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<p>A flat plate solar collector is an important device that makes it easier to use solar energy directly for water heating in both residential and commercial settings. Flat plate solar collectors (FPSC) currently in use have stationary and relatively poor efficiency. Additional research is required to increase the effectiveness of FPSC by introducing creative design. To bridge the gap, the work that is being presented is an experimental study of a novel design and fabrication technique that addresses the examination of the effectiveness of flat plate solar collectors. A major alternative for achieving a notable impact on thermal efficiency is always to modify the design of the solar collector. In this work the effectiveness of flat plate solar collectors (FPSCs) has been investigated using wavy riser tubes with pitches of 10, 20, and 40&#xa0;mm and Reynolds numbers varying from 5500 to 14,500. The Nusselt number increases by 6.97% and 16.9% in comparison to plain tubes at a Reynolds number of 5500 and 14,500 for the 40&#xa0;mm pitch, respectively. The Nusselt number increases by 16.27% at a Reynolds number of 5500 and by 31.46% at a Reynolds number of 14,500 for the 10&#xa0;mm pitch. Moreover, the basic tube collector’s efficiency rose to 75% at a Reynolds number of 14,500 and a pitch of 40&#xa0;mm.</p>

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Performance Analysis of Wavy Riser Tubes in Solar Plate Collectors

  • 期刊论文

  • 发表日期：

    2025年6月24日

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  • Lakshmikant Shivanayak,
  • Gowreesh Subramanya S

摘要

A flat plate solar collector is an important device that makes it easier to use solar energy directly for water heating in both residential and commercial settings. Flat plate solar collectors (FPSC) currently in use have stationary and relatively poor efficiency. Additional research is required to increase the effectiveness of FPSC by introducing creative design. To bridge the gap, the work that is being presented is an experimental study of a novel design and fabrication technique that addresses the examination of the effectiveness of flat plate solar collectors. A major alternative for achieving a notable impact on thermal efficiency is always to modify the design of the solar collector. In this work the effectiveness of flat plate solar collectors (FPSCs) has been investigated using wavy riser tubes with pitches of 10, 20, and 40 mm and Reynolds numbers varying from 5500 to 14,500. The Nusselt number increases by 6.97% and 16.9% in comparison to plain tubes at a Reynolds number of 5500 and 14,500 for the 40 mm pitch, respectively. The Nusselt number increases by 16.27% at a Reynolds number of 5500 and by 31.46% at a Reynolds number of 14,500 for the 10 mm pitch. Moreover, the basic tube collector’s efficiency rose to 75% at a Reynolds number of 14,500 and a pitch of 40 mm.