Prediction of Direct and Diffuse Solar Radiation on Pokhara, Nepal

Authors

  • Prakash Man Shrestha Tribhuvan University
  • Narayan Prasad Chapagain Tribhuvan University
  • Indra Bahadur Karki Tribhuvan University
  • Khem Narayan Poudyal Tribhuvan University

DOI:

https://doi.org/10.3126/batuk.v9i2.57032

Keywords:

aerosol, atmospheric transmittance, diffuse, direct radiation, solar radiation

Abstract

The measurement of direct and diffuse solar radiation is not easily possible because instruments are quite expensive. The main objective of this study was to predict direct solar radiation (IB) and diffuse solar radiation (ID) on Pokhara (28.186643o N, 83.97518o E, 800 m asl) for a period of one year (2017). Daily data of spectral Aerosol optical depth (AOD) and total ozone column are obtained from NASA website. The maximum value of direct solar radiation and diffuse solar radiation values were found 932.9 ± 65.9 W/m2 in January and 363.0 ± 87.9 W/m2 in February respectively. The minimum value of direct solar radiation and diffuse solar radiation values were found 692.8 ±142.0 W/m2 in April and 107.7 ± 20.4 W/m2 in July respectively. The diffuse solar radiation changes with season. The annual average of direct solar radiation and diffuse solar radiation are found 808.1± 133.7 W/m2 and 220.8 ± 102.8 W/m2 and respectively. The results of this research work will help further identification, impact and analysis of solar radiation in different locations in Nepal with the same geographic conditions. 

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Author Biographies

Prakash Man Shrestha, Tribhuvan University

Lecturer

Narayan Prasad Chapagain, Tribhuvan University

Lecturer

Indra Bahadur Karki, Tribhuvan University

Lecturer

Khem Narayan Poudyal, Tribhuvan University

Lecturer

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Published

2023-07-28

How to Cite

Shrestha, P. M., Chapagain, N. P., Karki, I. B., & Poudyal, K. N. (2023). Prediction of Direct and Diffuse Solar Radiation on Pokhara, Nepal. The Batuk, 9(2), 51–62. https://doi.org/10.3126/batuk.v9i2.57032

Issue

Section

Part II: Humanities and Social Sciences