毛细管+置换通风空调的实验研究和CFD模拟

Experimental study and CFD simulation on capillary with displacement ventilation system

文章对顶板辐射和地板辐射供冷2种空调系统进行对比后发现,地板辐射空调系统室内空气温度可能高于顶板辐射空调系统,但是地板辐射对人体的辐射量远大于顶板辐射,并且新风在地板辐射系统中能够更快地送入人员活动区,其除热效率更高,因此地板辐射供冷系统对人体的作用效果并不逊色于顶板辐射供冷。基于计算流体动力学(computational fluid dynamics,CFD)进行模拟验证,结果表明,顶板辐射与地板辐射2种方式供冷的误差不超过16%,考虑到室内模型布置较为复杂,误差在可接受范围内。

It can be found that the air temperature in floor radiant cooling system is higher than that in roof radiant cooling system,but the radiant level of the former is far higher than that of the latter after contrasting these two kinds of systems.Furthermore,fresh air can enter into the active area faster in floor radiant cooling system.It is more efficient to remove heat in floor radiant cooling system.So the floor radiant cooling system is not inferior to the roof radiant cooling system.The result of the simulation using computational fluid dynamics（CFD）shows that the error of two kinds of radiant cooling modes is 16% at most,which is acceptable in consideration of the complex indoor models.