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Measurement And Simulation Of The Thermal Environment In The Built Space Under A Membrane Structure

机译：膜结构下建筑空间热环境的测量与模拟

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摘要

This paper presents a study to clarify characteristics of the summer thermal environment in an actual membrane structure with a semi-dosed space underneath by using field measurements and simulations. The first part of this paper describes the following findings from the field measurements conducted during a summer period: (1) the solar transmission through the membrane had a greatest impact on the thermal environment in the living space under the membrane structure during the daytime; (2) the mean radiant temperature (MRT) at the central part of the living space went higher than the air temperature due to heat storage in the ground and walls of surrounding buildings where radiation cooling to the sky was obstructed by the membrane. In the second part of the paper, a 3D CAD-based simulation tool (called the thermal environment simulator) developed by the authors' group was used to simulate the thermal environment in the test membrane structure. A comparison between the measured and simulated surface temperature of the membrane was carried out. As a result, it was found that the simulated results agreed well with the measurement data. In addition, the following subjects were discussed using the simulation tool: how the thermal environment under the membrane is influenced by changing the solar transmittance and absorptance of the membrane or changing the ground surface materials. Simulation results show that the simulation tool is able to provide a quantitative prediction and evaluation of the thermal environment in the living space under the membrane structure in terms of the surface temperature and mean radiant temperature distribution.
机译：本文提出了一项研究，以通过使用现场测量和模拟来弄清实际热膜结构在其下方具有半定量空间的实际膜结构中的特征。本文的第一部分描述了在夏季进行的野外测量得出的以下发现：（1）白天通过膜的阳光传输对白天膜结构下的居住空间的热环境影响最大； （2）由于地面和周围建筑物的墙壁中的热量储存，居住空间中央部分的平均辐射温度（MRT）高于空气温度，周围建筑物的墙壁被膜阻碍了向天空的辐射冷却。在本文的第二部分中，作者小组开发的基于3D CAD的模拟工具（称为热环境模拟器）用于模拟测试膜结构中的热环境。在膜的测量表面温度和模拟表面温度之间进行比较。结果，发现模拟结果与测量数据很好地吻合。此外，使用模拟工具讨论了以下主题：膜下的热环境如何通过改变膜的太阳透射率和吸收率或改变地面材料来影响。仿真结果表明，该仿真工具能够根据表面温度和平均辐射温度分布对膜结构下居住空间的热环境进行定量预测和评估。

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