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Quantification of the impact of temperature difference between two connected indoor spaces on ~(222)Rn concentration

机译：量化两个相连的室内空间之间的温差对〜（222）Rn浓度的影响

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摘要

Dependence of the indoor Rn-222 concentration on the temperature difference between two adjacent indoor spaces or rooms was investigated. The variations in Rn-222 concentration in a vessel with two orifices were measured at various inner-to-outer temperature differences, and were numerically modeled based on a theoretical consideration on the static pressure difference. An equation to calculate the decrease of Rn-222 concentration as a function of the temperature difference between two adjacent spaces was developed. The calculation results using the developed equation in this study, if the drag coefficient of the orifice flow was properly formulated as a function of the Reynolds number, were consistent with the measurement results. The equation developed in this study can be applied to the real case (rooms with several orifices). The approach taken in this study can also be performed to measure accurately a very low air flow (Reynolds number 100).
机译：研究了室内Rn-222浓度对两个相邻室内空间或房间之间的温差的依赖性。在不同的内外温差下测量带有两个孔的容器中Rn-222浓度的变化，并基于理论上对静压差的考虑进行数值建模。建立了一个方程，用于计算Rn-222浓度的降低与两个相邻空间之间的温差的关系。如果将孔流的阻力系数适当地公式化为雷诺数的函数，则使用本研究中开发的方程进行的计算结果与测量结果一致。本研究中开发的方程式可以应用于实际情况（具有多个孔的房间）。也可以执行本研究中采用的方法来准确测量非常低的气流（雷诺数<100）。

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