Qian Bo, Fan Hongri, Liu Gang, Zhang Jianrui, Li Pei
School of Mechanical and Automotive Engineering, Shanghai University of Engineering Science, Shanghai 201620, China.
School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China.
Materials (Basel). 2021 Nov 27;14(23):7248. doi: 10.3390/ma14237248.
A microchannel radiator is advantageous due to its high efficiency and large boiling heat transfer coefficient of two-phase flow. Based on the research of uniform lattice structures, this study proposed a microchannel heat exchanger with a nonuniform lattice structure. The calculation, optimal formation, and boiling heat transfer performance of the nonuniform lattice structure based on selective laser melting (SLM) were investigated, and heat exchange samples were successfully prepared using SLM. The porosity and pore morphology of the samples were analysed, and the contrast experiments of boiling heat transfer were conducted with deionised water. The results revealed that the heat flow density of the lattice structure was a minimum of 244% higher than that of the traditional liquid-cooled plate. The critical heat flux density of the lattice structure is 110 W∙cm, and the critical heat flux density of the traditional flat plate is 45 W∙cm. In addition, the effects of cell structures indicated that for frame cells, the heat transfer effect of nonuniform frames was inferior to that of uniform frames; for face-centred cubic (FCC) cells, the nonuniform and uniform frames exhibited the same trend. However, the heat flow density of FCC cells was 25% higher than that of frame structures.
微通道散热器因其高效性和两相流大沸腾传热系数而具有优势。基于对均匀晶格结构的研究，本研究提出了一种具有非均匀晶格结构的微通道热交换器。研究了基于选择性激光熔化（SLM）的非均匀晶格结构的计算、优化成型及沸腾传热性能，并利用SLM成功制备了热交换样品。分析了样品的孔隙率和孔形态，并用去离子水进行了沸腾传热对比实验。结果表明，晶格结构的热流密度比传统液冷板的热流密度至少高244%。晶格结构的临界热流密度为110 W∙cm，传统平板的临界热流密度为45 W∙cm。此外，胞元结构的影响表明，对于框架胞元，非均匀框架的传热效果不如均匀框架；对于面心立方（FCC）胞元，非均匀框架和均匀框架呈现相同趋势。然而，FCC胞元的热流密度比框架结构高25%。
