▎ 摘　　要

The present research is carried out to examine the efficiency of a novel spiral liquid block for the cooling of electronic processors. To enhance the cooling efficiency, a biologically produced nanofluid having graphene nanoplatelets is considered. The numerical analyses are performed at different concentrations ranging from 0 to 0.1% for different Reynolds numbers (Re) and pumping powers. Furthermore, the performance of the spiral liquid block is compared with serpentine and base-plate liquid blocks. In the case of the spiral liquid block made from nickel, the mean temperature of the CPU surface reduces around 7 K when the concentration increases from 0 to 0.1% at Re = 500. Moreover, the thermal resistance declines up to 11.7% with increasing the concentration by 0.1%. In the case of constant pumping power, the spiral liquid block demonstrates the best cooling efficiency compared to the other types. The maximum value of the Figure of Merit (FoM) for the spiral liquid block is 4 times greater than that for the serpentine liquid block. Indeed, the unique structure of the spiral liquid block allows superior heat transfer with moderate pumping power, and this liquid block is recommended from the energy efficiency viewpoint. (C) 2020 Elsevier Ltd. All rights reserved.