Solar global radiation and climate at Genova, Italy

1981 ◽  
Vol 29 (1-2) ◽  
pp. 129-135 ◽  
Author(s):  
A. Elena ◽  
G. Flocchini ◽  
V. Pasquale
Keyword(s):  
Global Radiation ◽  
Solar Global Radiation

Simulation on Solar Energy Collection to Power a Thermoacoustic Prime Mover Using Pressurized Hot Steam

2011 ◽  
Author(s):  
Ikhsan Setiawan ◽  
Makoto Nohtomi ◽  
Masafumi Katsuta
Keyword(s):  
Solar Energy ◽  
Global Radiation ◽  
Average Energy ◽  
Steam Pressure ◽  
Fresnel Lens ◽  
Water Volume ◽  
Prime Mover ◽  
Simple Simulation ◽  
Solar Global Radiation ◽  
Yogyakarta City

It has been performed a simple simulation and calculation on solar energy collection which is used indirectly to power a thermoacoustic prime mover by producing pressurized hot steam which would supply thermal energy to the prime mover via sealed-off hot heat exchangers. The solar energy collection took place in Yogyakarta City - Indonesia where the average energy of solar global radiation of 4.8 kWh/m2/day (17.3MJ/m2/day) is available around the year. The calculation including the amount of the remaining heat stored, steam pressure, and steam temperature for various areas of the collector unit (Fresnel lens) and volume of water, were done as a function of time for several days. We found that appropriate combinations of lens area and water volume would enable us to operate the thermoacoustic prime mover continuously all day and night.

scholarly journals Modelling of UV radiation variations at different time scales

2008 ◽  
Vol 26 (3) ◽  
pp. 441-446 ◽  
Author(s):  
J. L. Borkowski
Keyword(s):  
Uv Radiation ◽  
Time Scales ◽  
Time Scale ◽  
Global Radiation ◽  
Regression Method ◽  
Ozone Content ◽  
Explanatory Variables ◽  
Solar Uv ◽  
Solar Global Radiation ◽  
Different Time Scales

Abstract. Solar UV radiation variability in the period 1976–2006 is discussed with respect to the relative changes in the solar global radiation, ozone content, and cloudiness. All the variables were decomposed into separate components, representing variations of different time scales, using wavelet multi-resolution decomposition. The response of the UV radiation to the changes in the solar global radiation, ozone content, and cloudiness depends on the time scale, therefore, it seems reasonable to model separately the relation between UV and explanatory variables at different time scales. The wavelet components of the UV series are modelled and summed to obtain the fit of observed series. The results show that the coarser time scale components can be modelled with greater accuracy than fine scale components and the fitted values calculated by this method are in better agreement with observed values than values calculated by the regression method, in which variables were not decomposed. The residual standard error in the case of modelling with the use of wavelets is reduced by 14% in comparison to the regression method without decomposition.

scholarly journals Characterization and modeling of solar radiation on the ground, application to the estimate of solar potential available on the coast of Nouakchott

2019 ◽  
Vol 4 (1) ◽  
Author(s):  
A. Sidibba ◽  
D. Ndiaye ◽  
S. Bouhamady ◽  
M. El Bah
Keyword(s):  
Solar Radiation ◽  
Global Radiation ◽  
Theoretical Models ◽  
Empirical Models ◽  
Coefficient Of Determination ◽  
Time Step ◽  
Radiation Data ◽  
Dependent Model ◽  
One Year ◽  
Solar Global Radiation

The purpose of this work is to evaluate four empirical models developed in literature such as Ghouard, Perrin Brichambaut, Bird and Hulstrom and Dependent model of the Link trouble factor. The validation of these different theoretical models was carried out using solar global radiation data collected on the Cheikh Zayed Nouakchott power plant. These measurements were carried out at a time step of 5 minutes during the period of one year. (April 1, 2015 to March 31, 2016). The results show that the Ghouard model presents notable performances compared to the other models, with a determination coefficient of 96.2%. This validation also shows that the solar radiation measured and that estimated by the different models have the same pace and have good performance with a coefficient of determination greater than 93%. The available solar potential estimation was carried out using the actual measurements collected on the Cheikh Zayed plant. The results obtained showed that the available solar potential is 5 kWh / m² / d.

Solar global UV (280–380nm) radiation and its relationship with solar global radiation measured on the island of Cyprus

Energy ◽  
2006 ◽  
Vol 31 (14) ◽  
pp. 2728-2738 ◽  
Author(s):  
C JACOVIDES ◽  
V ASSIMAKOPOULOS ◽  
F TYMVIOS ◽  
K THEOPHILOU ◽  
D ASIMAKOPOULOS
Keyword(s):  
Global Radiation ◽  
Solar Global Radiation

Inter-comparison of different models for estimating clear sky solar global radiation for the Negev region of Israel

2007 ◽  
Vol 48 (1) ◽  
pp. 259-268 ◽  
Author(s):  
Amiran Ianetz ◽  
Vera Lyubansky ◽  
Ilan Setter ◽  
Boris Kriheli ◽  
Efim G. Evseev ◽  
...  
Keyword(s):  
Global Radiation ◽  
Clear Sky ◽  
Solar Global Radiation
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