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北方地区供暖情况下室内热环境数值分析

DOI: 10.3969/j.issn.1006-7043.201310074

Keywords: 建筑围护结构, 自然对流, 供暖, 数值模拟, 热环境, 散热器, 温度, 室内

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Abstract:

为研究建筑围护结构热工性能与供暖季室内散热器传热特性的关联性,采用一种修正的湍流k-ε模型对兰州地区某民用住宅室内热环境进行了数值分析,获得了该住宅在4种外墙类型情况下的散热器传热特性和室内流场、温度场分布。结果表明:在满足室内供暖温度要求条件下(室内平均温度达到18℃),散热器表面对流换热能力随外墙导热系数的增大而增大;室内形成了明显的温度分层现象,外墙导热系数越大,接近地板的温度越低,形成的"冷气湖"厚度自东墙朝西墙方向逐渐变薄;选择不同的外墙类型,室内速度场的变化很微弱。

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