Effects of Radiant Floor Heating Integrated with Natural Ventilation on Flow and Dispersion in a Newly Decorated Residence
| Autor: | Peng-Yi Cui, Jia-Qi Wang, Feng Yang, Qing-Xia Zhao, Yuan-Dong Huang, Yong Yang, Wen-Quan Tao |
|---|---|
| Rok vydání: | 2022 |
| Předmět: |
Heating
Hot Temperature Health Toxicology and Mutagenesis Air Pollution Indoor Public Health Environmental and Occupational Health Temperature Environmental Pollutants Models Theoretical Ventilation numerical simulation radiant floor heating natural ventilation indoor air quality pollutant dispersion |
| Zdroj: | International Journal of Environmental Research and Public Health; Volume 19; Issue 24; Pages: 16889 |
| ISSN: | 1660-4601 |
| Popis: | To date, few studies have been conducted on the characteristics of flow and dispersion caused by indoor radiant floor heating integrated with natural ventilation. In this study, we employed reduced−scale numerical models validated by wind−tunnel experiments to investigate the influence of radiant floor heating integrated with natural ventilation on airflow, heat transfer, and pollutant dispersion within an isolated building. The Richardson number (Ri) was specified to characterize the interaction between the inflow inertia force and the buoyancy force caused by radiant floor heating. Several Ri cases from 0 to 26.65, coupled with cross− or single−sided ventilation, were considered. Model validation showed that the numerical model coupled with the RNG k-ε model was able to better predict the indoor buoyant flow and pollutant dispersion. The results showed that the similarity criterion of Ri equality should be first satisfied in order to study indoor mixed convection using the reduced−scale model, followed by Re−independence. For cross−ventilation, when Ri < 5.31, the incoming flow inertia force mainly dominates the indoor flow structure so that the ACH, indoor temperature, and pollutant distributions remain almost constant. When Ri > 5.31, the thermal buoyancy force becomes increasingly important, causing significant changes in indoor flow structures. However, for single−sided ventilation, when Ri > 5.31 and continues to increase, the buoyancy force mainly dominates the indoor flow structure, causing a significant increase in ACH, thus reducing the indoor average temperature and pollutant accumulation. |
| Databáze: | OpenAIRE |
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