Study on the Influence of Thermal Properties of Building Envelope on Indoor Pollutant Diffusion
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At present, China is in a critical period of 70% energy saving in buildings. In order to meet people’s needs for indoor lighting and permeability, the south wall of the same residence in cold region is replaced with the floor-to-ceiling window of Low-E glass in this paper. The realizable k − ε model was used to analyze the influence of outdoor environment conditions on indoor pollutant diffusion process and thermal comfort through different building envelope structure. The results show that the floor-to-ceiling window structure restrains the diffusion of pollutants from the floor at night. After 19 h diffusion, the average concentration value of indoor pollutant in the floor-to-ceiling window structure is 25.7% lower than that of the external wall structure. At this time, the indoor PMV values of the floor-to-ceiling window structure and the external wall structure are 0.14 and 0.05, respectively. And the average indoor temperature of the floor-to-ceiling window structure can meet the requirements of the average indoor temperature of floor heating.
KeywordsCold region Diffusion of pollutants Air quality
The project is supported by National Natural Science Foundation (Number 51,476,073, Number 51,266,004).
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