Effect of specular high-level clouds on solar radiation fluxes according to the data of the lidar-actinometric experiment

Author(s):  
Ignatii V. Samokhvalov ◽  
Ilia D. Bryukhanov ◽  
Sergey V. Zuev ◽  
Ivan V. Zhivotenyuk
2021 ◽  
Vol 34 (4) ◽  
pp. 327-334
Author(s):  
I. D. Bryukhanov ◽  
S. V. Zuev ◽  
I. V. Samokhvalov

1998 ◽  
Vol 103 (E10) ◽  
pp. 22929-22977 ◽  
Author(s):  
L. A. Sromovsky ◽  
A. D. Collard ◽  
P. M. Fry ◽  
G. S. Orton ◽  
M. T. Lemmon ◽  
...  

2015 ◽  
Vol 5 ◽  
pp. A33 ◽  
Author(s):  
Álvaro Vicente-Retortillo ◽  
Francisco Valero ◽  
Luis Vázquez ◽  
Germán M. Martínez

The Batuk ◽  
2020 ◽  
Vol 6 (1) ◽  
pp. 72-80
Author(s):  
Prakash M. Shrestha ◽  
Khem N. Poudyal ◽  
Narayan P. Chapagain ◽  
Indra B. Karki

Solar radiation data are great significance for solar energy systems. This study aimed to estimate monthly and seasonal average daily global solar radiation on a horizontal surface in Kathmandu (27.7oN, 85.5oE, 1350 masl), Nepal, by using CMP6 pyranometer in 2012. The influence of the global solar irradiation from different physical as well as meteorological parameters was analyzed. Besides this, the research highlighted that there is high level of fluctuation of the measured value of global solar irradiance due to local weather conditions. As a result of this measurement, the maximum, minimum monthly and yearly mean solar radiation values were (21.32 ± 4.14) MJ/m2/day in May,(10.93 ± 2.03) MJ/m2/day in January and (16.68 ± 4.60)MJ/m2/day found respectively. Annual average of clearness index, maximum temperature, minimum temperature, relative sunshine hour, air mass are 0.51 ± 0.12, (26.23 ± 4.96)oC, (12.38 ± 6.83)oC, 0.57 ± 0.165 and 1.54 ± 0.42 respectively. There is positive correlation of maximum temperature and negative correlation of air mass with global solar radiation.


2021 ◽  
Vol 39 (2) ◽  
pp. 486-492
Author(s):  
Periyasamy Rangaraju ◽  
Santhia Sivakumar

Varying salt density solar pond is a method that is best suited to absorb and store solar energy. This examination includes the test enhancement of the permeable and non-permeable sunlight-based ponds dependent on its exhibition in different conditions. This experiment was done in Salem, Tamil Nadu, India. This particular topographical area has a high level of solar radiation and is a tropical district. Readings for a period of 30 days were taken; the temperature circulation, a measure of heat energy stored and concentration of salt density was assessed. For examination, two comparable solar ponds of volume 0.02 m3 and a height of 0.32 m was built. Black granite pieces, broken glass pieces, and welding spatter were used as a permeable medium in the lower convective zone (LCZ) in one of the two solar ponds. The temperatures of the permeable solar pond and non-permeable solar pond reached the highest values of 42.3℃ and 40.6℃ respectively. The solar pond with a permeable medium demonstrated an increase of 4.18% in temperature. The difference in amounts of stored thermal energy is 4.54 kJ. From the obtained parameters, the optimization is done and the permeable medium solar pond is found to store more amount of heat energy than the non- permeable solar pond. For the optimization of the mixed medium, criterion parameter βelk has been acquired in the solar pond.


1951 ◽  
Vol 4 (1) ◽  
pp. 36 ◽  
Author(s):  
JP Wild

Observations are described of the spectrum of " enhanced radiation" from the Sun (i.e. the radio-frequency radiation which maintains a high but variable level for periods of hours' or days' duration) in the frequency range 70-130 Mc/s. This radiation is known to be received from the direction of sunspots and to show circular polarization. For the purpose of presenting results, two components are recognized, viz. a background continuum which varies gradually with time and frequency, and short-lived, narrow-band bursts (" storm bursts "). The behaviour of the two components, and the relation between them during periods of high level (" noise storms ") are described. A detailed analysis is given of the properties of recorded storm bursts. The distribution of recorded bursts with frequency was found to be markedly non- uniform, e.g. a pronounced minimum at 89 Mc/s. was present. The possibility that the background continuum is due to the resultant of a large number of bursts is discussed.


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