Numerical Study Of Flow Boiling Heat Transfer In Micro-channels Cold-plate And Its Deign Optimization

In view of the cooling requirements of electronic devices with high power and highheat flux, putting forward a plan of phase transformation cooling mode microchannelcold-plate which is based on the target of high energy efficiency and high reliability.Phase transformation cooling mode within microchannel cold-plate not only the flow ofworking medium can be used take away the heat, but also may be utilized the latent heatof vaporization take away a large amount of heat.The main contents are as follows:(1) Experimental and numerical research status ofmicrochannel heat exchanger device were studied according to the relevant technologymaterials and papers collected.(2) Realize the advantages of phase transformationcooling technology from the analysis of several kinds of electronic cooling technique; Aplan of a phase transformation cooling mode using microchannel cold-plate heatexchanger solutions according to the needs of IGBT which is a kind of photovoltaicpower with high heat density cooling of electronic components.(3) Microchannelcold-plate mathematical model is set up and meshed by hexahedral mesh as gridpartition method. To write phase transformation equation and establish the requiredworking material property database through user-defined function.(4) Further studiedthe flow boiling heat transfer characteristics of microchannel cold-plate are affectedthermal parameters and inlet mass flow rate of refrigerant and channels dimensionsimpact through comparing several multiphase turbulent model of FLUENT softwareand combining with phase transformation characteristics of refrigerant, optimizeddesign provide a basis for microchannel cold-plate.(5)Build prototype microchannelcold-plate where the separated type heat pipe system and analyze the heat transferperformance of microchannel cold-plate to meet the cooling needs under the multipleexperimental study conditions.Gradual study results are as follow:(1) Optimized this plan about the microchannelcold-plate for cooling electronic device IGBT from the analysis of numerical results ofcold-plate heat transfer performance and its performance in line with the actual heatexchanger needs is verified by the experimental methods.(2) Refrigerant R134a, R123and aluminum material properties database are written and phase transformationequation are prepared by user-defined function. To sum up, the research topic of thisarticle has certain theoretical value and practical significance in the field of electronicsradiator.