An experimental analysis of the effect of graphene oxide nanoplatelets / deionized water on the direct absorption solar collector performance

Since solar energy is known as one of the most important and renewable energy resources, increasing the absorption of solar energy plays significant roles in the effectiveness of thermal collector systems. This research aims to analyze empirically the function of direct absorption solar collectors with the use of graphene oxide nanoplatelets /deionized water. Weight percent’s of the graphene oxide in the deionized water are selected 0.005, 0.015 and 0.045. Collectors have been examined according to EN 12975-2 standard in various intern fluid temperature and with flow rates of 0.0075, 0.015 and 0.0225. Results show by increasing the weight percent of Nanofluid, collector’s performance is increased. Moreover, the maximum efficiencies of collector with the flow rate of 0.045 are determined 63.28%, 72.59% and 75.07%. This amount for the normal fluid is 58.25%.