Effects of the Working Fluid Nature and the Capillary Structure on the Thermal Capacity of a Heat Pipe
Keywords:
Electronics cooling, Heat pipe, Heat transfer limit, Working fluid, Capillary structureAbstract
Heat pipes have applications in several areas of thermal engineering, including electronic components to spacecraft thrust chamber exchangers. Although they can transfer large amounts of heat over a spatially restricted interval, they exhibit several operating limitations. The properties of the working fluid, the capillary structure, the orientation of the pipe, the length and the diameter of the pipe, are parameters that affect these limits. The present study aims to numerically evaluate the heat transfer capacity of a heat pipe. A one-dimensional model is developed considering water, ammonia and sodium as working fluids. The capillary structure is taken to be a
wire mesh wick or a square groove, for which several operating thermal ranges are investigated. A comparative study for different properties of heat pipes has been performed using the Matlab® software.
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