Abstract：The flat micro heat pipe, a new type of heat transfer devices of gas-liquid two-phase flow, has more advantages
in the application of thermal control system with compact devices in the limited space, but its performance still
has great room to improve. On the basis of analyzing the working medium transport characteristics of flat micro heat pipe
with steam chamber, the micro heat pipe with a dimension of 45mm×16mm×1.75mm is designed and fabricated. The depth
of the steam chamber is 200μm. A micro heat pip in the same size without steam chamber is fabricated to compare the heat
transfer performance. Experimental results show that when the temperature difference between simulation and experiment
is around 10%, the images collected by high speed image acquisition system can be well in accordance with the simulation
results. When the input power is 6W, the balance temperature of heat pipe with steam chamber is 70.4℃ while the heat pipe
without steam chamber is 118℃ . Meanwhile, the equivalent temperature with steam chamber under the input power from
1W to 6W is lower than without steam chamber. Hence, the stream chamber has a great influence on reducing the gaseous
medium circulation resistance and improving the ability of heat production. The research work of this paper can provide
reference for optimization design of flat micro heat pipe.
2017, 
