Composite wick heat pipe fabrication and performance study

Abstract

Abstract A composite wick heat pipe is designed and prepared: a copper mesh is fixed on the copper pipe, and copper powder is filled in the gap between the mesh and the mandrel through the mandrel. A test device is assembled to test the maximum thermal conductive power and temperature stabilization time of the heat pipe. The results show that: the composite wick structure and the copper powder structure compared with the ultimate heat transfer performance increased by 20%, when the heat capacity is increased, the overall temperature difference will increase accordingly, and the optimal liquid injection rate of 100%, the ultimate power of up to 100 W, when filling with powder, it has the best thermal conductivity, the ultimate heat transfer power in the state of gravity is three times higher than that of the state of resistance to gravity, and it is 28.6% higher than that in the state of horizontality. The composite wick structure starts 17.6% faster than the copper powder structure.