Due to its unique geographical conditions,high-altitude cold regions has the characteristics of high altitude,low air pressure,low temperature,long heating period and high proportion of building energy consumption.However,for the low temperature floor radiation heating system performance and the indoor environment quality in the high-altitude area,there has few former research.Based on a low-temperature radiant floor heating system of the large space building which located in Shigatse,this paper analyzes the optimization of the temperature of supply and retum water temperature using Airpak simulation and filed test.This study will provide a reference for the application of low-temperature radiant floor heating system of large space buildings in high altitude and cold regions.By analyzing the indoor temperature distribution and the annual energy consumption of the system,the optimum water supply and return water temperature is 42 ℃/37℃.Compared with the design temperature of 47℃/42℃,While ensuring the comfort of the system energy consumption savings of about 4.59％.%高海拔寒冷地区因其独特的地理条件,具有海拔高、气压低、气温低等特点,建筑供暖期长,供暖能耗占建筑总能耗的比例较高.对于高海拔地区大空间建筑中低温地板辐射系统性能及室内环境质量,前人研究较少.以日喀则某大空间建筑低温地板辐射供暖系统为基础进行研究,使用Airpak模型与实测两种方法对其供回水温度进行优化分析,为高海拔寒冷地区大空间建筑低温地板辐射供暖系统的应用提供参考.通过对不同供回水温度工况下的室内温度分布和系统年运行能耗进行分析,得出最优供回水温度为42℃/37℃,与设计温度47℃/42℃相比,在保证舒适性的同时系统节约能耗约4.59％.
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