Experimental thermal performance characterization of flat grooved heat pipes

2015-06-15
Alijani, Hossein
Çetin, Barbaros
Akkuş, Yiğit
Dursunkaya, Zafer
Show full item record
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 United States License.
266
views
319
downloads
The thermal characterization of aluminum flat grooved heat pipes is performed experimentally for different groove dimensions. Three heat pipes with groove widths of 0.2 mm, 0.4 mm, and 1.5 mm are used in the experiments. The effect of the amount of the working fluid is extensively studied for each groove width. The results reveal that, although all three succeed in dissipating the heat input through the phase change of the working fluid by continuous evaporation and condensation, the effectiveness of the heat transfer increases with reduced groove width. Furthermore, it is observed that there exists an optimum operating point, where the temperature difference between the heating and cooling sections is at a minimum, and the magnitude of this temperature difference is a strong function of the groove width. To the best of the authors' knowledge, the combined effects of groove dimensions and the amount of the working fluid, from fully flooded to dry, is reported for the first time for aluminum flat grooved heat pipes.
Thermodynamics, Engineering, Mechanics
https://doi.org/10.1080/01457632.2018.1442395
https://hdl.handle.net/11511/28660
Heat Transfer Engineering
Department of Mechanical Engineering, Article

Suggestions

Experimental Thermal Performance Characterization of Flat Grooved Heat Pipes
Alijani, Hossein; ÇETİN, BARBAROS; Akkus, Yigit; Dursunkaya, Zafer (Informa UK Limited, 2019-06-15)
The thermal characterization of aluminum flat grooved heat pipes is performed experimentally for different groove dimensions. Three heat pipes with groove widths of 0.2 mm, 0.4 mm, and 1.5 mm are used in the experiments. The effect of the amount of the working fluid is extensively studied for each groove width. The results reveal that, although all three succeed in dissipating the heat input through the phase change of the working fluid by continuous evaporation and condensation, the effectiveness of the he...
EVALUATION OF FLUX MODELS FOR RADIATIVE-TRANSFER IN RECTANGULAR FURNACES
Selçuk, Nevin (1988-07-01)
Three flux-type models for three-dimensional radiative heat transfer were applied to the prediction of the radiative flux density and the source term of a box-shaped enclosure problem based on data reported previously on a large-scale experimental furnace with steep temperature gradients. The models, which are a six-term discrete ordinate model and two Schuster-Schwarzschild type six-flux models, were evaluated from the viewpoints of both predictive accuracy and computational economy by comparing their pred...
Thermal contact conductance of nominaly flat surfaces
Yüncü, Hafit (2006-11-01)
The variation of thermal conductance of contact has been investigated as a function of apparent contact pressure experimentally. Experimental data has been obtained for steel, brass, copper and aluminum test pieces having different surface roughness over a wide range of contact pressures. Experimental results are compared with the theoretical predictions of an existing theory. Comparison revealed good agreement of trend with the experimental data, however, numerical values vary widely. Theory can predict th...
Thermal stresses in elastic-plastic tubes with temperature-dependent mechanical and thermal properties
Orcan, Y; Eraslan, Ahmet Nedim (2001-11-01)
The thermoelastic-plastic deformations of internal heat-generating tubes are investigated by considering the temperature dependence of the thermal conductivity coefficient, Young's modulus, the coefficient of thermal expansion, and the yield limit of the material. A model describing the elastic-plastic behavior of the tube is developed. The model consists of a system of two second-order ordinary differential equations and a first-order ordinary differential equation involving nonlinear temperature-dependent...
ELASTIC-PLASTIC DEFORMATION OF A CENTRALLY HEATED CYLINDER
ORCAN, Y; GAMER, U (Springer Science and Business Media LLC, 1991-01-01)
Subject of the investigation is the deformation of a perfectly plastic cylinder with uniform temperature inside its cylindrical core and zero surface temperature. The calculation is based on Tresca's yield condition and the flow rule associated to it. For small radii of the hot core. a plastic region appears at the center and expands towards the surface of the cylinder with increasing core temperature. The other possibility is that, depending on the core radius, two plastic regions form one after the other ...
Citation Formats
H. Alijani, B. Çetin, Y. Akkuş, and Z. Dursunkaya, “Experimental thermal performance characterization of flat grooved heat pipes,” Heat Transfer Engineering, pp. 784–793, 2015, Accessed: 00, 2020. [Online]. Available: https://doi.org/10.1080/01457632.2018.1442395.
METU IIS - Integrated Information Service open@metu.edu.tr