A thermal analytical model for predicting the temperature distribution of a cylindrical geometry evaporator of a loop heat pipe is presented. The wick structure proposed is made of a thin layer of sintered metal powder and is considered filled with working fluid. The resulting porous medium has a thin uniform layer thickness, and it is modeled as flat plate operating in steady-state condition, in a two-dimensional Cartesian coordinate. A Laplace-type equation is solved. The methods of separation of variables and superposition are used to solve the mathematical problem. A scale analysis is used to obtain an expression relating the wick geometry and thermophysical properties. With these models, the loop heat pipe evaporation limit, given by the porous media-casing interface temperature, which must be lower than the working fluid saturation temperature, can be determined. A statistical experiment analysis technique was employed to study the influence of several parameters in the thermal model. Mathematical model results were compared with numerical simulation data for a loop heat pipe evaporator. Using the mathematical tool developed, a copper cylindrical evaporator of a loop heat pipe was designed, constructed, and tested, using an experimental setup especially constructed for this purpose. The good comparison between analytical results and data validates the model proposed.


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    Title :

    Thermal Model for Sintered Cylindrical Evaporators of Loop Heat Pipes


    Contributors:

    Published in:

    Publication date :

    2016-07-19


    Size :

    13 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Thermal Model for Sintered Cylindrical Evaporators of Loop Heat Pipes(2150991)

    Mantelli, Marcia H. / Florez Mera, Juan P. / Milanese, Fernando H. | AIAA | 2015





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