Experimental Investigation on Performance of silver Nanofliud in Absorber/Receiver of Parabolic trough collector

Abstract

This experimental investigation presents synthesis and characterizations of silver Nanoparticle. This study also deals with improvement in performance of absorber/Receiver using silver nanoparticle dispersed in DI water (De-Ionized water).The silver nanoparticle suspended in conventional fluid have superior heat transfer capabilities .The absorber of parabolic trough collector is tested for heat input ranging from 50 W/²-600 W/m² in four steps which is suitable for removing heat from solar system, process industries, power plants, automobile systems marine systems etc. The effect of various operational limits and test parameters such as heat input, volume fraction, fluid temperature, heat transfer coefficient are experimentally investigated. The silver nanoparticle is tested for volume concentration in the range of 0≤ Ф≤0.1 %, 500 ≤Re ≤6000, experimentally with average silver nanapartice diameter 10nm-400nm. The Characterizations of silver nanoparticle is carried out using TEM, UV and SEM methodology for required sample of silver nanoparticle. The experimental results are evaluated in terms of performance matrices by direct measurements of fluid temperature and surface temperature in the absorber. A substantial reduction in thermal resistance of 23.152% observed for 0.00011% concentration of silver nanoparticle. The Nussult number for absorber of parabolic trough collector with silver nanofliud varied from 1.25 to 2.10 times in comparison that of water.