Scholarlink

<p>A flat-plate collector serves as an efficient device to reduce reliance on electrical energy, thereby lowering electricity costs. However, further advancements are required to improve its ability to convert solar radiation into usable thermal energy. To enhance heat transfer rates, passive techniques like conical vortex generators are utilized. An experimental study is carried out on a flat-plate solar water heater (FPSC) to evaluate its performance, focusing on the influence of key operational parameters such as absorber plate temperature, riser tube temperature, solar insolation, as well as energy and exergy efficiencies. The FPSC with a vortex generator (MFPSC) has the greatest hourly efficiency, 55.71%, in comparison to the FPSC without a vortex generator (48.57%). The daily energy efficiency of the MFPSC (41.04%) increases by 17.95% with the addition of a vortex generator, surpassing that of the CFPSC (34.92%). These experimental findings were subsequently used to validate three-dimensional CFD simulations performed in ANSYS Fluent 19.2. The outcomes for the outlet water temperature for the MFPSC also demonstrated satisfactory agreement, with errors of 1.5% and 1.4% for the greatest and lowest temperatures, respectively. The simulation and experimental results for the MFPSC and CFPSC also showed good agreement, with maximum errors of 7.3% and 11.4%, respectively, in terms of energy efficiency.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Investigating the Impact of Conical Vortex Generators on Flat Plate Solar Water Heaters: A Combined Experimental and CFD Approach

  • 期刊论文

  • 发表日期：

    2025年11月3日

查看全文
  • Satyendra Ram,
  • A. K. Prasad,
  • Dulari Hansdah

摘要

A flat-plate collector serves as an efficient device to reduce reliance on electrical energy, thereby lowering electricity costs. However, further advancements are required to improve its ability to convert solar radiation into usable thermal energy. To enhance heat transfer rates, passive techniques like conical vortex generators are utilized. An experimental study is carried out on a flat-plate solar water heater (FPSC) to evaluate its performance, focusing on the influence of key operational parameters such as absorber plate temperature, riser tube temperature, solar insolation, as well as energy and exergy efficiencies. The FPSC with a vortex generator (MFPSC) has the greatest hourly efficiency, 55.71%, in comparison to the FPSC without a vortex generator (48.57%). The daily energy efficiency of the MFPSC (41.04%) increases by 17.95% with the addition of a vortex generator, surpassing that of the CFPSC (34.92%). These experimental findings were subsequently used to validate three-dimensional CFD simulations performed in ANSYS Fluent 19.2. The outcomes for the outlet water temperature for the MFPSC also demonstrated satisfactory agreement, with errors of 1.5% and 1.4% for the greatest and lowest temperatures, respectively. The simulation and experimental results for the MFPSC and CFPSC also showed good agreement, with maximum errors of 7.3% and 11.4%, respectively, in terms of energy efficiency.