年間 18 号発行
ISSN 印刷: 1064-2285
ISSN オンライン: 2162-6561
Indexed in
NUMERICAL OPTIMIZATION OF THE THERMAL PERFORMANCE OF A SOLAR AIR CHANNEL HAVING DISCRETE MULTI V-RIB ROUGHNESS ON THE ABSORBER PLATE
要約
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.
-
Kumar Raj, Kumar Anil, Chauhan Ranchan, Sethi Muneesh, Heat transfer enhancement in solar air channel with broken multiple V-type baffle, Case Studies in Thermal Engineering, 8, 2016. Crossref
-
Kumar Raj, Kumar Anil, Sharma Ashutosh, Chauhan Ranchan, Sethi Muneesh, Experimental study of heat transfer enhancement in a rectangular duct distributed by multi V-perforated baffle of different relative baffle width, Heat and Mass Transfer, 53, 4, 2017. Crossref
-
Kumar Anil, Maithani Rajesh, Suri Amar Raj Singh, Numerical and experimental investigation of enhancement of heat transfer in dimpled rib heat exchanger tube, Heat and Mass Transfer, 53, 12, 2017. Crossref
-
Nadda Rahul, Kumar Anil, Maithani Rajesh, Kumar Raj, Investigation of thermal and hydrodynamic performance of impingement jets solar air passage with protrusion with combination arc obstacle on the heated plate, Experimental Heat Transfer, 31, 3, 2018. Crossref
-
Suri Amar Raj Singh, Kumar Anil, Maithani Rajesh, Convective heat transfer enhancement techniques of heat exchanger tubes: a review, International Journal of Ambient Energy, 39, 7, 2018. Crossref
-
Kumar Raj, Kumar Anil, Chauhan Ranchan, Maithani Rajesh, Comparative study of effect of various blockage arrangements on thermal hydraulic performance in a roughened air passage, Renewable and Sustainable Energy Reviews, 81, 2018. Crossref
-
Kumar Sunil, Kothiyal Alok Darshan, Bisht Mangal Singh, Kumar Anil, Numerical analysis of thermal hydraulic performance ofAl2O3–H2Onanofluid flowing through a protrusion obstacles square mini channel, Case Studies in Thermal Engineering, 9, 2017. Crossref
-
Kumar Anil, Kim Man-Hoe, Solar air-heating system with packed-bed energy-storage systems, Renewable and Sustainable Energy Reviews, 72, 2017. Crossref
-
Xi Lei, Xu Liang, Gao Jianmin, Zhao Zhen, Li Yunlong, Numerical analysis and optimization on flow and heat transfer performance of a steam-cooled ribbed channel, Case Studies in Thermal Engineering, 28, 2021. Crossref