Solar Energy Potential in Nepal and Global Context

Adhikari, Krishna Raj; Gurung, Shekhar; Bhattarai, Binod

doi:10.3126/jie.v9i1.10675

Cited by 22 publications

(20 citation statements)

References 8 publications

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“…The estimated energy saving obtainable with the use of RR materials is comparable to the values of anthropogenic heat emissions expressed in MJ/m 2 ·day for residential areas in tropical cities, as estimated [52].…”

Section: Resultssupporting

confidence: 55%

“…Adhikari et al [52] estimates the temporal variability of the anthropogenic heat flux density by separately considering the major sources of waste heat in urban environments, which include heat release from vehicular traffic, buildings, and human metabolism, respectively. The calculated anthropogenic heat flux density varies as a function of weekdays and study area, and ranges from 1.1 MJ/m 2 ·day to 7.5 MJ/m 2 day, which has a comparable order of magnitude of the hypothesized benefit above.…”

Section: Resultsmentioning

confidence: 99%

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Experimental Analysis of the Effect of Geometry and Façade Materials on Urban District’s Equivalent Albedo

et al. 2017

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Urban Heat Island (UHI) is influenced by urban form, geometry, and the properties of surfaces. Retroreflective (RR) materials have been proposed as a countermeasure to UHI, thanks to their optical property of reflecting most of the incident solar energy back towards the same direction. In this paper, the effect of RR materials on urban districts was investigated. They were applied on building façades of urban districts with different urban forms and orientations. To this aim, an experimental model resembling urban districts with different geometries was built and RR materials on vertical surfaces were tested and compared to conventional construction materials with similar global reflectance. The trend of the instantaneous albedo was monitored during the day and a new parameter called "equivalent albedo" was used to demonstrate the effectiveness of the RR materials. The comparative analysis shows that the RR façades lead to an increase of the equivalent albedo for all of the investigated urban patterns. For a block pattern, the equivalent albedo increase is equal to 3%, while for canyon patterns it is equal to 7%. Results of energy evaluations show that the energy savings obtainable with the use of RR materials is comparable to the values of anthropogenic heat emissions in residential areas.

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Section: Resultssupporting

confidence: 55%

Section: Resultsmentioning

confidence: 99%

Experimental Analysis of the Effect of Geometry and Façade Materials on Urban District’s Equivalent Albedo

et al. 2017

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“…During that period, the earth received lesser solar radiation as compared to the premonsoon period. It was primarily caused by least sunshine hour, high precipitation, and cloud [29]. However, air temperature remains constant during those periods.…”

Section: Resultsmentioning

confidence: 99%

Solar Radiation, Air Temperature, Relative Humidity, and Dew Point Study: Damak, Jhapa, Nepal

Shrestha¹,

Thapa

Gautam

2019

International Journal of Photoenergy

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Monitoring and prediction of the climatic phenomenon are of keen interest in recent years because it has great influence in the lives of people and their environments. This paper is aimed at reporting the variation of daily and monthly solar radiation, air temperature, relative humidity (RH), and dew point over the year of 2013 based on the data obtained from the weather station situated in Damak, Nepal. The result shows that on a clear day, the variation of solar radiation and RH follows the Gaussian function in which the first one has an upward trend and the second one has a downward trend. However, the change in air temperature satisfies the sine function. The dew point temperature shows somewhat complex behavior. Monthly variation of solar radiation, air temperature, and dew point shows a similar pattern, lower at winter and higher in summer. Maximum solar radiation (331 Wm-2) was observed in May and minimum (170 Wm-2) in December. Air temperature and dew point had the highest value from June to September nearly at 29°C and 25°C, respectively. The lowest value of the relative humidity (55.4%) in April indicates the driest month of the year. Dew point was also calculated from the actual readings of air temperature and relative humidity using the online calculator, and the calculated value showed the exact linear relationship with the observed value. The diurnal and nocturnal temperature of each month showed that temperature difference was relatively lower (less than 10°C) at summer rather than in winter.

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“…With the establishment of Alternative Energy Promotion Center (AEPC) in 1996 [27], development in mini and micro hydropower, solar PV and wind generation has taken sudden pace. Notably, during the electricity crisis that begins in 2006, when Nepal suffered rolling blackout up to 16 hours in a single day at the dry season, people have shifted their trust to Solar PV and MHP to fulfil their electricity demands [28]. Since then, several programs have been launched, and different companies have invested in promoting RES.…”

Section: Status Of Mini Grid In Rural Nepal and Other South Asianmentioning

confidence: 99%

Status of Micro/Mini-Grid Systems in a Himalayan Nation: A Comprehensive Review

et al. 2020

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Nepal is a Himalayan country with its 83% of its geography being composed of hills and mountains. Around 22% of the Nepalese population is not receiving electricity through the national power utility and is forced to identify alternative approaches to electrification. The Micro/Mini-Grid (MG) system is one of the promising approaches in terms of cost, reliability and performance for rural electrification, where electrification through national power utility is not techno-economically feasible. However, various issues must be identified and considered during the implementation of MGs in a rural community. In this paper, numerous technical, social and management issues are identified and discussed relating to the implementation and operation of reliable and stable MGs in the Himalayas. To our knowledge, this is the first scientific work that presents a comprehensive review of Himalayan MGs and their associated elements. This article reviews the available research articles, project documents, and Government reports on MG development, from which a clear roadmap is constructed. From the comprehensive study, it is observed that the existing MGs are not adequately designed for the specific area, considering the local resources and local information. Based on the identified issues, some practical and efficient recommendations have been made, so that future MG projects will address the possible problems during the design and implementation phase.

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Solar Energy Potential in Nepal and Global Context

Cited by 22 publications

References 8 publications

Experimental Analysis of the Effect of Geometry and Façade Materials on Urban District’s Equivalent Albedo

Experimental Analysis of the Effect of Geometry and Façade Materials on Urban District’s Equivalent Albedo

Solar Radiation, Air Temperature, Relative Humidity, and Dew Point Study: Damak, Jhapa, Nepal

Status of Micro/Mini-Grid Systems in a Himalayan Nation: A Comprehensive Review

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