Generalized Models for Estimation of Diffuse Solar Radiation Based on Clearness Index

2020 ◽  
pp. 97-105
Author(s):  
Zhe Song ◽  
Zhigang Ren ◽  
Qinli Deng ◽  
Xin Chen
Keyword(s):  
Solar Radiation ◽  
Clearness Index ◽  
Diffuse Solar Radiation

Estimation of Diffuse Solar Radiation from Clearness Index for Multan, Southern Punjab, Pakistan

2016 ◽  
Vol 12 ◽  
pp. 441-444
Author(s):  
M. Tanweer ◽  
◽  
Firoz Ahmad ◽  
Zaheer Uddin ◽  
Saif Rehman ◽  
...  
Keyword(s):  
Solar Radiation ◽  
Clearness Index ◽  
Diffuse Solar Radiation

scholarly journals Analysis of ratio of global to extra-terrestrial radiation (clearness index) at some tropical locations in India

2017 ◽  
Vol 21 (3) ◽  
pp. 1379-1387
Author(s):  
Shanmugham Ravichandran ◽  
Jebamani Rathnaraj
Keyword(s):  
Solar Radiation ◽  
South India ◽  
Correlation Equations ◽  
Clearness Index ◽  
Diffuse Solar Radiation ◽  
Daily Average ◽  
Proposed Model ◽  
Performance Statistics ◽  
Term Data

An attempt has been made to analyze and evaluate the daily average clearness index (Hg/H0) in terms of daily average cloudiness index (Hd/H0) for three tropical locations in South India (Chennai, Trivandrum, and Visakapatnam). Long term data (15 years, 1993-2007) of measured daily average global and diffuse solar radiation for the locations have been used for this study. Two correlation equations (linear and polynomial) for each location have been developed for clearness index in terms of cloudiness index and found its validity. Performance statistics of the model has been done and applicability of the model is done by comparing the performance statistics with the existing models. It has been found that the proposed model has least error compared with the existing models.

scholarly journals Estimation of Global Solar Radiation on Horizontal Surfaces using Temperature-Based Model in Ilorin, Nigeria

2021 ◽  
Author(s):  
YAQUB BABATUNDE ADEDIJI ◽  
Ayobami Bamigboye ◽  
Joel Oluwaremilekun Aboderin ◽  
Onyeije Allison Lekwa ◽  
Emmanuel Onyedikachi Uzim
Keyword(s):  
Solar Radiation ◽  
Global Solar Radiation ◽  
Measuring System ◽  
Solar Irradiation ◽  
Clearness Index ◽  
Power Parameter ◽  
Diffuse Solar Radiation ◽  
Global Solar Irradiation ◽  
The Mean ◽  
Parameter Measuring

In this study, the Solar Irradiation received was estimated in Illorin, Kwara, Nigeria, using the maximum and minimum temperature measured by an Arduino-based solar power parameter measuring system. The Extraterrestrial, Global and Diffuse Solar Radiation were estimated monthly using the Hargreaves and Samani model. This model also required the daily temperature, clearness index, and extraterrestrial solar irradiation in its use alongside the maximum and minimum temperatures. In using this model, we resolved the graphs of the three types of Solar Irradiation over ten days. For the selected days, the estimated extraterrestrial solar irradiation varies from 10.41kWh/m2 to 10.47 kWh/m2, while the mean extraterrestrial solar irradiation is 10.44 kWh/m2. The estimated global solar irradiation varies from 4.42 kWh/m2 to 5.677kWh/m2, while the estimated mean global solar irradiation is 5.19kWh/m2 per day. The estimated diffuse solar irradiation varies from 3.46kWh/m2 to 5.48kWh/m2, while the mean diffuse solar irradiation is per day is 4.61kWh/m2.

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