结合辐射天花板技术和混合空气系统的组合系统可能是改善办公室热舒适性的解决方案，但当房间受到热负荷突然变化时，热瞬态响应可能比所有空气系统都慢。本研究的主要目的是评估在两种不同热负荷下，在冷却办公环境的瞬态条件下，预测平均投票率（PMV）和预测不满意百分比（PPD）指数的变化。在一个全尺寸试验室中进行了一项试验研究，以评估混合空气和天花板辐射冷却系统的办公室的瞬态热舒适条件。实验测试是在科尔多瓦大学的一个完整的实验室进行的。四个热假人被用来模拟房间里的人。试验室配有热球风速计、热电偶、电阻温度、全球温度和湿度探头。 获得了室内混合空气和辐射冷却系统产生的PMV和PPD以及工作温度。结果显示了不同案例研究中热舒适条件的演变、达到A类和C类热舒适所需的时间以及达到稳态条件所需的时间。本研究的结果有助于改进循环辐射天花板系统的控制策略，缩短对热负荷变化的响应时间。引用:ASHRAE论文CD:2014 ASHRAE冬季会议，纽约

A combined system that couples radiant ceiling technology with mixing air systems may be a solution to improve thermal comfort in offices, but the thermal transient response can be slower than all air systems when the room is subjected to a sudden change in thermal loads.The main objective of this study is to assess the changes of the Predicted Mean Vote (PMV) and the Predicted Percentage of Dissatisfied (PPD) indices under transient conditions in a cooled office environment under two different thermal loads. An experimental study is carried out in a full scale test room to evaluate transient thermal comfort conditions in an office with a combined mixing air and radiant ceiling cooling system.Experimental tests are carried out in a full-scale test room at the University of Cordoba. Four thermal manikins are used to simulate the people in the room. The test room is provided with hot-sphere anemometers, thermocouples, resistance temperature, globe temperature and humidity probes. It has been obtained the PMV and the PPD as well as the operative temperature generated by the combined mixing air and radiant cooling system in the room.The results show the evolution of the thermal comfort conditions, the time needed to reach the thermal comfort category A and category C and the time required to reach steady state conditions in different case studies. The results of this study can help to improve the strategies used for the control of hydronic radiant ceiling systems, reducing the time of response to changes in thermal loads.