▎ 摘　　要

NOVELTY - The method involves utilizing reduced graphene oxide as nano-fluid on parabolic trough collector for solar hot water generation at low cost. The sample solution/water is prepared by ultrasonic bath with mass fraction of 0.5-1.0%. The working fluid is provided with higher thermal efficiency. The higher thermal conductivity of copper receiver tube is adopted to enhance heat transfer fluids. The maximum fluid outlet temperature is achieved in good sunny day's up to 70-85 degrees C. USE - Method for utilizing reduced graphene oxide as nano-fluid on parabolic trough collector for solar hot water, for use in medium-scale applications such as industrial processing, food processing technology and domestic usage. ADVANTAGE - The thermal performance of present work is improved and the optical efficiency and thermal efficiency compared to other type of solar collector with incorporated of nano-fluid are improved. The solar collectors are provided for medium-scale applications such as industrial processing, food processing technology and domestic usage. DESCRIPTION OF DRAWING(S) - The drawing shows a block diagram of a device for utilizing reduced graphene oxide as nano-fluid on parabolic trough collector for solar hot water. Battery (1001) Ultrasonic batch (1002) Nano-poweder (1003) Magnetic stirrer (1006) Sample solution or water (1007)