In this study, the performance of a micro-environment system was analysed and compared with diffused ceiling ventilation. In the analysed micro-environment low velocity radiant panel system, two low velocity units and radiant panels were installed above workstations to supply directly clean air to occupants and to cover the cooling power required. With diffused ceiling ventilation, all cooling demand is covered with air and thus, the airflow rate required is higher than with low velocity radiant panel system. The varied heat gain from 40 to 80 W/m2 consists of two seated dummies, laptops, monitors and simulated solar gain. The results show that with perimeter exhaust and local supply air, 8–13% reduction of the total cooling load required is possible, in comparison to the standard mixing systems. The average exhaust temperature was 0.7–1.9°C higher than average room air temperature at the workstation. Moreover, the mean air temperature with the low velocity radiant panel system at the occupied zone was 0.6°C lower than with diffused ceiling ventilation. With low velocity radiant panel system, the air velocity was less than 0.12 m/s in the occupied zone. Also, the draught rate was less than 10%. Furthermore, the air change efficiency with the low velocity radiant panel system was over 70% which is better than 44–49% efficiency with diffused ceiling ventilation.

中文翻译：

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局部低速机组结合辐射板和漫射天花板通风系统的实验比较

在这项研究中，对微环境系统的性能进行了分析，并与扩散天花板通风进行了比较。在分析的微环境低速辐射板系统中，两个低速装置和辐射板安装在工作站上方，以直接向居住者提供清洁空气并满足所需的冷却能力。使用扩散天花板通风，所有冷却需求都被空气覆盖，因此所需的气流速率高于低速辐射板系统。从 40 到 80 W/m2 的不同热量增益包括两个坐着的假人、笔记本电脑、显示器和模拟太阳能增益。结果表明，与标准混合系统相比，通过周边排气和局部送风，可以将所需的总冷却负荷降低 8-13%。平均排气温度为 0.7-1。比工作站的平均室温高 9°C。此外，在占用区使用低速辐射板系统的平均气温比扩散天花板通风低 0.6°C。使用低速辐射板系统，占用区的空气速度小于 0.12 m/s。此外，草案率低于 10%。此外，低速辐射板系统的换气效率超过 70%，优于扩散天花板通风的 44-49% 效率。草稿率低于10%。此外，低速辐射板系统的换气效率超过 70%，优于扩散天花板通风的 44-49% 效率。草稿率低于10%。此外，低速辐射板系统的换气效率超过 70%，优于扩散天花板通风的 44-49% 效率。