Solar Energy Potential in Kathmandu Valley, Nepal

Regmi, Santosh; Adhikary, Sunil

doi:10.3126/jhm.v8i1.15576

Cited by 8 publications

(4 citation statements)

References 2 publications

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“…The variation of the air temperature and solar radiation is displayed in Figures 4(a) and 4(b). The research conducted by Regmi and Adhikary [26] and Poudyal et al [27] also reported the similar pattern of monthly variation of solar radiation in Kathmandu and Pokhara valley as we observed in Damak. In winter especially in January, February, November, and December, the sunshine hour was higher but the earth received the least solar radiation due to an oblique incident of the sunlight and optically thick low cloud [28]; as a result, the temperature was also low.…”

Section: Resultssupporting

confidence: 88%

“…The sunshine hour is an important factor to determine solar radiation and air temperature. In Kathmandu valley, the sunshine hour is higher (7 hours/day) in the 3 International Journal of Photoenergy winter, premonsoon, and postmonsoon season and least (5 hours/day) in the monsoon season [26]. The data of the Kathmandu valley represents the whole part of Nepal because it is situated in the middle part of Nepal.…”

Section: Resultsmentioning

confidence: 90%

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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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Section: Resultssupporting

confidence: 88%

Section: Resultsmentioning

confidence: 90%

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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“…After receiving ethical approval from Institutional Review Board, Institute of Medicine [Ref #295(6–11-E)], this cross-sectional observational study was performed between November 2015 – April 2016 and consisted of a total of 81 adult RTRs (> 18 y of age) out of the total 130 RTRs available at the commencement of the study (sampling percentage: 62.3%) following up in the renal transplant outpatient department (OPD) under Nephrology Unit of Department of Internal Medicine, Tribhuvan University Teaching Hospital, Kathmandu (Latitude 27 0 42′ 2.7684" N), Nepal. There is seasonal variation in the mean monthly sunshine duration in this city; Pre-monsoon and post-monsoon seasons have higher mean monthly sunshine duration (about 8 h/day) than summer (about 5 h/day) and winter season (about 7 h/day) [ 13 ].…”

Section: Methodsmentioning

confidence: 99%

Status of vitamin D and parameters of calcium homeostasis in renal transplant recipients in Nepal: a cross sectional study

et al. 2018

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BackgroundVitamin D, apart from being an important part of the “calcium-vitamin D-parathyroid hormone” endocrine axis, has diverse range of “non-calcemic” biological actions. A high prevalence of vitamin D deficiency has been observed in renal transplant recipients (RTRs) worldwide. This study aimed to determine the prevalence of hypovitaminosis D in Nepalese RTRs and interrelations between serum 25-hydroxyvitamin D [25(OH) D] and other biochemical parameters.MethodsA total of 80 adult RTRs visiting a university hospital were enrolled in this cross sectional study. Serum 25(OH) D and intact parathyroid hormone (iPTH) were measured using Enhanced Chemiluminiscent Immunoassay. The RTR population was categorized into recent transplant recipients (≤1 year) and long term recipients (> 1 year). The vitamin D status was defined as per NKF/KDOQI guidelines. SPSS version 20.0 was used to analyze the data. Appropriate statistical tests were applied to compare variables between groups and establish correlation. P < 0.05 was considered to be statistically significant.ResultsThe mean age of the recipients was 38.11 ± 11.47 years (68 males, 85.0%). Chronic glomerulonephritis was the leading cause of CKD. The two RTR groups (recent and long term) didn’t differ in demographic and biochemical characteristics. 83.75% of the recipients had PTH levels above the upper limit of the recommended range for their stage of CKD. 57.5% had hypocalcemia and none of the recipients had hypercalcemia. The median serum 25(OH) D was 24.15 ng/ml (8.00–51.50 ng/ml). Only 27.5% had sufficient vitamin D status whereas 53.8% were vitamin D insufficient and 18.8% were vitamin D deficient, the distribution almost comparable in the 2 transplant group. The serum 25(OH) D was not significantly affected by the time post-transplant, gender and sunlight avoidance. There was a significant negative correlation between serum 25(OH) D and iPTH (Pearson’s r = − 0.35, P = 0.001), but not so with the graft function.ConclusionThere is a high prevalence of vitamin D insufficiency in RTRs. The deficiency status is not corrected despite of nutritional improvement and normalization of GFR post-transplantation and likely exacerbates secondary hyperparathyroidism. Vitamin D supplementation coupled with sensible sun exposure could be important strategies in optimization of the vitamin D status in this population.

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“…Conventional sources of energy like the use of firewood, coal, fossil fuels, and cow dung, usually release more carbon dioxide (CO2), which is a greenhouse gas, into the atmosphere, thus leading to environmental pollution, which in turn, propels the global warming phenomenon. These prevailing problems have urged scholars and researchers to develop clean and renewable sources of energy as an alternative to fossil fuels [3]. Notably, within the context of the Nepalese region, there is a need for such sources of energy in order to attain sustainable development goals as it continues to advance in the Himalayan region.…”

Section: Introductionmentioning

confidence: 99%

Solar Energy Potential in Nepal: A Meta-Analytic Review

Karki¹

2021

IJSRP

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Globally there is an energy disparity that emanates from supply shortages of clean energy that is adequate to the growing population. Clean energy is vital for poverty eradication through social-economic development in a country. Nepal has not been an exemption in an energy crisis, despite the potential for generating, 2,100 MW of solar power and 3000 MW wind power which are eco-friendly and renewable sources of energy. Nepal, as a country, is a less developed economy, with more than 80% of the population residing in rural areas. This rural population depends on nonrenewable energy sources, like traditional stoves and fuel woods, which are detrimental to the environment. Besides, fossil fuels in the country are imported, creating an economic burden on the country. Nepal has the potential to utilize solar energy as a sustainable energy source. However, this potential requires mitigation of anticipated challenges from the supply side. This research project will seek to develop recommendations for viable solar energy supply technologies by assessing and identifying possible limitations in the energy supply side; this includes analysis of solar concentrations technologies that affect the solar power output and reliability. The final report will be instrumental in developing solar thermal concentrations systems that are effective, efficient and reliable.

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Solar Energy Potential in Kathmandu Valley, Nepal

Cited by 8 publications

References 2 publications

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

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

Status of vitamin D and parameters of calcium homeostasis in renal transplant recipients in Nepal: a cross sectional study

Solar Energy Potential in Nepal: A Meta-Analytic Review

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