D.G. Harris Samuel

Experimental investigation of a semi circular trough solar water heater

This paper studies the experimental analysis of a semi circular trough absorber solar water heater with baffles for improving the outlet water temperature. To increase the contact time of water with solar radiation and decreasing the flow rate of water baffles are kept in the absorber at a distance of 0.1 m. Studies are conducted for different flow rates of water in the absorber and flow rates increased by 2, 4, 8 and 16 times the base value of 0.133 kg/min. Results show that there is an increase in the outlet water temperature by 66.5 and 50°C with respect to inlet temperature during summer and winter, respectively, with an average inlet temperature of 34°C at minimum mass flow. The maximum water temperature during summer and winter conditions are found as 65 and 60°C respectively. Also, results show that the percentage increase in temperature of outlet water and average water temperature depends on solar intensity.

Geometrical variations in solar stills for improving the fresh water yield—A review

AbstractWater consumption by humanity is one of the major yardsticks to assess its civilization. Humans depend on groundwater sources for drinking. Some of these underground water sources cannot be used for drinking due to pollution. To solve the issues related to drinking water, several methods are employed, and a promising one is solar desalination. This paper communicates a review of different geometrical shapes of solar still. The present study concludes that the geometry in the solar still significantly influences the yield of fresh water.

Theoretical analysis of a triangular pyramid solar still integrated to an inclined solar still with baffles

Abstract This paper presents the theoretical analysis of a triangular pyramid solar still integrated to an inclined solar still with baffles. The performance of the solar still depends on water mass inside the basin. The yield of triangular pyramid solar still is increased by integrating it to an inclined solar still with baffles. Analytically, the water mass inside the basin is increased from 20 to 100 kg. Theoretical results show that the increase in water mass decreases the yield from 6% to 46% during the daytime, whereas due to thermal energy storage at higher mass, the yield during the nighttime increases from 46% to 86% with integration. Similarly, a triangular pyramid solar still is theoretically analysed for its performance.