Xia Yaowen, Lyu Saidong
Key Laboratory of Rural Energy Engineering of Yunnan and Solar Energy Research Institute, Yunnan Normal University, Kunming, Yunnan, 650092, China.
Heliyon. 2024 Jan 12;10(2):e24331. doi: 10.1016/j.heliyon.2024.e24331. eCollection 2024 Jan 30.
Indoor contaminant removal over 0.5 ≤ ≤ 5.0, 0.5 ≤ ≤ 5.0, and 50 ≤ ≤ 500 was investigated numerically, wherein refers to the Froude number, refers to the buoyancy ratio, and Re refers to the Reynolds number. As demonstrated, the ventilation effectiveness increased with increasing contaminant source intensity and air supply intensity at a constant air temperature, indicating that increase the fresh air can effectively eliminate contaminants in this case. At high air supply temperatures, the heat retention time and contaminant transport was extremely short, and the fresh air induced by strong natural convection floating lift was rapidly discharged. Additioanlly, the air supply intensity had significant effects on contaminant removal. Quantification of the ventilation effectiveness under the combined effects of air supply intensity, air supply temperature and contaminant source intensity was determined based on the results of direct numerical simulations.
对弗劳德数（Fr）满足0.5≤Fr≤5.0、浮力比（R）满足0.5≤R≤5.0以及雷诺数（Re）满足50≤Re≤500时的室内污染物去除情况进行了数值研究，其中Fr表示弗劳德数，R表示浮力比，Re表示雷诺数。结果表明，在恒定气温下，通风效率随污染物源强度和送风强度的增加而提高，这表明在这种情况下增加新鲜空气可有效去除污染物。在高送风温度下，热量保留时间和污染物传输极短，由强烈自然对流浮升力诱导的新鲜空气迅速排出。此外，送风强度对污染物去除有显著影响。基于直接数值模拟结果，确定了送风强度、送风温度和污染物源强度综合作用下通风效率的量化指标。
