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research-article

Effects of Novel Collector Roof on Solar Chimney Power Plant Performance

[+] Author and Article Information
Fifi Elwekeel

Helwan University, Faculty of industrial Education, Cairo, Egypt
fifinew2000@yahoo.com

Antar Abdala

Helwan University, Faculty of Engineering, Matareya branch, Cairo 11718, Egypt
antar451@yahoo.com

Muhammad Rahman

Department of Mechanical Engineering, Wichita State University, Wichita, KS 67260-0133, United States
muhammad.rahman@wichita.edu

1Corresponding author.

ASME doi:10.1115/1.4041403 History: Received February 15, 2018; Revised August 28, 2018

Abstract

The effects of collector roughness shape on the performance of solar chimney power plant were investigated in this study. The roughness shapes of triangular, curved, and square grooves were chosen and were compared to smooth case. The performance parameters of solar radiation, updraft velocity, temperature distribution, static pressure, power, and Nusselt number were varied. The effects of number, position, height and width of the grooves on the performance were investigated. The results of this investigation show that the updraft velocity with the triangular groove increases by 1.5 times compared to the smooth case at solar radiation of 1000W/m2. At solar radiation of 1000 W/m2, the power increases by 169%, 96 % and 19% for triangular, curved, and square grooves, respectively compared to the smooth case. Moreover, the Nusselt number values with triangular groove and curved groove enhances by 42% and 26% respectively compared to the smooth case. The power increases by 1.98% for three grooves instead of using one groove at higher solar radiation. Increasing the groove height by 1.7 times, the power increases by 1.03 times at higher solar radiation. The power enhancement shows less sensitivity to the change of groove width at the higher solar radiation.

Copyright (c) 2018 by ASME
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