Solar Radiation Potential at Four Sites of Nepal

Pondyal, Khem N; Bhattarai, Binod; Sapkota, Balkrishna; Kjeldstad, Berit

doi:10.3126/jie.v8i3.5944

Cited by 26 publications

(32 citation statements)

References 3 publications

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“…[3]. Similarly the value, based on for Biratnagar (9.13MJ/m 2 day), Lukla (15.4313MJ/m 2 day), Kathmandu (13.7113MJ/m 2 day) and Pokhara (14.3213MJ/m 2 day) provided by [14] are also different from the value measured and presented by this study.…”

Section: Theorycontrasting

confidence: 81%

“…This obviously shows that fine particulate level in the Valley has increased at a very high rate. This may be associated with road traffic and various types of construction works [14].…”

Section: The Study Sitesmentioning

confidence: 99%

“…The data are compared with [14], [3] and with global context. The observed data presented in Table 1 ) in September for Biratnagar, Lukla, Kathmandu, Pokhara, Jumla and Simikot respectively.…”

Section: Theorymentioning

confidence: 99%

“…The global solar insolations of these locations were compared to each other and the derived national average solar radiation has been compared with global context as well. Moreover, ground based measured data are compared with earlier data presented by [3] and [14].…”

Section: Introductionmentioning

confidence: 99%

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Solar Energy Potential in Nepal and Global Context

Adhikari¹,

Gurung

Bhattarai

2014

J. Inst. Engineering

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Solar radiation is the best option and cost effective energy resources of this world from 21 st century onwards. In this study monthly, seasonal and annual variation of global solar insolation at Biratnagar, Lukla, Kathmandu, Pokhara, of the year 2007 to 2012, Jumla of the year 2011 to 2012 and Simikot 2011/2012 were carried out. The study has shown the variation of global solar insolation with month, season, year, atmospheric condition, and altitude of the site concerned. The maximum value of monthly, seasonal, and yearly global solar insolation was reported at Jumla whereas the minimum monthly, seasonal, and yearly global solar insolation were observed at Kathmandu. From the observation the abundant solar irradiation in Nepal shows encouraging atmosphere for solar farming venture in near future relating to energy management for Nepal.

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Section: Theorycontrasting

confidence: 81%

“…This obviously shows that fine particulate level in the Valley has increased at a very high rate. This may be associated with road traffic and various types of construction works [14].…”

Section: The Study Sitesmentioning

confidence: 99%

Section: Theorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Solar Energy Potential in Nepal and Global Context

Adhikari¹,

Gurung

Bhattarai

2014

J. Inst. Engineering

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“…Clouds is the major cause of fluctuation in the solar radiation and sunshine hours on the ground surface. The variation, however, is not due to the angle of incidence of the sun's rays with ground surface and its azimuth [10].…”

Section: Introductionmentioning

confidence: 94%

Estimation of Global Solar Radiation Using Clearness Index and Cloud Transmittance Factor at Trans-Himalayan Region in Nepal

Poudyal¹,

Bhattarai²,

Sapkota³

et al. 2012

EPE

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This paper presents the global solar radiation (GSR) and cloud transmittance factor (cf) measured at the horizontal surface over a period of one year from 2009 to 2010 using CMP6 Pyranometer and NILUUV Irradiance Meter at Lukla (Latitude 26.69˚N, Longitude 86.73˚E and Altitude 2850 m) in the foothills of the Mt Everest (8850 m high). Monthly and seasonal variations of global solar radiation as well as correlation between clearness index and cloud transmittance factor at Lukla are presented. The annual average daily global solar radiation is about 3.83 kWh/sq·m/day which is sufficient to promote solar active and passive energy technology at high mountain terrain where there is no other viable alternative sources of energy. The maximum and minimum global solar radiation of 5.33 and 2.08 kWh/sq·m/day is recorded in April and September 2010 respectively. The seasonal variation of solar energy is about 2.87 kWh/sq·m/day and 4.83 kWh/sq·m/day in summer and spring respectively which is not in line with the general trend. The coefficient of determination (R 2 ) between cloud transmittance factor (cf) and clearness factor (K) is found to be 0.97. This novel result can be utilized to estimate the global solar radiation at the horizontal surface where K and cf are available.

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