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首页> 外文期刊>Building and Environment >VEPZO - Velocity propagating zonal model for the estimation of the airflow pattern and temperature distribution in a confined space
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VEPZO - Velocity propagating zonal model for the estimation of the airflow pattern and temperature distribution in a confined space

机译：VEPZO-速度传播区域模型，用于估计密闭空间中的气流模式和温度分布

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摘要

The goal of this paper is to build a locally refined non-isothermal airflow model. This model should not need prior knowledge of the expected airflow pattern to allow the evaluation of many different configurations. For this a new zonal model, the VEPZO (VElocity Propagating ZOnal) model has been developed including the airflow velocity as a property of a zone and a viscous loss model to compute the airflow between the zones. The velocity information from a zone is passed to the flow models and is therefore propagated into the room. Instead of using the power law equation or specialized jet or plume correlations to model the airflow between two zones, an equation derived from the forces acting on a flow path is used. These forces generate an acceleration or deceleration of the airflow. Losses are modelled by viscous dissipation. Two other models, the singular loss and the buoyant singular loss model are presented too. These models can be used to model flow paths through e.g. windows or doors. Results using the VEPZO model are compared with data from two case studies used to validate other zonal models. Airflow and temperature distributions are comparable to the results calculated by other zonal models. Furthermore, the VEPZO model is compared to an experimental setup with several interacting heat sources, showing the strength of the approach not needing specialized correlations for these elements. The VEPZO model is implemented in the equation-based and object-oriented language Modelica and can therefore be interfaced to other physical models.
机译：本文的目的是建立一个局部精化的非等温气流模型。该模型不需要预先了解预期的气流模式即可评估许多不同的配置。为此，已经开发了一种新的区域模型，即VEPZO（速度传播ZOnal）模型，其中包括作为区域属性的气流速度和用于计算区域之间气流的粘性损失模型。来自某个区域的速度信息被传递到流模型，并因此传播到房间中。代替使用幂律方程或专门的射流或羽流相关性来模拟两个区域之间的气流，而是使用从作用在流路上的力得出的方程。这些力产生气流的加速或减速。损失由粘性耗散建模。还提出了另外两个模型，奇异损失模型和浮力奇异损失模型。这些模型可用于对通过例如窗户或门。将使用VEPZO模型的结果与用于验证其他区域模型的两个案例研究的数据进行比较。气流和温度分布与其他区域模型计算的结果相当。此外，将VEPZO模型与具有多个相互作用热源的实验设置进行了比较，显示了不需要这些元素进行专门关联的方法的优势。 VEPZO模型以基于方程式和面向对象的语言Modelica实现，因此可以与其他物理模型接口。

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  • 来源
    《Building and Environment》 |2012年第2期|p.183-194|共12页
  • 作者

    Victor Norrefeldt; Gunnar Grun; Klaus Sedlbauer;

  • 作者单位

    Department of Indoor Climate, Fraunhofer Institute for Building Physics, Post Box 1152, D-83601 Holzkirchen, Germany;

    Department of Indoor Climate, Fraunhofer Institute for Building Physics, Post Box 1152, D-83601 Holzkirchen, Germany;

    Department of Indoor Climate, Fraunhofer Institute for Building Physics, Post Box 1152, D-83601 Holzkirchen, Germany;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    zonal model; airflow pattern; simulation; modelica;

    机译：区域模型气流模式模拟;Modelica;

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