Abstract
The performance of heat transfer in the solar radiation collector tube with a circular cross-section has an important potential for the promotion of solar thermal systems. This review paper discusses the parameters affecting heat transfer in these collector tubes, such as tube geometry, type of material, fluid flow, and environment. The focus of this review is on state-of-the-art methods for improving heat transfer including surface modifications, Nano fluids, and passive heat transfer enhancement strategies. Recent improvements in their material selection, nanotechnology, and new heat transfer fluids are discussed. The review seeks to offer significant references for future innovations and practical applications of those innovations in the field of solar thermal energy systems, and, thereby, provide a concise synthesis of the current state of the art in solar thermal technology. The research outcomes indicate that although considerable advancements have been realized in heat transfer performance optimization, continuous investigation into aspects like energy storage, hybrid configurations, and innovative coatings is essential for further enhancing the efficiency and cost-effectiveness of solar radiation collector tubes. .Key Words: Solar collector, heat transfer optimization, circular cross-section, heat transfer enhancement, nanofluids, thermal performance, solar energy.
Published Version
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