Technical Brief

Estimation and Applications of Clear Sky Global Horizontal Irradiance at the Equator

[+] Author and Article Information
Dazhi Yang

Solar Energy Research Institute of Singapore (SERIS),
National University of Singapore,
117574, Singapore
e-mail: seryangd@nus.edu.sg

Wilfred M. Walsh

Solar Energy Research Institute of Singapore (SERIS),
National University of Singapore,
117574, Singapore
e-mail: wwalsh@nus.edu.sg

Panida Jirutitijaroen

Assistant Professor
Department of Electrical and Computer Engineering,
National University of Singapore,
117583, Singapore
e-mail: elejp@nus.edu.sg

1Corresponding author.

Contributed by the Solar Energy Division of ASME for publication in the JOURNAL OF SOLAR ENERGY ENGINEERING. Manuscript received October 1, 2012; final manuscript received March 10, 2014; published online May 2, 2014. Assoc. Editor: Philippe Blanc.

J. Sol. Energy Eng 136(3), 034505 (May 02, 2014) (4 pages) Paper No: SOL-12-1258; doi: 10.1115/1.4027263 History: Received October 01, 2012; Revised March 10, 2014

We analyze Singapore global horizontal irradiance (GHI) measurements and propose a clear sky GHI model for equatorial regions. The empirical formulation simplifies the atmosphere radiative transfer to a single exponential term. The results are benchmarked using locally collected data. Two applications of the clear sky model are briefly discussed.

Copyright © 2014 by ASME
Your Session has timed out. Please sign back in to continue.



Grahic Jump Location
Fig. 1

Performance of the modified clear sky model for all clear sky situations at SERIS during year 2012. A root-mean-square error of 41.9 W/m2 is found.

Grahic Jump Location
Fig. 2

Performance of the modified clear sky model on 11 best clear sky ds during years 2011 to 2013 benchmarked with 5 min SERIS data. The dotted line gives the maximum value of modeled clear sky GHI.




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