冷辐射板布置方式对办公室热环境影响的模拟研究

Simulation Study on the Influence of Radiant Cooling Panel Layout on Office Thermal Environment

辐射供冷常与置换通风系统结合使用以达到良好的舒适性和节能性。辐射供冷/置换通风系统用于办公环境时,冷辐射板的布置方式会对室内热环境产生影响。本文采用CFD方法,通过Airpak对冷辐射板分别置于办公室内顶棚、地板、侧墙上部和侧墙下部四种情况的换热过程进行模拟分析,得出了冷辐射板不同布置方式对应的室内温度场和流场。结果表明,在本文研究的4种布置方式中,垂直墙壁上侧布置的供冷效果最佳,其湍流浑浊区范围最小、热力分层高度最高,同时得到了最低的活动区域温度。

Radiant cooling is often collaborated with displacement ventilation system to achieve good thermal comfort and energy conservation. When a radiant cooling / displacement ventilation system is used in the office environment,the layout of the radiant cooling panels has effect on the indoor thermal environment. In this paper,simulations on the heat transfer process of four different layout ways of the radiant cooling panels in the office room,including in the ceiling,on the floor,on the upper-vertical walls and on the lower-vertical walls,were conducted by CFD method respectively via the software of Airpak. The corresponding indoor temperature field and flow field of the indoor air were obtained. Results show that among the four types of radiant cooling panel layout,the cooling efficiency of the case with the radiant cooling panels on the upper-vertical walls is the best,which has the smallest turbulent zone,the highest thermal stratification height and the lowest temperature in the occupied zone.