Design and optimization of novel composite bionic pinnate leaf and spider web microchannel heat exchanger

The heat dissipation structure was developed using a composite bionic design method. An adjoint solver optimized the shape of the heat dissipation structure to achieve a more uniform temperature and velocity distribution, addressing the heat dissipation challenges of high-performance electronic equipment. Additionally, 3D metal printing technology was employed for performance testing. This study primarily examined the effects of flow channel geometry (pressure drop), inlet flow rate, and working fluid type on the heat transfer efficiency and the uniformity of temperature and velocity distribution in microchannel heat exchangers. The pressure drop was reduced by 50.63% (from 0.079 MPa to 0.039 MPa), and the maximum temperature decreased by 7.2 K. As the inlet flow rate increased, the heat dissipation effect continued to improve. Regarding working fluid selection, the heat transfer efficiency of a calcium formate/water mixture surpassed that of ethylene glycol/water and propylene glycol/water mixtures; however, the latter two exhibit better temperature distribution uniformity. The final research findings offer an effective solution to the heat dissipation issues faced by high-performance equipment and present a novel approach to optimizing the design of microchannel heat exchangers, which holds significant reference value.