Scholarlink

<p>This experimental study examines the thermo-hydraulic performance of a parabolic trough solar collector using water-based Fe₃O₄ nanofluids with twisted tape inserts under simulated solar flux. Fe₃O₄ nanofluids with volume fractions of ϕ = 0.01–0.06 were circulated through a copper absorber tube equipped with twisted tapes of twist ratios (H/D) = 2.8, 3.9, and 5.4 over a Reynolds number range of 3,000–25,000. Compared with plain water, nanofluids produced higher inlet–outlet temperature differences, increasing from about 6–8&#xa0;K to approximately 37–38&#xa0;K when combined with twisted tape inserts at lower Reynolds number. The Nusselt number increased markedly with Reynolds number and nanoparticle concentration, reaching approximately 1–3 times that of plain water for combined nanofluid–twisted tape configurations. The friction factor increased by about 2–3.0 times due to enhanced swirl flow and higher effective viscosity. Despite this hydraulic penalty, the Performance Evaluation Criterion remained greater than unity for all cases, with PEC values generally ranging from about 1 to 2.3, confirming an overall thermo-hydraulic advantage.</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

Experimental investigation of ferrofluid-based parabolic trough solar collector employing twisted tape under variable flow conditions

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年2月24日

查看全文
  • Janardhan K. Bhor,
  • Jayant H. Bhangale

摘要

This experimental study examines the thermo-hydraulic performance of a parabolic trough solar collector using water-based Fe₃O₄ nanofluids with twisted tape inserts under simulated solar flux. Fe₃O₄ nanofluids with volume fractions of ϕ = 0.01–0.06 were circulated through a copper absorber tube equipped with twisted tapes of twist ratios (H/D) = 2.8, 3.9, and 5.4 over a Reynolds number range of 3,000–25,000. Compared with plain water, nanofluids produced higher inlet–outlet temperature differences, increasing from about 6–8 K to approximately 37–38 K when combined with twisted tape inserts at lower Reynolds number. The Nusselt number increased markedly with Reynolds number and nanoparticle concentration, reaching approximately 1–3 times that of plain water for combined nanofluid–twisted tape configurations. The friction factor increased by about 2–3.0 times due to enhanced swirl flow and higher effective viscosity. Despite this hydraulic penalty, the Performance Evaluation Criterion remained greater than unity for all cases, with PEC values generally ranging from about 1 to 2.3, confirming an overall thermo-hydraulic advantage.