Journal Article10.1016/0038-092X(93)90039-Q
Heat and fluid flow in rectangular solar air heater ducts having transverse rib roughness on absorber plates
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TL;DR: In this paper, the effect of transverse wire roughness on heat and fluid flow characteristics in transitionally rough flow region (5 < e+ < 70) for rectangular solar air heater ducts with an absorbec plate having transverse wires roughness was investigated.
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About: This article is published in Solar Energy. The article was published on 01 Jul 1993. The article focuses on the topics: Nusselt number & Reynolds number.
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Citations
An active cooling system for photovoltaic modules
TL;DR: In this paper, a hybrid photovoltaic/thermal (PV/T) solar system was designed, fabricated and experimentally investigated in this work, where a parallel array of ducts with inlet/outlet manifold designed for uniform airflow distribution was attached to the back of the PV panel.
805
Development of correlations for Nusselt number and friction factor for solar air heater with roughened duct having arc-shaped wire as artificial roughness
S.K. Saini,R.P. Saini +1 more
TL;DR: In this paper, an experimental study has been carried out for enhancement of heat transfer coefficient of a solar air heater having roughened air duct provided with artificial roughness in the form of arc-shape parallel wire as roughness element.
337
Aspects and improvements of hybrid photovoltaic/thermal solar energy systems
TL;DR: In this article, a new type of hybrid photovoltaic/thermal (PV/T) collector with dual heat extraction operation, either with water or with air circulation is presented.
316
Heat transfer coefficient and friction factor correlations for the transitional flow regime in rib-roughened rectangular ducts
TL;DR: In this paper, an experimental investigation of heat transfer and friction for the flow of air in rectangular ducts with repeated chamfered rib-roughness on one broad wall is presented.
267
Heat transfer and fluid flow analysis of solar air heater: A review of CFD approach
Anil Singh Yadav,J.L. Bhagoria +1 more
TL;DR: In this paper, a detailed review of the literature that deals with the application of CFD in the design of solar air heater is presented, which proves that CFD is an effective tool for predicting the behavior and performance of a solar air heaters.
254
References
Friction factor measurements in a rectangular channel with walls of identical and non-identical roughness
TL;DR: Friction factor measurements have been made in a rectangular channel formed essentially by two flat plates roughened by transverse isolated square ribs as mentioned in this paper, and the results show only moderate agreement with similar results obtained from an annular channel.
22
Laws of Flow in Rough Pipes
J Nikuradse
- 01 Nov 1950
TL;DR: In this paper, an experimental investigation was made of the turbulent flow of water in pipes with various degrees of relative roughness, and the laws of resistance and velocity distributions were obtained as a function of the roughness and Reynolds number.
Heat-transfer and friction properties of surfaces with discrete roughnesses
N. Sheriff,P. Gumley +1 more
TL;DR: In this paper, a simple correlation on the basis of a non-dimensional roughness parameter e+ was found to be useful, but a more exact correlation on a two-layer model of the heat-transfer resistance was more exact.