建筑室内热羽流与太阳能烟囱效应耦合性能研究

Research on the performance of the coupling effect of indoor thermal plume and solar chimney effect

通过三维数值模拟,研究了不同太阳辐射强度、内热源热流密度、内热源距地高度和内热源表面发射率对太阳能烟囱自然通风性能的影响规律,探究了太阳能烟囱效应与室内热源热羽流的相互耦合机理。研究结果表明:内热源热流密度和太阳辐射强度对太阳能烟囱的通风性能具有相互增益的效果,通风量最大增幅分别为23.3%和22.3%;太阳能烟囱通风量随着内热源距地高度的增加而增大,但其影响较小;当内热源表面热流密度较强时,增大内热源表面发射率可有效提高建筑太阳能烟囱自然通风量。研究结果为太阳能烟囱强化自然通风技术在具有高温内热源建筑中的应用提供参考和依据。

In this paper, the effects of different solar radiation intensity, heat flux density of internal heat source, height of internal heat source to ground and surface emissivity of internal heat source on natural ventilation performance of solar chimney are studied through three-dimensional numerical simulation, and the coupling mechanism between solar chimney effect and indoor heat source plume is explored. The results show that the heat flux density of the internal heat source and the solar radiation intensity have mutually beneficial effects on the ventilation performance of the solar chimney, the ventilation rate increased by 23.3% and 22.3% respectively.With the gradual increase of the height of the internal heat source from the ground, the ventilation rate of the chimney increases, but its impact is small. When the heat flux density on the surface of the internal heat source is strong, increasing the surface emissivity of the internal heat source can effectively increase the ventilation rate of the solar chimney. This study provides reference and basis for the application of solar chimney enhanced natural ventilation technology in buildings with high temperature internal heat source.