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建立了辐射供冷末端设备的分析模型,通过对比耗节能率φ,效率系数ξ两个参数的变化情况,分析了不同室外环境干球温度及不同供回水温度对辐射供冷末端节能特性的影响。结果表明:供回水温度一定,φ和ξ均随室外干球温度的增大而减小,其中ξ的变化更为显著;室外干球温度一定,φ和ξ均随供回水平均温度的升高而变大,而平均温度不变时,φ和ξ随供回水的温差增大而减小。因此确定辐射供冷供回水温度时,在能达到供冷需求的前提下,应综合当地气候条件等因素,优先考虑采用平均温度高,温差小的供回水方案。
The analytical model of the terminal equipment for radiant cooling is established. By comparing the changes of the energy consumption rate φ and the efficiency coefficient ξ, the effect of dry-bulb temperature and different supply-return water temperatures on the radiation cooling end The impact of energy-saving features. The results show that φ and ξ both decrease with the increase of the outdoor dry-bulb temperature, and the ξ changes more obviously. The outdoor dry-bulb temperature is constant, φ and ξ both increase with the average temperature of the supply and return water Rise and become larger, and the average temperature does not change, φ and ξ with the supply and return water temperature increases and decreases. Therefore, when determining the supply and return water temperature for radiant cooling, under the premise of meeting the demand for cooling, we should give priority to adopting the supply and return solution with high average temperature and small temperature difference based on the local climatic conditions and other factors.