Experimental study of natural convection heat transfer from a nonuniformly heated flat plate simulating PV panel

2018 ◽  
Vol 32 (1) ◽  
pp. 423-432 ◽  
Author(s):  
Shuang-Ying Wu ◽  
Ying-Ying Wu ◽  
Lan Xiao ◽  
Zhen Yang
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Natural Convection ◽  
Flat Plate ◽  
Convection Heat Transfer ◽  
Natural Convection Heat Transfer ◽  
Convection Heat ◽  
Pv Panel

scholarly journals Higher Order Accurate Transient Numerical Model to Evaluate the Natural Convection Heat Transfer in Flat Plate Solar Collector

Processes ◽  
2021 ◽  
Vol 9 (9) ◽  
pp. 1508
Author(s):  
Nagesh Babu Balam ◽  
Tabish Alam ◽  
Akhilesh Gupta ◽  
Paolo Blecich
Keyword(s):  
Heat Transfer ◽  
Natural Convection ◽  
Flat Plate ◽  
Solar Collector ◽  
Convection Heat Transfer ◽  
Air Gap ◽  
Convection Flow ◽  
Natural Convection Heat Transfer ◽  
Convection Heat ◽  
Flat Plate Solar Collector

The natural convection flow in the air gap between the absorber plate and glass cover of the flat plate solar collectors is predominantly evaluated based on the lumped capacitance method, which does not consider the spatial temperature gradients. With the recent advancements in the field of computational fluid dynamics, it became possible to study the natural convection heat transfer in the air gap of solar collectors with spatially resolved temperature gradients in the laminar regime. However, due to the relatively large temperature gradient in this air gap, the natural convection heat transfer lies in either the transitional regime or in the turbulent regime. This requires a very high grid density and a large convergence time for existing CFD methods. Higher order numerical methods are found to be effective for resolving turbulent flow phenomenon. Here we develop a non-dimensional transient numerical model for resolving the turbulent natural convection heat transfer in the air gap of a flat plate solar collector, which is fourth order accurate in both spatial and temporal domains. The developed model is validated against benchmark results available in the literature. An error of less than 5% is observed for the top heat loss coefficient parameter of the flat plate solar collector. Transient flow characteristics and various stages of natural convection flow development have been discussed. In addition, it was observed that the occurrence of flow mode transitions have a significant effect on the overall natural convection heat transfer.

scholarly journals Experimental Study of Natural Convection Heat Transfer to Non-Newtonian Fluids

1972 ◽  
Vol 38 (315) ◽  
pp. 2891-2896
Author(s):  
Tstsu FUJII ◽  
Osamu MlYATAKE ◽  
Motoo FUJII ◽  
Hiroshi TANAKA ◽  
Kentaro MURAKAMI
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Natural Convection ◽  
Convection Heat Transfer ◽  
Newtonian Fluids ◽  
Natural Convection Heat Transfer ◽  
Convection Heat

scholarly journals Passively Enhanced Natural Convection Heat Transfer via Swirl Effect

2021 ◽  
Author(s):  
L. Di Liddo ◽  
D. Naylor
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Natural Convection ◽  
Convective Heat Transfer ◽  
Transfer Rate ◽  
Swirling Flow ◽  
Convection Heat Transfer ◽  
Circular Disk ◽  
Natural Convection Heat Transfer ◽  
Convection Heat

A numerical and experimental study, in the preliminary stages, has been conducted examining the effect of swirling flow on the natural convective heat transfer rate from a flat, horizontal, heated, upward facing, isothermal circular disk surrounded by insulation.

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