Optimization study on solar receiver performance with rectangular tubular and wavy fins for parabolic dish collectors
摘要
The novel study investigates the thermal performance of solar receivers integrated with rectangular tubular heat exchangers topped with wavy fins. The solar receivers are designed for used in conjunction with a parabolic dish solar collector. The study focuses on enhancing heat absorption efficiency in solar receivers. This experimental analysis explores the effects of the receiver’s temperature distribution on overall heat gain and energy loss dynamics. The modified receiver, featuring specialized fins, facilitates an increased heat transfer rate by effectively channeling the absorbed solar flux to the heat transfer fluid. Results indicate a marked improvement in thermal efficiency, with the modified receiver achieving a peak efficiency of 58% compared to 51% for a standard plain receiver. A peak performance difference of around 500 W at midday showcases the effectiveness of the design modifications in enhancing solar energy capture and heat transfer. Additionally, the modified receiver demonstrates a reduced overall heat transfer coefficient of 271 W m−2 K−1, attributable to the optimized design. Peak surface temperatures reached by the modified receiver were observed at 152 and 178 °C compared with those of the plain receiver under varied test conditions. These findings suggest the modified receiver configuration can significantly enhance the efficiency of solar absorbers in concentrated solar power applications, presenting a viable pathway for sustainable energy solutions in high-temperature solar systems.