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Портал Begell Электронная Бибилиотека e-Книги Журналы Справочники и Сборники статей Коллекции
Heat Transfer Research
Импакт фактор: 0.404 5-летний Импакт фактор: 0.8 SJR: 0.264 SNIP: 0.504 CiteScore™: 0.88

ISSN Печать: 1064-2285
ISSN Онлайн: 2162-6561

Выпуски:
Том 50, 2019 Том 49, 2018 Том 48, 2017 Том 47, 2016 Том 46, 2015 Том 45, 2014 Том 44, 2013 Том 43, 2012 Том 42, 2011 Том 41, 2010 Том 40, 2009 Том 39, 2008 Том 38, 2007 Том 37, 2006 Том 36, 2005 Том 35, 2004 Том 34, 2003 Том 33, 2002 Том 32, 2001 Том 31, 2000 Том 30, 1999 Том 29, 1998 Том 28, 1997

Heat Transfer Research

DOI: 10.1615/HeatTransRes.2016012503
pages 449-469

NUMERICAL OPTIMIZATION OF THE THERMAL PERFORMANCE OF A SOLAR AIR CHANNEL HAVING DISCRETE MULTI V-RIB ROUGHNESS ON THE ABSORBER PLATE

Anil Kumar
School of Mechanical and Civil Engineering, Shoolini University, Solan 173229; Himalayan Center of Excellence in Nanotechnology, Shoolini University, Solan 173229
R. P. Saini
Alternate Hydro Energy Centre, IIT, Roorkee, Uttarakhand-247667, India
J. S. Saini
Mechanical and Industrial Engineering Department, IIT, Roorkee, Uttarakhand-247667, India

Краткое описание

Rib roughness and different obstructions used in the path of the air passage in a solar air channel are used to increase the thermal performance by breaking the laminar sublayer or by increasing turbulence in the channel passage for air flow. This work is concerned with optimization of rib parameters of solar air channel based on thermal efficiency. The roughness produced on the absorber plate forms the wetted side of the upper broad wall of the rectangular solar air channel. The following quantities varied as: e/D from 0.022 to 0.043, Gd/Lv from 0.24 to 0.80, g/e from 0.5 to 1.5, α from 30° to 75°, P/e from 6.0 to 12.0, and W/w from 1.0 to 10.0. A methodology has been developed for predicting the thermal efficiency. A program was also developed in MATLAB for calculating the thermal efficiency. Based on the values of thermal efficiency, optimization has been carried out to determine the set of values of rib parameters that correspond to the maximum thermal efficiency for the given values of operating parameters of the channel. It was observed that the maximum values of the thermal efficiency and enhancement factor are 0.043 for e/D, 0.69 for Gd/Lv, 1.0 for g/e, 60° for α, 8.0 for P/e, and 6.0 for W/w. Finally, discrete multi v-rib shape solar air channel has been found to have better thermal efficiency as compared to other rib shapes of the solar air channel investigated by other researchers under similar numerical conditions.


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