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An algorithm to predict the transient moisture distribution for wall condensation under a steady flow field

机译：稳定流场下墙面凝结的瞬时水分分布预测算法

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摘要

The prediction and control of the indoor moisture distribution, especially for wall condensation, is very important for a healthy and energy-efficient environment. However, existing methods cannot accurately predict the transient indoor moisture distribution for wall condensation. In this study, the prediction of indoor transient moisture distribution is facilitated by using transient accessibility indices, which characterize the transport of the passive contaminants to describe boundary effects on the transient moisture distribution. An algebraic expression is obtained for the indoor moisture distribution, and a computational model is presented for the wall condensation problem. The model is validated by experiments and computational fluid dynamics (CFD) simulations, and the model is implemented for a wall condensation case study. The new model can easily predict the indoor moisture distribution under different boundary conditions and for a range of condensation time on the wall surfaces. This study provides an effective means of indoor moisture prediction and control, which may become an important tool for designing a non-uniform indoor environment.
机译：室内水分分布的预测和控制，特别是对于墙体结露，对于健康和节能的环境非常重要。但是，现有方法无法准确预测墙壁凝结的瞬时室内水分分布。在这项研究中，室内瞬态水分分布的预测是通过使用瞬态可及性指数来进行的，瞬态可及性指数表征了被动污染物的迁移，以描述对瞬态水分分布的边界效应。得到室内水分分布的代数表达式，并给出了墙体凝结问题的计算模型。该模型已通过实验和计算流体动力学（CFD）模拟进行了验证，并且该模型用于墙体冷凝案例研究。该新模型可以轻松预测在不同边界条件下以及墙面上一定范围的凝结时间下的室内水分分布。这项研究为室内湿度的预测和控制提供了有效的手段，这可能成为设计室内环境不均匀的重要工具。

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  • 来源
    《Building and Environment》 |2013年第9期|56-68|共13页
  • 作者

    Xiaojun Ma; Xianting Li; Xiaoliang Shao; Xuan Jiang;

  • 作者单位

    Department of Building Science, School of Architecture, Tsinghua University, Beijing 100084, China;

    Department of Building Science, School of Architecture, Tsinghua University, Beijing 100084, China;

    Department of Building Science, School of Architecture, Tsinghua University, Beijing 100084, China;

    Department of Building Science, School of Architecture, Tsinghua University, Beijing 100084, China;

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

    Moisture distribution; Condensation; Non-uniform indoor environment; CFD; HVAC;

    机译：水分分布;缩合;室内环境不均匀;差价合约暖通空调;

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