Conjugate Heat Transfer in Forced Air Cooling of Electronic Components

2020 ◽  
pp. 103-171
Author(s):  
Alfonso Ortega
Keyword(s):  
Heat Transfer ◽  
Conjugate Heat Transfer ◽  
Air Cooling ◽  
Electronic Components ◽  
Forced Air

A Two-Dimensional Conjugate Heat Transfer Model for Forced Air Cooling of an Electronic Device

1989 ◽  
Vol 111 (1) ◽  
pp. 41-45 ◽  
Author(s):  
A. Zebib ◽  
Y. K. Wo
Keyword(s):  
Heat Transfer ◽  
Conjugate Heat Transfer ◽  
Electronic Device ◽  
Transfer Problem ◽  
Maximum Temperature ◽  
Transfer Model ◽  
Air Cooling ◽  
Two Dimensional ◽  
Component Design ◽  
Forced Air

Thermal analysis of forced air cooling of an electronic component is modeled as a two-dimensional conjugate heat transfer problem. The velocity field in a constricted channel is first computed. Then, for a typical electronic module, the energy equation is solved with allowance for discontinuities in the thermal conductivity. Variation of the maximum temperature with the average air velocity is presented. The importance of our approach in evaluating possible benefits due to changes in component design and the limitations of the two-dimensional model are discussed.

Thermal Performance Maps for Forced Air Cooling of Ruggedized Electronics Enclosures

2007 ◽  
Author(s):  
Jesse VanEngelenhoven ◽  
Gary L. Solbrekken ◽  
Karl J. L. Geisler
Keyword(s):  
Heat Transfer ◽  
Pressure Drop ◽  
Heat Dissipation ◽  
Side Wall ◽  
Form Factors ◽  
Air Cooling ◽  
Heat Transfer Capacity ◽  
Flow Pressure ◽  
Forced Air ◽  
Analytic Models

Based on standard commercial form factors, this study explores chassis-level air cooling limits for ruggedized military electronics enclosures constrained by pressure drop requirements and fin manufacturing capabilities. Numeric and analytic models are developed and used to define a methodology for optimizing the geometry of longitudinal plate fins included in side wall ducts to maximize the amount of heat that can be dissipated from an air-cooled chassis. The results of these analyses are presented in the form of a performance map facilitate the identification of particular fin manufacturing process well-suited for a specified set of mass flow, pressure drop, and heat transfer requirements. Analysis results demonstrate that if isothermal boundaries can be achieved, the heat transfer capacity of the chassis will increase relative to isoflux boundary condition assumptions. As a means to this end, the incorporation of heat pipes into the chassis wall is explored to enhance heat spreading and approach the isothermal limits of heat dissipation in the airflow ducts.

scholarly journals Heat Transfer Enhancement of Forced Convection in Horizontal Channel with Heated Block due to Oscillation of Incoming Flow

2018 ◽  
Vol 7 (1) ◽  
Author(s):  
Abdelouahab Bouttout
Keyword(s):  
Heat Transfer ◽  
Forced Convection ◽  
Control Volume ◽  
Numerical Procedure ◽  
Horizontal Channel ◽  
Air Cooling ◽  
Electronic Components ◽  
Enhancement Of Heat Transfer ◽  
New Feature ◽  
Volume Method

The study in question consists to amplify the hydrodynamic and thermal instabilities by imposed pulsation during forced convection of air cooling of nine identical heated blocks simulate electronic components mounted on horizontal channel. The finite volume method has been used to solve the governing equations of unsteady forced convection. This approach uses control volume for velocities that are staggered with respect to those for temperature and pressure. The numerical procedure called SIMPLER is used to handle the pressure-velocity coupling. The results show that the time averaged Nusselt number for each heated block depends on the pulsation frequencies and is always larger than in the steady-state case. The new feature in this work is that we obtained a short band of frequencies which the enhancement of heat transfer of all electronic components is greater than 20 % compared with steady non pulsation flow. In addition, the gain in heat transfer Emax attainted the maximum value for the central blocks. Our numerical results were compared with other investigations and found to agree well with experimental data.

Effects of Cooling Air on Performance of Turbine Blade Based on CHT Simulation

2012 ◽  
Vol 184-185 ◽  
pp. 184-187
Author(s):  
Jing Li ◽  
Zhen Xia Liu ◽  
Zhong Ren
Keyword(s):  
Heat Transfer ◽  
Temperature Distribution ◽  
Surface Temperature ◽  
Turbine Blade ◽  
Conjugate Heat Transfer ◽  
Air Cooling ◽  
Work Efficiency ◽  
Surface Temperature Distribution ◽  
Heat Transfer Simulation ◽  
Cooling Air

A numerical model for conjugate heat transfer (CHT) simulation is established for a turbine blade with air cooling, and 3D heat transfer simulation is accomplished. Effects of different amount of cooling air on the surface temperature distribution, work, efficiency of turbine blade is studied. The results show that the surface temperature drops quickly with the increase of cooling air at beginning and then become mild, the blade work goes up, the efficiency goes down.

scholarly journals Cooling of a battery pack of a car, working on renewable energy

2018 ◽  
Vol 245 ◽  
pp. 15003 ◽  
Author(s):  
Ivan Kasatkin ◽  
Mikle Egorov ◽  
Evgeny Kotov ◽  
Evgeny Zakhlebaev
Keyword(s):  
Heat Transfer ◽  
Heat Dissipation ◽  
Heat Removal ◽  
Lithium Ion ◽  
Operating Mode ◽  
Engineering Calculation ◽  
Electrical Circuit ◽  
Thermal Engineering ◽  
Air Cooling ◽  
Forced Air

The aim of the work is to choose a method of a solar car battery cooling. The student engineering team of Peter the Great Petersburg Polytechnic University designs the car. The analysis of the electrical circuit of the battery is carried out, the heat release is estimated due to three factors. According to the conditions of reliable operation of the battery, it is necessary to maintain its temperature range below 45°C, which requires cooling. The paper analyzes the possibilities of liquid, air-cooling, compares the free and forced methods of convective heat transfer. For the normal operating mode of the electric vehicle, environmental temperature at the level up to 38°C, a criterion thermal engineering calculation of the forced air-cooling of the corridor assembly of 405 battery cells providing the required heat dissipation is performed. It is shown that relatively high values of the heat transfer coefficient are provided under turbulent flow conditions characterized by Reynolds criteria above 103. On the basis of an analysis of the steady-state stationary heat-removal regime, it was concluded that an air flow provides a temperature gradient, sufficient for cooling the lithium-ion battery of a Solar Car «Polytech Solar».

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