K.R.S. Devan

TL;DR: In this article, two sky models, namely the isotropic model and the anisotropic model proposed by Hay and Davies, are used to calculate the diurnal profile of solar radiation intensity.

TL;DR: In this paper, the authors proposed a model to calculate instantaneous diffuse radiation directly from the extraterrestrial radiation using the ASHRAE model, which can be used to predict instantaneous, hourly and daily beam, diffuse, ground reflected, and total solar radiation.

TL;DR: In this paper, a new algorithm to simulate all solar components and optimum slopes, β opt, based on new models for direct normal beam and diffuse radiation and an analytical model to predict β opt, developed at the University of Botswana is applied for complete study of solar conditions in Mozambique.

TL;DR: In this paper, a non-tracking, cylindrical solar concentrator with circular cross-section of radius R is presented, and the focal length of the concentrator oscillates between 0.5 R and 0 with decreasing amplitude as the rim angle increases from 0 to 90°.

TL;DR: In this article, a graphical method to measure average and instantaneous efficiencies of a solar concentrator used for heating and boiling liquids and a flat plate collector is presented, which is correct to within 5% of the efficiencies obtained from accurate measurements involving solar radiation data, the design parameters of collectors and the physical characteristics of materials used in the fabrication of collectors.