ACECR, Fars Branch, Shiraz, Iran.
J Environ Radioact. 2013 Feb;116:166-73. doi: 10.1016/j.jenvrad.2012.08.013. Epub 2012 Nov 16.
Radon is released from soil and building materials and can accumulate in residential buildings. Breathing radon and radon progeny for extended periods hazardous to health and can lead to lung cancer. Indoor air conditions and ventilation systems strongly influence indoor radon concentrations. This paper focuses on effects of air change rate, indoor temperature and relative humidity on indoor radon concentrations in a one family detached house in Stockholm, Sweden. In this study a heat recovery ventilation system unit was used to control the ventilation rate and a continuous radon monitor (CRM) was used to measure radon levels. FLUENT, a computational fluid dynamics (CFD) software package was used to simulate radon entry into the building and air change rate, indoor temperature and relative humidity effects using a numerical approach. The results from analytical solution, measurements and numerical simulations showed that air change rate, indoor temperature and moisture had significant effects on indoor radon concentration. Increasing air change rate reduces radon level and for a specific air change rate (in this work Ach = 0.5) there was a range of temperature and relative humidity that minimized radon levels. In this case study minimum radon levels were obtained at temperatures between 20 and 22 °C and a relative humidity of 50-60%.
氡气从土壤和建筑材料中释放出来，并可在住宅楼宇中积聚。长期吸入氡气及其子体对健康有害，并可能导致肺癌。室内空气条件和通风系统强烈影响室内氡浓度。本文专注于在瑞典斯德哥尔摩的一栋独立式住宅中，空气更换率、室内温度和相对湿度对室内氡浓度的影响。在这项研究中，使用热回收通风系统单元来控制通风率，使用连续氡监测器（CRM）来测量氡水平。FLUENT，一个计算流体动力学（CFD）软件包，被用于通过数值方法模拟氡进入建筑物以及空气更换率、室内温度和相对湿度的影响。分析解、测量和数值模拟的结果表明，空气更换率、室内温度和湿度对室内氡浓度有显著影响。增加空气更换率可降低氡气水平，而在特定的空气更换率（在这项工作中 Ach = 0.5）下，存在一个温度和相对湿度范围可使氡气水平最小化。在这个案例研究中，最低的氡气水平是在 20 到 22°C 之间的温度和 50-60%的相对湿度下获得的。
