"Ω" Type Axial Groove Aluminum - Acetone Preparation And Heat Pipe Heat Transfer Performance Study

China is a developing country, which the level of comprehensive utilization on energy is low, using the existing energy in a reasonable and orderly way and environmental harmony is the goal of low carbon development. Based on the Research and Development of High Efficiency Heat Device and Utilize Low Temperature Burning Gas Technology (National Science and Technology Support Plan Subject), according to the basic theory of heat pipe and design method, aluminum-acetone heat pipes with axial Ω shape grooves were manufactured, the experiment platform was assembled and the heat pipes were measured.In this dissertation, the basic theory of heat pipe was summarized. The relationship between capillary pump pressure and maximum length of heat pipe, the flow pressure drop of two-phase in heat pipe, the relationship between liquid flow and steam-liquid surface pressure difference, the relationship between mass flow and heat flow, and eight kinds of heat pipe heat transfer limit were explained.The aluminum-acetone heat pipe with axial Ω shape grooves were designed and calculated. According to the melting point, boiling point and compatibility, acetone was chosen to be the working medium and the material of shell was made of D97. Considered to the effective capillary radius, permeability and thermal conductivity, axial Ω shape grooves structure was chosen to be the structure of wick. Groove number (N), external diameter (do), steam cavity diameter (dv), capillary core diameter (dc), narrow gap height (Dg), narrow gap width (w), porosity (ε), heat pipe length (1) and filling rate (ω) were determined.The heat pipe manufacturing process was determined, which includes manufacturing heat pipe shell, entrance welding, leakage detecting, high temperature degassing, filling medium, frozen vacuum, end sealing and preliminary testing, etc.A thermal performance test platform for heat pipe was assembled. The heat transfer performances of aluminum-acetone heat pipes with Ω shape grooves have been measured. The influence of temperature of heat source, tilting angle and filling rate on the start-up, the steady-state characteristics and thermal resistance of aluminum-acetone heat pipe were analyzed. The results show that with the increasing of the input power of heat source, and the decreasing of filling rate, the start-up time decreases. With the increasing of tilting angle, at the same input power of heat source, the axial temperature difference presents a trend for decreasing. However, for high filling rate heat pipe, the influence of tilting angle on steady-state characteristics is ignorable. With the increasing inner steam temperature, at the same input power of heat source, the heat transfer ability of heat pipe increasing. The greater the power input, the lower the heat pipe heat resistance, but the input power have certain restriction. The work performance of aluminum-acetone heat pipe with Ω shape grooves is very well, which can be used for the low temperature zone of recovery of waste heat.