennis L. ONeal;

  • 作者单位

    Baylor University, Waco, TX;

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  • 正文语种 eng
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