Natural convection primarily driven by the absorption of thermal energy known as penetrative or thermo-convection is a topic that generates attention due to its …
Review of the studies conducted on natural convection heat transfer and fluid flow in a vertical annulus. ... Physical configuration and coordinate system used by them is shown in Fig. 6. The results reveal higher heat transfer rates at …
Passive Solar Heating
Mars, the second-most studied planet in the Solar System, owing to a large number of space missions, has always allured and intrigued humanity. Carbon dioxide (95.5%), nitrogen (2.7%) and water ...
The article presents mathematical modeling of turbulent natural air convection in a heated photovoltaic solar panel. The considered problem, despite its …
Thus, the system is subjected to simultaneous cooling from above, volumetric heating, and heating from below, giving rise to radiation-induced natural convection. These complex interactions govern the thermofluid behavior of the receiver and influence its efficiency.
We find that sublimation-driven convection readily produces the observed polygonal structures if we ... In the outer Solar System, some of Pluto''s terrains rankamong the most emblematic ...
Natural convection is a crucial mechanisms in various industrial engineering usages including cooling devices for electronic components (Baïri et al., 2012), thermal insulation of buildings (Liu et al., 2011), solar energy fields (solar collectors (Mintsa Do Ango et
The proposed system''s preliminary study is performed using ANSYS Fluent 19.3 for a simplified 2-dimensional representation of the natural convection loop. The solar panel, which receives the solar energy, is located …
*The short version of the paper was presented at CUE2018, Jun 5-7, Shanghai, China. This paper is a substantial extension of the short version of the conference paper. Flow and heat transfer characteristics of natural convection in vertical air channels of double-skin
Cavity receivers used in solar power towers and dish concentrators may lose considerable energy by natural convection, which reduces the overall system efficiency. A validated ...
Natural convection with/without radiation of a hybrid solar system is examined. Heat transfer is increased notably as inclined angle increases from 0° to 60°. …
Moreover, natural convection is a primary heat-transport mechanism in solar buildings. In recent years, research has been conducted on heat transfer by natural convection in enclosures with complex geometries and nonuniform thermal-boundary conditions such as those found in real building applications.
Convection is single or multiphase fluid flow that occurs spontaneously due to the combined effects of material property heterogeneity and body forces on a fluid, most commonly density and gravity (see buoyancy). When the …
Simple analytic estimates and detailed numerical calculations show that the solar dynamo begins near the surface, rather than at the much-deeper tachocline.
In this research, a numerical analysis is accomplished aiming to investigate the effects of adding a new design fins arrangement to a vertical triplex tube latent heat storage system during the melting …
For solar thermal system such as a solar dryers, phase change materials (chemical energy storage), and the use of sensible heat storage materials such as bricks, pebbles, gravels, iron scraps are often used. The cost implication of the former also
Abstract In this study, the efficiency of air velocity on solar panels during cooling was studied based on temperature and solar radiation in the environment where the panels are located. When the panels cool down, the temperature of the rear panel decreases and, accordingly, the idle voltage of the panels increases. Currently, the most …
Heat transfer in molten salt in a cylinder tank is studied via simulation and experiment to obtain its natural convection heat transfer in a single energy storage tank. Simulation and experimental results show that the natural convection heat transfer of water in a cylinder tank fits well with Garon''s correlation. However, significant deviations occur …
The numerical results reveal natural convection in the cavity follows an initial stage, a transitional stage and a quasi-steady stage. Results indicate that volumetric absorption of …
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