Effect of Moisture on Thermal Performance and Energy Efficiency of Buildings with Lightweight Concrete Walls
Effect of Moisture on Thermal Performance and Energy Efficiency of Buildings with Lightweight Concrete Walls
复制标题
水分对轻质混凝土墙体建筑热工性能和能源效率的影响
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
A. Desjarlais
中科院分区：
文献类型：
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作者：
D. Gawin;J. Kośny;A. Desjarlais
本文的主要目的是分析水分对位于加州的住宅和商业建筑的稳态和动态热性能的影响时，轻质混凝土（LC）作为墙体材料的应用。测定了不同含水率下五种液晶的导热系数。然后，在LC墙的水分分布的年度记录产生的加州的气候条件下，使用HMTRA，一个复杂的计算机模型耦合的热量和水分在建筑材料中的传输。根据模拟结果，计算了建筑施工后连续几个月的月平均含水率，以评估LC墙的有效热性能。这些数据用于计算建筑物服务期前三年的能源使用量。采用DOE 2.1E计算机模型对位于加州萨克拉门托的一座牧场式住宅和一座商业建筑进行了分析。为了比较，类似的建筑物的年能耗，具有相同的热阻的墙壁，但建造使用钢螺栓和木框架墙，计算。LC墙屋是最节能的，无论是住宅还是商业建筑。
The main objective of this paper is to analyze the moisture effect on the steady-state and dynamic thermal performance of residential and commercial buildings located in California when Lightweight Concrete (LC) is applied as a material for wall construction. The thermal conductivity of five types of LC at various moisture contents was measured. Then, the annual record of moisture distribution in a LC wall was generated for California climatic conditions using HMTRA, a sophisticated computer model of coupled heat and moisture transfer in building materials. Based on the simulation results, the monthly average moisture content was calculated for evaluation of effective thermal properties of the LC wall during successive months after building construction. These data were applied to calculate the energy use during the first three years of building service time. A ranch style residential house and a commercial building located in Sacramento, California were analyzed using the DOE 2.1E computer model. For comparison, the annual energy consumption of similar buildings, with the same thermal resistance of the walls but constructed using steel studs and wood frame walls, was calculated. The LC wall house was the most energy efficient, for both residential and commercial buildings.