Sage Journals: Discover world-class research

Abstract

Monthly-averaged daily global irradiation data are now easily available from NASA website. Using established models it is then possible to decompose the daily to averaged-hourly global irradiation. The missing link so far has been hourly averaged diffuse irradiation. In this article data was pooled from 10 UK locations to obtain a regression model to complete the above missing link. It was presently shown that the averaged-data regressions are distinctly different from previously available hour-by-hour regressions.

Practical application : The present work has explored a correlation between averaged-hourly diffuse and global irradiation using the diffuse ratio–clearness index envelope. Results show that a strong regression relationship is thus obtainable. The present work has therefore the potential for other similar research that may be followed up in a likewise manner.

Keywords

Solar radiation averaged-hourly diffuse fraction clearness index solar diffuse radiation model

Get full access to this article

View all access options for this article.

References

CIBSE/Met. Office hourly weather data. October 2005. WCD03-SET (issue 2). Design Summer Year/Test Reference Year.

CIBSE/Met. Office hourly weather data. 2002.

CIBSE future weather years. July 2009.

CIBSE Guide A. London: Chartered Institution of Building Services Engineers, 1999.

CIBSE Guide A. London: Chartered Institution of Building Services Engineers, 2006.

CIBSE Guide A. London: Chartered Institution of Building Services Engineers, 2014.

CIBSE Guide J. London: Chartered Institution of Building Services Engineers, 2000.

Muneer

Saluja

. Correlation between hourly diffuse and global solar irradiation for the UK. Building Serv Eng Res Technol 1986; 7(1): 37–43.

Page JK. The estimation of monthly mean values of daily total shortwave radiation on vertical and inclined surfaces from sunshine records for latitudes 40”N-40”s. In: Proceedings of the UN conference on new sources of energy, Rome, Italy, 21–31 August 1961. United Nations, paper no. 3515198.

10.

http://www.helioclim.org/esra/.

11.

Liu

Jordan

. The interrelationship and characteristic distribution of direct, diffuse and total solar radiation. Sol Energy 1960; 4: 1–19.

12.

Orgill

Hollands

KGT

. Correlation equation for hourly diffuse radiation on a horizontal surface. Sol Energy 1977; 19: 357–359.

13.

Erbs

Klein

Duffie

. Estimation of the diffuse radiation fraction for hourly, daily and monthly average global radiation. Sol Energy 1982; 28: 293–302.

14.

Reindl

Beckman

Duffie

. Diffuse fraction correlations. Sol Energy 1990; 45: 1–7.

15.

Hawlader

MNA

. Diffuse, global and extraterrestrial solar radiation for Singapore. Int J Ambient Energy 1984; 5: 31–38.

16.

Spencer

. A comparison of methods for estimating hourly diffuse solar-radiation from global solar-radiation. Sol Energy 1982; 29(1): 19–32.

17.

Chandrasekaran

Kumar

. Hourly diffuse fraction correlation at a tropical location. Sol Energy 1994; 53: 505–510.

18.

Boland

Scott

Luther

. Modeling the diffuse fraction of global solar radiation on a horizontal surface. Environmetrics 2001; 12: 103–116.

19.

Miguel

Bilbao

Aguiar

. Diffuse solar irradiation model evaluation in the north Mediterranean belt area. Sol Energy 2001; 70: 143–153.

20.

Oliveira

Escobedo

Machado

. Correlation models of diffuse solar radiation applied to the city of Sao Paulo, Brazil. Appl Energy 2002; 71: 59–73.

21.

Karatasou

Santamouris

Geros

. Analysis of experimental data on diffuse solar radiation in Athens, Greece, for building applications. Int J Sustain Energy 2003; 23(1–2): 1–11.

22.

Soares

Oliveira

Boznar

. Modeling hourly diffuse solar radiation in the city of Sao Paulo using a neural-network technique. Appl Energy 2004; 79: 201–201.

23.

http://eosweb.larc.nasa.gov/cgi-bin/sse/retscreen.cgi?email=rets@nrcan.gc.ca.

24.

Gago

Etxebarria

Tham

. Inter-relationship between mean-daily irradiation and temperature, and decomposition models for hourly irradiation and temperature. Int J Low-Carbon Technol 2011; 6: 22–37.

25.

Tham

Muneer

. Sol-air temperature and daylight illuminance profiles for the UKCP09 data sets. Build Environ 2011; 46: 1243–1250.

26.

Muneer

. Solar radiation and daylight models, 2nd ed. New York: Elsevier, 2004.

Monthly averaged-hourly solar diffuse radiation model for the UK

Abstract

Keywords

Get full access to this article

References