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Srinivasa K Reddy

Optical analysis of solar parabolic trough collector with flat concentrating photovoltaic receiver
01-01-2014, Kamnapure, Nikhilesh R., Srinivasa K Reddy
In this paper, an optical analysis of parabolic trough collector with flat concentrating photovoltaic receiver is carried out by utilizing non-uniform intensity distribution model of the solar disk. The optical system simulation tool ASAP is used to analyze the parabolic trough system with single axis tracking having a mirror aperture of 1m and length of 3m. The impact of random errors including slope error, apparent change in sun's width, tracking errors on the optical performance of trough system is carried out. The errors are assumed to follow Gaussian (normal) distribution and analyzed statistically. It is found that intercept factor increases with rim angle for given total error of 5, 10 and 20 mrad. Geometrical concentration ratio is varied to see the effect on the intercept factor and compared for various error values. The numerical results show that for De-focused performance (L = 0.1f) the local concentration ratio value is 23 for the 45° rim angle. Numerical results are compared with the analytical data available in the literature which show good agreement. © (2014) Trans Tech Publications, Switzerland.

Energy and environmental analysis of multi-effect active vertical solar desalination unit for Indian conditions
01-01-2018, Reddy, K. S., Sharon, H.
Environmental benefits and economic feasibility of evacuated multi-effect vertical solar desalination unit have been estimated for various coastal regions of India. Maximum annual average daily distillate yield and performance ratio of 29.43 kg/m2-d and 4.29 were recorded for Panaji. The unit was found to be capable of mitigating CO2, SO2 and NO emissions in the range of 74.74–137.65 tons, 730.53–989.70 kg and 225.75–404.27 kg, respectively, for considered east coast locations of India. Net CO2, SO2 and NO emission mitigation in the range of 115.01–149.36 tons, 872.07–1073.94 kg and 337.75–438.65 kg, respectively, was noticed for coastal regions in western part of India. Energy payback period of the unit was well below 1.5 yr for all the considered locations. Lowest distillate production cost of 0.79 INR/L and 0.73 INR/L was noticed for east and west coast region of India.