Raźny Natalia, Dmitruk Anna, Nemś Artur, Nemś Magdalena, Naplocha Krzysztof
Department of Lightweight Elements Engineering, Foundry and Automation, Faculty of Mechanical Engineering, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland.
Department of Thermodynamics and Renewable Energy Sources, Faculty of Mechanical and Power Engineering, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland.
Materials (Basel). 2023 Jan 31;16(3):1207. doi: 10.3390/ma16031207.
Thermal performance was tested during cycling work for latent heat storage systems based on KNO and NaNO (weight ratio 54:46). For heat transfer improvement, cast aluminum honeycomb-shaped structures were produced via 3D printing of polymer model and investment casting. Different wall thicknesses were tested at 1.2 mm and 1.6 mm. The obtained results were compared to working cycles of pure PCM bed. The use of enhancers is reported to improve the rate of charging and discharging of the deposit. In the next step, the structures were examined with numerical simulation performed with ANSYS Fluent software. The wall thicknesses taken into consideration were the following: 0.8, 1.2, 1.6, and 2.0 mm. An insert with a greater wall thickness allows for smaller dT/dt and better heat distribution in the vessel. The investment casting process enables the manufacturing of complex structures of custom shapes without porosity and contamination.
对基于KNO和NaNO（重量比54:46）的潜热存储系统在循环工作过程中的热性能进行了测试。为了改善热传递，通过聚合物模型的3D打印和熔模铸造生产了铸铝蜂窝状结构。测试了1.2毫米和1.6毫米的不同壁厚。将获得的结果与纯相变材料床的工作循环进行了比较。据报道，使用增强剂可提高沉积物的充电和放电速率。下一步，使用ANSYS Fluent软件进行数值模拟对结构进行了检查。考虑的壁厚如下：0.8、1.2、1.6和2.0毫米。壁厚较大的插入物可使dT/dt更小，容器内的热分布更好。熔模铸造工艺能够制造无孔隙和无污染的定制形状复杂结构。
