In situ determination of the moisture buffer potential of room enclosures
In situ determination of the moisture buffer potential of room enclosures
复制标题
原位测定房间外壳的湿气缓冲潜力
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
H. Janssen
中科院分区：
文献类型：
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作者：
E. Vereecken;S. Roels;H. Janssen
室内空气品质、居住舒适性、建筑构件的耐久性和能耗与室内相对湿度的变化密切相关。由于室内饰面和物体有助于抑制相对湿度的峰值，因此有必要了解房间围护结构的湿度缓冲潜力，以便在整个建筑模拟中包含其影响。本文提出了一种就地测定房间围护结构湿度缓冲电势的方法。在几天的时间里，在房间里放置加湿器，并实施水分产生方案。根据测得的加卸载过程中相对湿度的增减，利用有效电容和有效透湿深度模型求解房间的湿度平衡，反求出房间的通风量和湿度缓冲电势。该方法在具有已知湿惯性的大型气候室中得到了良好的控制实验验证，并随后应用于真实的房间围栏。所提出的方法的主要优点是，通过简单而快速的实验，可以获得整个建筑围护结构的湿惯性的全面表征-包括所有内部饰面和多维室内物体，如家具、地毯、窗帘、书籍等。
Indoor air quality, occupant’s comfort, durability of building parts, and energy consumption are highly related to the variations in indoor relative humidity. Since interior finishes and objects assist in dampening the peaks in relative humidity, the knowledge of the moisture buffer potential of room enclosures is necessary to include its effect in whole-building simulations. In this article, a method for the in situ determination of the moisture buffer potential of room enclosures is presented. During a period of some days, a humidifier is placed in a room and a moisture production scheme is implemented. Based on the measured RH-increase and decrease during loading and unloading steps, the ventilation rate and moisture buffer potential of the room are determined inversely by solving the moisture balance of the room using the effective capacitance and effective moisture penetration depth models. The methodology is validated by well controlled experiments in a large climatic chamber with known hygric inertia, and afterwards applied to real room enclosures. Main advantage of the proposed method is that a simple and fast experiment allows obtaining a comprehensive characterization of the hygric inertia of the whole building enclosure — including all interior finishes and multidimensional interior objects such as furniture, carpets, drapes, books, etc.