Improved thermal performance of new staggered double P-type minichannel heat exchangers

•New type of heat exchanger designs with three inlets and outlets are proposed.•The performance of the novel heat sinks are studied by numerically and experimentally.•The effect of geometric parameters on the cooling ability is studied numerically.•The numerical results agree well with the numerical results. In order to obtain better thermal management performance, two heat sinks are proposed, namely, the enhanced design and the staggered double P-type design. Firstly, the effect of the inlet and outlet layout on the heat transfer ability of the conventional straight design is studied numerically. The results show that the conventional straight design with staggered inlet and outlet layout has better heat transfer performance. Secondly, the cooling performance of the enhanced design is numerically investigated. The results show that the maximum temperature of the enhanced design can be reduced by 41.71% compared to the conventional straight heat sink design. Thirdly, the cooling capacity of the staggered double P-type design is examined numerically and experimentally. The simulated results agree well with experimental results. The minimum substrate temperature difference is only 9.65 K. The maximum temperature of the staggered double P-type design can be reduced by 6.99 K. Moreover, the staggered double P-type design has the best heat dissipation ability among the three heat sinks. Then, the heat transfer capacities of the staggered double P-type at different inclination angle β of the V-type shunt channel and that at different inclination angle α of the confluence channel are studied. The results show that with the decrease of β, the heat transfer capacity of the staggered double P-type design is decreased, and the change trend of the heat transfer capacity with α is the same as that with β. When β = 30° and α = 90°, the heat transfer effect of the staggered double P-type design is the best.