Research On Cold Plate Topology Based On Random Distribution Of Heat Consumption

Cold plate is a heat exchanger widely used in medium and high power density electronic equipment.Cold plate can quickly take away the heat generated by each component in the equipment,and it has high reliability and stability.Reasonable design of cold plate runner is one of the key factors affecting the heat exchange capacity of cold plate.At present,most of the cold plate flow channel is one-time processing and forming.In practice,usually according to the specific heat source distribution form to design the flow channel,so that the universality of cold plate is poor.In order to effectively dissipate the heat of power devices at any position,it is necessary to design flow channel topology with good overall heat dissipation capacity.In order to achieve the purposes,this paper mainly carries out the following work:Firstly,the algorithm of stochastic distribution of heat consumption is used to simulate the randomness of power device distribution.Then a comprehensive evaluation method of cooling performance of cold plate is put forward,which includes the average temperature of cold plate,the maximum temperature rise of heat source and the pressure drop of cold plate.Then,under the random distribution of heat consumption,Fluent was used to carry out simulation and comparative study on the topological structure of various cold plate runner,and analyze the heat dissipation characteristics of various liquid cold plate runner topological structure.Finally the cold plate runner topological structure with the best heat dissipation performance is selected.Secondly,under the heat consumption of random distribution to study the structural parameters of the cold plate with Isight.Multi-objective analysis and comprehensive evaluation method analysis are used to study the impacts of related structural parameters on cooling performance of cold plate with the approximation model and optimization design based on approximation model.The final optimization results obtained by the two analysis methods are analyzed and verified,and the optimization result that meet the requirements is finally obtained,which improves the heat dissipation performance of the cold plate.Finally,in view of the poor heat dissipation performance of the optimized cold plate in its central area,additional flow channels are added to increase the flow distribution in the central area of the cold plate.Then an adaptive temperature control driver based on shape memory alloy is used to automatically adjust the opening of additional runner,so that the cold plate can automatically adjust the flow input to the central area according to the temperature of the central area,and finally achieve the goal of improving the temperature uniformity of the cold plate.