Abstract
Performance of heat pipe not only depends on geometry, such as wall thickness, pipe material, but also the thermal properties of the working fluid, such as latent heat, vapor pressure, viscosity, pressure and vacuum. We develop a experiment for Permeability, Maximum Capillary Diameter, Porosity, and the maximum of heat transfer. These experimental data will compare with HPPS. HPPS (heat pipe performance Simulation program software) is a software made by the advanced cooling heat laboratory Taiwan Tsinghua University to predict heat pipe performance with capillary structure theory, and its parameters include various heat pipe materials, different working fluids, vacuum degree, filling volume and operating temperature setting. Maximum heat transfer in different condition such as vacuum different degrees, or filling volume can be measured by experiments. importance of each parameters can also be discussed. Experiment for heat pipe’s wick geometric parameters of H company and C company. The Permeability of two company is 2.57×10-13m2、0.327×10-13m2 The Maximum Capillary Diameter of two company is 8.08×10-6m、9.09×10-6m The Porosity of two company is 0.559、0.621. Experiment the maximum of heat transfer with standard way, compare with 6φ sintered copper heat pipe of H company and the self made heat pipe. When the working fluid is water in 50℃ with filing volume 30% the maximum heat transfer is 45W; Under the same conditions the maximum heat transfer is 25W of H company. When vacuum from 1torr to 10-4torr, the maximum heat transfer will from 35W to 45W.