Nowadays, indoor air quality is no longer considered as providing thermal comfort. The pollutant concentration in the ambient air (CO₂, O₃, particulate matter, etc.) is an essential factor affecting both indoor air quality and human health negatively. Particle motion in a room is affected by air movements caused by heating systems and infiltration and needs to be examined. Therefore, this study aims to explain how infiltration rates in a room with floor heating affect both thermal conditions and particularly the particle concentration and distribution. In this study, the discrete phase model (DPM) was used for particle tracking using commercial software ANSYS FLUENT. It was assumed that drag, lift, thermophoretic and Brownian forces were affecting particle motions. It was seen that air change rates influence both thermal comfort and energy consumption as well as particle distribution significantly. It was found that increasing air change rates causes a rise in particle concentration in all sizes of particles, specifically for the lower parts of the room (below 0.75 m from the floor). It is recommended to place air purifying devices where the outdoor sourced air infiltrates the room. Additionally, an index that contains thermal comfort and particle concentration together was defined and its distribution in the room was examined. It is found that the air change rate is a critical factor in obtaining desired indoor air quality, but outdoor air conditions may worsen the indoor quality due to air pollution. As the air change rate significantly alters the airflow in the room, both thermal comfort perception and particle concentrations vary considerably.

中文翻译：

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不同换气速率的地板采暖室内空气质量的数值研究

如今，室内空气质量不再被认为可以提供热舒适性。环境空气中的污染物浓度（CO ₂，O ₃，颗粒物等）是负面影响室内空气质量和人体健康的重要因素。室内的颗粒运动受加热系统和渗透引起的空气运动影响，需要进行检查。因此，本研究旨在说明地板采暖的房间中的渗透率如何影响热条件，尤其是颗粒浓度和分布。在这项研究中，使用商业软件ANSYS FLUENT将离散相模型（DPM）用于颗粒跟踪。假定阻力，升力，热泳和布朗力影响粒子运动。可以看出，空气变化率会显着影响热舒适性和能量消耗以及颗粒分布。发现增加的空气变化率会导致所有尺寸的颗粒中的颗粒浓度增加，特别是对于房间的下部（离地面0.75 m以下）。建议将空气净化设备放置在室外空气渗入房间的地方。此外，定义了一个同时包含热舒适性和颗粒浓度的指标，并检查了其在房间中的分布。已经发现，换气速率是获得期望的室内空气质量的关键因素，但是室外空气条件可能由于空气污染而恶化室内质量。随着空气变化率显着改变房间内的气流，热舒适感和颗粒浓度都发生了很大变化。距地面75 m）。建议将空气净化装置放置在室外空气渗入房间的地方。此外，定义了一个同时包含热舒适性和颗粒浓度的指标，并检查了其在房间中的分布。已经发现，换气速率是获得期望的室内空气质量的关键因素，但是室外空气条件可能由于空气污染而恶化室内质量。随着空气变化率显着改变房间内的气流，热舒适感和颗粒浓度都发生了很大变化。距地面75 m）。建议将空气净化装置放置在室外空气渗入房间的地方。另外，定义了一个同时包含热舒适性和颗粒浓度的指标，并检查了其在房间中的分布。已经发现，换气速率是获得期望的室内空气质量的关键因素，但是室外空气条件可能由于空气污染而恶化室内质量。随着空气变化率显着改变房间内的气流，热舒适感和颗粒浓度都发生了很大变化。已经发现，换气速率是获得期望的室内空气质量的关键因素，但是室外空气条件可能由于空气污染而恶化室内质量。随着空气变化率显着改变房间内的气流，热舒适感和颗粒浓度都发生了很大变化。已经发现，换气速率是获得期望的室内空气质量的关键因素，但是室外空气条件可能由于空气污染而恶化室内质量。随着空气变化率显着改变房间内的气流，热舒适感和颗粒浓度都发生了很大变化。