辐射供冷地面对围护结构内表面温度及室内热舒适的影响

Influence of Radiation Cooling Floor on Internal Surface Temperature of Envelope and Indoor Thermal Comfort

本文在分析室内平均辐射温度对人体舒适性作用的基础上,通过建立围护结构的传热模型,分析计算了辐射供冷地面对围护结构内表面温度及室内热舒适性的影响。结果表明,与传统空调相比,地板辐射供冷—置换通风系统中的辐射供冷地面能使围护结构内表面温度降低约0.4-1.3℃,可进一步降低室内的平均辐射温度。在相同室内温度条件下,室内舒适性指标PMV值比传统空调要小,因此在同等舒适条件下可提高室内设计温度约2.5-3℃。

In this paper, based on the influence of average indoor temperature on human comfort and the established envelope＇s heat transfer model, the radiation cooling floor＇s effect to the envelope＇s internal surface temperature and indoor thermal comfort were analyzed and calculated. The results indicated that, comparing to the traditional air-conditioning system, the envelope＇s internal surface temperature could be reduced about 0.4 - 1.3 ℃ by the radiation cooling floor of the floor radiation cooling--replacement ventilation system, also the indoor average radiation temperature could be lowered. Furthermore, under the same indoor air temperature condition, for the system that proposed in this paper, the value of PMV was less than that of the traditional air-conditioning system, therefore the indoor design temperature could be raised about 2.5 - 3 ℃ under the same thermal comfort level.