Research of Cooled Element Overheating in Heat Pipes

The paper is devoted to the study of overheating of the cooled element depending on the heat pipe material used in the cooling system and on the operating time. The analysis of the necessary conditions for the occurrence of convective motion and its interaction with energy exchange at the liquid-vapor interface in thermal capillary tubes was carried out. Two types of heat pipes have been investigated. A copper heat pipe with a powder wick and water as a working fluid, the other is an aluminum heat pipe with a wick in the form of curly grooves on the inner surface of the heat pipe using two types of working fluid, acetone and ammonia. Numerical modeling of the heat transfer capacity of the heat pipes under study was performed as part of the work.