Numerical and Parametric Study on Open-Type Ceiling Radiant Cooling Panel with Curved and Segmented Structure
Numerical and Parametric Study on Open-Type Ceiling Radiant Cooling Panel with Curved and Segmented Structure
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DOI：
10.3390/en16062705
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发表时间：
2023-03
期刊：
影响因子：
3.2
通讯作者：
Minzhi Ye;Ahmed A. Serageldin;K. Nagano
中科院分区：
文献类型：
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作者：
Minzhi Ye;Ahmed A. Serageldin;K. Nagano
悬挂式敞开式天花板辐射供冷板是近年来提出的一种新型地板辐射供冷系统。主要的挑战是改善其冷却性能，以克服其广泛使用的限制。因此，本研究旨在对曲线型和分段式CRCPs进行优化设计，以强化换热。建立了三维CFD模型，对安装在单个封闭房间内的CRCP的制冷量和换热系数进行了研究。面板结构的确定基于四个相关参数：面板曲率宽度(L，m)、面板曲率半径(r，m)、每个面板或面板段之间的空隙距离(d，m)和面板覆盖面积(ac，m2)。测定了面板的表面积(As、m2)和面板曲率宽度与半径的比值(L/r)。在7种不同的冷负荷条件下，对35个设计方案进行了比较，并进行了245个实例。结果表明，额定制冷量和换热系数随曲率半径的增大和曲率宽度的减小而增大。空隙距离对冷却性能的影响最为关键。通过结构优化，可以同时提高冷却性能，实现均匀的温度分布，减少面板数量。
A suspended open-type ceiling radiant cooling panel (CRCP) has been proposed recently. The main challenge is improving its cooling performance to overcome limitations for extensive use. Therefore, this study aims to optimize the design of CRCPs with curved and segmented structure to enhance heat transfer. A three-dimensional CFD model was developed to investigate the cooling capacity and heat transfer coefficient of the CRCPs installed inside a single enclosed room. Panel structure was determined based on four dependent parameters: the panel curvature width (L, m), the panel curvature radius (r, m), the void distance (d, m) between each panel or panel segment, and the panel coverage area (Ac, m2). The panel surface area (As, m2) and the ratio of panel curvature width to radius (L/r) were also examined. A total of 35 designs were compared under 7 different cooling load conditions, and 245 cases were carried out. The results show that the nominal cooling capacity and heat transfer coefficient rise with increasing curvature radius and decreasing curvature width. The void distance plays the most crucial role in influencing cooling performance. It is possible to simultaneously improve cooling performance, achieve uniform temperature distribution, and reduce the number of panels through structure optimization.