کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
761175 1462900 2012 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Characterization of working fluid in vertically mounted finned U-shape twin heat pipe for electronic cooling
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
پیش نمایش صفحه اول مقاله
Characterization of working fluid in vertically mounted finned U-shape twin heat pipe for electronic cooling
چکیده انگلیسی

As part of the ongoing research on finned U-shape heat pipes for CPU cooling, the present work focuses on the characterization of working fluid in vertically oriented twin U-shape heat pipe, by taking into account the gravity of flow. Two-dimensional FE simulation is performed under natural and forced convection modes, by using ansys-flotran. The best heat input and coolant velocity for the simulations are determined experimentally, corresponding to the least thermal resistance. The wall temperatures at the evaporator, adiabatic and condenser sections, and the velocity and pressure distributions of vapor and liquid, are analyzed. The total heat input for minimum thermal resistance in both natural and forced convection is found to be 50 W, and the coolant velocity is 3 m/s. The predicted and experimental wall temperatures are found in excellent match. It is observed that for the present U-shape heat pipe configuration, the difference in evaporator and condenser temperatures is significantly small, resulting in enhanced heat transfer compared to the conventional heat pipes. The sintered copper wick has a small pore size, resulting in low wick permeability, leading to the generation of high capillary forces for anti-gravity applications.


► Detailed characterization of working fluid of vertical finned U-shape heat pipe.
► The present configuration, considering the working fluid, was not studied previously.
► The low difference in evaporator and condenser temperatures enhances heat transfer.
► The high pressure drop across the porous wick causes easy return flow of the liquid.
► The predicted evaporator and condenser temperatures are validated by experiment.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy Conversion and Management - Volume 62, October 2012, Pages 31–39
نویسندگان
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