0
Research Papers

Effect of Flow Area to Fluid Power and Turbine Pressure Drop Factor of Solar Chimney Power Plants

[+] Author and Article Information
Xinping Zhou

Department of Mechanics,
Huazhong University of Science and Technology,
Wuhan 430074, China
e-mail: xpzhou08@hust.edu.cn

Yangyang Xu, Yaxiong Hou

Department of Mechanics,
Huazhong University of Science and Technology,
Wuhan 430074, China

1Corresponding author.

Contributed by the Solar Energy Division of ASME for publication in the JOURNAL OF SOLAR ENERGY ENGINEERING: INCLUDING WIND ENERGY AND BUILDING ENERGY CONSERVATION. Manuscript received January 2, 2017; final manuscript received April 29, 2017; published online June 8, 2017. Assoc. Editor: M. Keith Sharp.

J. Sol. Energy Eng 139(4), 041012 (Jun 08, 2017) (9 pages) Paper No: SOL-17-1001; doi: 10.1115/1.4036774 History: Received January 02, 2017; Revised April 29, 2017

In this paper, a theoretical model of solar chimney power plants (SCPPs) is presented based on compressible ideal gas law assumptions. The theoretical optimal turbine pressure drop factors (TPDFs) for constant and nonconstant densities (CD and NCD) are studied, and the effects of flow area parameters examined. Results show that the theoretical optimal TPDF for CD is equal to 2/3 and is independent of the flow area parameters. Results also show that the theoretical optimal TPDF for NCD is close to 1 and is affected by the flow area parameters. However, the theoretical maximum fluid power (MFP) obtained for NCD is never attained in real life. For the actual states, the theoretical optimal TPDF for NCD is still effectively high enough. The TPDF and the fluid power for NCD increase with the reduction of the collector inlet area, and more precisely with the reduction of the chimney inlet area. The TPDF and the fluid power definitely increase with larger chimney flow area. The increase in the fluid power due to shape optimization of the SCPP is limited compared to that due to higher input heat flux of collector. Divergent-top and upward slanting roof shapes are recommended for the solar chimney and the solar collector, respectively, for better SCPP performance. Additionally, locations exposed to strong solar radiation are preferred for SCPPs.

FIGURES IN THIS ARTICLE
<>
Copyright © 2017 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Fig. 1

Schematic of SCPP with its four typical positions labeled

Grahic Jump Location
Fig. 2

Variations of: (a) MFR and flow rate for TMFPS, (b) CTRs for MFRS and TMFPS, and (c) theoretical optimal TPDFs for MFRS and TMFPS with rA14, rA34, and rA4ref, for constant effective input heat flux of 300 W/m2

Grahic Jump Location
Fig. 3

Variations of: (a) TPP, fluid power, (b) CTR and TPDF for NCD, and (a) fluid power for CD with flow rate

Grahic Jump Location
Fig. 4

Variations of CTR, TPP and fluid power with flow rate for CTR within 60 K

Grahic Jump Location
Fig. 5

Variations of: (a) TPDF and (b) fluid power with flow rate for different combinations of rA14 and rA34

Grahic Jump Location
Fig. 6

Variations of TPDF and fluid power with flow rate for different combinations of rA14, rA34, and rA4ref

Grahic Jump Location
Fig. 7

Variations of TPDF and fluid power with flow rate for different combinations of rA14, rA34, rA4ref, and q

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In