scholarly journals Solar radiation flux and insolation data for southern Idaho

1975 ◽  
Author(s):  
C.J. Buchenauer
Keyword(s):  
Solar Radiation ◽  
Radiation Flux ◽  
Solar Radiation Flux

Evaluation of daily solar radiation flux using soft computing approaches based on different meteorological information: peninsula vs continent

2018 ◽  
Vol 137 (1-2) ◽  
pp. 693-712 ◽  
Author(s):  
Sungwon Kim ◽  
Youngmin Seo ◽  
Mohammad Rezaie-Balf ◽  
Ozgur Kisi ◽  
Mohammad Ali Ghorbani ◽  
...  
Keyword(s):  
Solar Radiation ◽  
Soft Computing ◽  
Radiation Flux ◽  
Solar Radiation Flux

scholarly journals Predicting the Cooling Potential of Different Shading Methods for Greenhouses in Arid Regions

Energies ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4716 ◽  
Author(s):  
Ahmed Abdel-Ghany ◽  
Ibrahim Al-Helal ◽  
Fahad Alkoaik ◽  
Abdullah Alsadon ◽  
Mohamed Shady ◽  
...  
Keyword(s):  
Solar Radiation ◽  
Air Temperature ◽  
Arid Regions ◽  
Radiation Flux ◽  
Cooling Effect ◽  
Plastic Film ◽  
Solar Radiation Flux ◽  
Slaked Lime ◽  
Radiation Transmission

Shading greenhouses in a hot and sunny climate is essential to reduce the inside greenhouse air temperature. However, the type and location of nets need to be addressed properly to determine the shading method that provides a better cooling effect on the greenhouse air. This study was conducted to evaluate the effects of five different shading methods on greenhouse microclimates, and to investigate the cooling potential of each method. Four greenhouse models covered with 200-µm thick plastic film were used for the study: one was kept as control (C), one was whitened with slaked lime (L), and two were shaded with white and black nets (50% shading factor) deployed simultaneously at two locations, in contact (WC, BC) and at 20-cm distance from the cladding film (WD, BD). The microclimatic parameters were measured inside and outside the greenhouse models, and the cooling potential (CP) was predicted for each shading method. The results showed that the black net at 20-cm distance (BD) is desirable as it provides high CP with a reasonable solar radiation transmission. The maximum CP was estimated as 8.5 °C, 8 °C, 6 °C, 3.2 °C, and 2.1 °C for L, BD, BC, WD, and WC, respectively. Shading with white nets is not recommended because their cooling potential is very low. Based on these results, we developed correlations for predicting the CP for each shading method as a function of the transmitted solar radiation flux (Si). These correlations depend on Si. Accordingly, they can be used for small greenhouses, whitewashed with a slaked lime of any concentration, or shaded with a black net having any shading factor.

scholarly journals Marine and continental aerosol effects on the upwelling solar radiation flux in Southern Portugal during the ACE-2 experiment

2009 ◽  
Vol 46 (2) ◽  
Author(s):  
C. Tomasi ◽  
V. Vitale ◽  
A. Lupi ◽  
A. Cacciari ◽  
S. Marani ◽  
...  
Keyword(s):  
Solar Radiation ◽  
Radiation Flux ◽  
Solar Radiation Flux ◽  
Southern Portugal ◽  
Aerosol Effects

Heat Efficiency of Trough Solar Vacuum Receiver

2014 ◽  
Vol 521 ◽  
pp. 23-27
Author(s):  
Jun Ming Liang ◽  
Jian Feng Lu ◽  
Jing Ding ◽  
Jian Ping Yang
Keyword(s):  
Heat Transfer ◽  
Solar Radiation ◽  
Heat Loss ◽  
Wall Temperature ◽  
Radiation Flux ◽  
Heat Transfer Model ◽  
Transfer Model ◽  
Parabolic Trough ◽  
Heat Efficiency ◽  
Solar Radiation Flux

The heat loss and thermal performance of solar parabolic trough vacuum receiver were experimentally measured and analyzed by heat transfer model. According to the present experiments, the heat loss of solar parabolic trough vacuum receiver has good agreement with the heat loss of vacuum receiver from Solel company. As the wall temperature increase from 108°C to 158°C, the heat loss of solar parabolic trough vacuum receiver remarkably increases from 35 Wm-2to 57 Wm-2. The heat transfer model of parabolic trough solar receiver is then theoretically investigated due to the energy balances between the heat transfer fluid, absorber tube, glass envelope and surroundings. When solar radiation flux is constant, the heat efficiency of solar parabolic trough system decreases with the wall temperature and oil temperature. When solar radiation flux or solar concentration ratio increases, the heat efficiency of solar parabolic trough system increases.

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