An analysis estimates insolation patterns in Kathmandu Valley, suggesting implications for solar energy use.
A limited set of observations of total global radiation at Tribhuwan International Airport has been used to estimate the parameters in a computer model of radiation input to sloping surfaces. The computer model separates direct, diffuse and circumsolar diffuse components, and derives clear day radiation estimates for horizontal and sloping surfaces using efficient vector methods. Direct and diffuse components are combined with sunshine-hour data to estimate average or mean monthly insolation on horizontal and sloping surfaces. The relative merits of extraterrestrial clear day, and average day radiation indices are discussed. Topographic data for the Kathmandu Valley were used to estimate average slope and azimuth at a grid of 394 points . These slope data were input to the computer model and mean monthly isopleths of clear day and average day insolation plotted and discussed.
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J.L Nayava (1980) studied this question.
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