辐射供暖供冷室内热环境特性及热辐射场评价方法
Characteristics of indoor thermal environment and evaluation method of thermal radiation fields for radiant heating and cooling
摘要：
通过实验测试的方式研究了不同辐射供暖供冷系统室内热环境参数的空间分布规律,并提出了基于室内平均辐射温度的热辐射场评价方法。结果表明:地板辐射供暖系统与顶板辐射供冷系统室内垂直平均辐射温度差值为1.5 ℃左右,而地板辐射供冷系统与顶板辐射供暖系统室内垂直平均辐射温度差值能达到5.5 ℃。同时,地板辐射供暖与地板辐射供冷室内热辐射场非均匀度分别为2.4%～4.8%和4.5%～7.7%,而顶板辐射供暖与顶板辐射供冷室内热辐射场非均匀度分别为1.9%～3.5%和1.0%～2.6%。此外,地板辐射供暖供冷系统的热辐射效率均大于100%,而顶板辐射供暖供冷系统的热辐射效率均小于100%。因此,不同辐射供暖供冷系统室内热环境特性及热辐射场差异比较大,工程应用时应结合舒适性和节能性进行合理设计。
Abstract：
This study experimentally investigates the spatial distribution characteristics of indoor thermal environment parameters in different radiant heating and cooling systems, and proposes an evaluation method for thermal radiation fields based on indoor average radiant temperature. The results show that the vertical average radiant temperature difference between floor radiant heating and ceiling radiant cooling systems is approximately 1.5 ℃, while this difference reaches 5.5 ℃ between floor radiant cooling and ceiling radiant heating systems. Meanwhile, the thermal radiation field non-uniformity of floor radiant heating and cooling systems is 2.4%～4.8% and 4.5%～7.7%, respectively, whereas that of ceiling radiant heating and cooling systems is 1.9%～3.5% and 1.0%～2.6%, respectively. Additionally, the thermal radiation efficiency of floor-based systems exceeds 100%, while ceiling-based systems demonstrate the efficiency below 100%. Therefore, significant differences exist in indoor thermal environment characteristics and thermal radiation field performance among various radiant systems, suggesting that system design should consider both thermal comfort and energy efficiency in engineering applications.
Keywords:radiant heating and cooling; average radiant temperature; indoor thermal environment; non-uniformity of thermal radiation field; thermal radiation efficiency; evaluation method