This study investigated the impact of two types of internal blinds on the indoor thermal environment of a highly glazed office room in Istanbul during summer. The research examined four configurations: (i) no blinds, (ii) roller blinds, (iii) layered roller blinds in night mode and (iv) layered roller blinds in day mode. Measurements of air velocity, average radiation temperature, air temperature and relative humidity were conducted to assess thermal comfort. The findings revealed that internal blinds significantly influence thermal comfort in radiantly cooled office spaces during summer. Without blinds, the indoor environment only met ISO 7730 comfort category C, with average predicted mean vote (PMV) and predicted percentage of dissatisfied (PPD) values of 0.6 and 12.5%, respectively. However, with internal blinds, comfort categories A and B were achieved, resulting in improved thermal comfort levels, with average PMV and PPD values ranging from 0.2 to 0.3 and 6% to 7.5%, respectively. Roller blinds, in particular, proved highly effective in enhancing thermal comfort and reducing mean radiant and indoor air temperatures in highly glazed radiant cooling offices. This demonstrated their energy-efficient potential for improving indoor thermal comfort.

中文翻译：

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内部百叶窗对热舒适度的影响：带辐射板的办公室的实验分析

这项研究调查了夏季期间两种内部百叶窗对伊斯坦布尔一间高度玻璃化办公房间室内热环境的影响。该研究检查了四种配置：(i) 无百叶窗、(ii) 卷帘、(iii) 夜间模式下的分层卷帘和 (iv) 白天模式下的分层卷帘。通过测量空气流速、平均辐射温度、空气温度和相对湿度来评估热舒适度。研究结果表明，内部百叶窗会显着影响夏季辐射冷却办公空间的热舒适度。在没有百叶窗的情况下，室内环境仅符合 ISO 7730 舒适类别 C，平均预测平均投票 (PMV) 和预测不满意百分比 (PPD) 值分别为 0.6% 和 12.5%。然而，使用内部百叶窗，实现了 A 类和 B 类舒适度，从而提高了热舒适度，平均 PMV 和 PPD 值分别为 0.2 至 0.3 和 6% 至 7.5%。尤其是卷帘，事实证明在增强玻璃辐射冷却办公室的热舒适度和降低平均辐射温度和室内空气温度方面非常有效。这证明了它们在改善室内热舒适度方面的节能潜力。