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Full-Text Articles in Engineering
Effect Of The Variable Porosity On The Heat Transfer Process In Solar Air Receiver, Pei Wang, D. Y. Liu
Effect Of The Variable Porosity On The Heat Transfer Process In Solar Air Receiver, Pei Wang, D. Y. Liu
Sixth International Conference on Porous Media and Its Applications in Science, Engineering and Industry
Solar air receiver is the core component of central receiver system (CRS) in solar thermal power plants due to the unique feature of some porous medium like silicon carbide foam ceramic and so on. In the air receiver, the porous material receives the concentrated sunlight from the heliostat field and heats up the pumped inlet air by convection and radiation. The incident radiation is distributed in the inner space of the porous medium rather than located on the boundary of the heated face in the front of the receiver. Aiming at this phenomenon which called volumetric effect, we propose a …
Experimental Research On Internal Convection Heat Transfer Of Supercritical Pressure Co2 In Porous Media, Le Zhang, Pei-Xue Jiang, Rui-Na Xu, Zhen-Chuan Wang
Experimental Research On Internal Convection Heat Transfer Of Supercritical Pressure Co2 In Porous Media, Le Zhang, Pei-Xue Jiang, Rui-Na Xu, Zhen-Chuan Wang
Sixth International Conference on Porous Media and Its Applications in Science, Engineering and Industry
The flow and heat transfer of fluids at supercritical pressure in porous media has attracted much attention due to its extensive applications, such as supercritical water-cooled nuclear reactor, CO2 gas cooled reactor, transpiration cooling and supercritical CO2 solar thermal power generation system. There are mainly two theories to describe convection heat transfer in porous media, i.e., the local thermal equilibrium model (LTE) and the local thermal non-equilibrium model (LTNE). Compared with LTE model, the LTNE model is a more detailed model that uses two energy equations to describe heat transport in the solid and fluid. The internal heat …
Experimental Analysis Of Air Vortex Impingement Through Porous Screens, Xudong An, Howard Fultz, Fatemeh Hassanipour
Experimental Analysis Of Air Vortex Impingement Through Porous Screens, Xudong An, Howard Fultz, Fatemeh Hassanipour
5th International Conference on Porous Media and Their Applications in Science, Engineering and Industry
This paper presents the experimental analysis of air flow vortex propagation through porous screens. This study is conducted by a new and unique experimental setup for ve- locity measurements and visualization of air vortex interac- tion with porous screen. A custom-made, high-precision vortex generator provides a variety of velocity profiles for vortex generation with an unprecedented level of precision. The flow fields are captured with the use of a fog gener- ator and a high-speed CCD camera. The porous screens are constructed out of acrylic rods with various orientations, thickness, and porosities from rod separation. The results presented in this …
Multilayer Minichannel Heat Sinks: The Effect Of Porosity Scaling On Pressure Drop, Arun K. Karunanithi,, Fatemeh Hassanipour
Multilayer Minichannel Heat Sinks: The Effect Of Porosity Scaling On Pressure Drop, Arun K. Karunanithi,, Fatemeh Hassanipour
5th International Conference on Porous Media and Their Applications in Science, Engineering and Industry
Previous studies have shown that stacked multi-layer mini-channels heat sinks with square or circular channels have advantages over traditional single layered channels in terms of both pressure drop and thermal resistance. In this work, porous media is used in the multi-layered stacked mini-channels instead of square or rectangular channels and the effect of the same on pressure drop and thermal perfor- mance is studied. Porosity scaling is done between the lay- ers of porous media and is compared with unscaled stacked multilayer channel. Porosity scaling allows the porosity to vary from one layer to the next layer and could result …