Design And Experimental Research Of Micro-channel Oscillating Heat Pipe Heat Exchanger

Micro-channel heat pipe heat exchanger is a small heat exchanger with forced convection which is widely used at present.However,due to the separation of condensing section and evaporation section,it cannot be used as a whole heat exchanger.As a new type of heat pipe using two-phase flow effectively and in a simple form,the oscillating heat pipe lacks application examples in the field of forced convection due to its small heat transfer area.In this paper,combining the advantages of microchannel heat exchanger and oscillating fluid-heat tube heat exchanger,a micro-channel oscillating heat pipes heat exchanger is designed and manufactured,and the heat transfer experiment is carried out.In this paper,ANSYS Fluent software is used to verify the numerical simulation of the design and calculation method of micro-channel heat exchanger,and it is pointed out that the influence of the number of fin layers on the design of heat exchanger should be paid attention to when the design and calculation method is applied.The numerical simulation results agree with the calculated results,and it is found that it is impossible to calculate the convective heat transfer coefficient directly when the number of fin layers is low,in view of this situation,a correction method is proposedUsing the heat pipe heat exchanger and the microchannel heat exchanger design basic method,combining with the oscillating flow characteristics of heat pipe,this paper summarizes the various types of oscillating flow tube heat exchanger design method,including circular tube,fin pipe and microchannel oscillation flow design method of heat pipe heat exchanger,and by using this method is designed to adapt to a run of microchannel oscillation flow under the condition of heat pipe heat exchanger.Natural convection and forced convection experiments were designed for the heat exchanger,and an experimental platform was built.It can be found through the experiment that the starting characteristic of this type of heat pipe is related to the Angle,and the starting characteristic is poor at 0°.When the forced convection velocity reaches the required working condition,the thermal resistance is only 0.08℃/W,the heat transfer effect meets the design requirements,the design process is reasonable,and the design and production are relatively successful.