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| 含水层冷辐射墙面板的均匀性、传热系数和热阻研究 |
| Study on the Uniformity, Heat Transfer Coefficient, and Thermal Resistance of the Water Layer Radiant Cooling Wall Panel |
| 投稿时间：2025-01-19 修订日期：2025-03-01 |
| DOI： |
| 中文关键词: 辐射供冷 传热系数 供冷量 温度均匀性 |
| 英文关键词:radiant cooling heat transfer coefficient cooling capacity temperature uniformity |
| 基金项目:国家自然科学基金青年科学基金(51708272) |
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| 摘要点击次数: 3 |
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| 中文摘要: |
| 试验研究了运行参数对含水层冷辐射墙板温度均匀性和供冷量的影响。分析了含水层辐射板的传热系数，以及其与含空气层辐射板的内部热阻差异。结果显示，供水温度和空气温度对辐射板的温度均匀性和供冷量影响最显著。温度均匀性指数（Weltens uniformity index ,UI）随供水温度增加而增大，随空气温度增加而减小。该辐射板的温度均匀性很好 ，UI最高可达0.995。含水层辐射墙板的平均对流传热系数为2.94 W/(m2·℃)，辐射换热系数为5.14 W/(m2·℃)，总换热系数为7.33 W/(m2·℃)。含空气层辐射板内部热阻平均值为0.0692 m2·℃/W，而含水层冷辐射板内部热阻仅为0.0203 m2·℃/W，表明含水层冷辐射墙板具有较低的内部热阻。 |
| 英文摘要: |
| The experiment investigated the influence of operational parameters on the temperature uniformity and cooling capacity of the water layer radiant cooling wall panel. The heat transfer coefficient of water layer radiant panels was analyzed, along with the difference in internal thermal resistance compared to air-layer radiant panels. Results indicate that the supply water temperature and air temperature significantly affect the temperature uniformity and cooling capacity of the radiant panels. The Weltens uniformity index (UI) increases with the supply water temperature and decreases with the air temperature. The temperature uniformity of the radiant panels is high, with a maximum UI of 0.995. The average convective heat transfer coefficient of the water layer radiant wall panels is 2.94 W/(m2·℃), the radiant heat transfer coefficient is 5.14 W/(m2·℃), and the total heat transfer coefficient is 7.33 W/(m2·℃). The average internal thermal resistance of air layer radiant panels is 0.0692 m2·℃/W, while for water layer radiant cooling panels, it is only 0.0203 m2·℃/W, indicating a lower internal thermal resistance for the water layer radiant cooling wall panels. |
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