Scholarlink

<p>To solve the issues of non-uniform heating, low heat transfer performance and high temperature in the absorber tube (AT) of parabolic trough receiver (PTR), a PTR with annular sector inserts (A-S-PTR) is proposed and its numerical study is carried out in detail. The effects of the annular sector’s parameters on the PTR’s performance are comprehensively investigated, and the optimal parameters of the annular sector are obtained by multi-objective optimization based on the NSGA-II algorithm. The optimal parameter combination of the A-S-PTR are <i>α</i><sub>1opt</sub>=30.878°, <i>β</i><sub>1opt</sub>=49.636°, <i>r</i><sub>1opt</sub>=7.47 mm and <i>θ</i><sub>1opt</sub>=17.449°. Lastly, the performances of the optimal A-S-PTR under various operational scenarios are analyzed in detail. Results indicate that the flow field structure of the A-S-PTR is similar to that of the PTR optimized by exergy destruction minimization, specifically, two pairs of longitudinal vortices that are symmetrically distributed in the AT’s lower part. The annular sector can guide the high-temperature fluid near the AT to mix with the fluid in the core region, thus accelerating heat transfer. As a result, when compared with the conventional PTR, the maximum wall temperature of the AT’s inner wall and the heat loss for the optimal A-S-PTR are reduced by 23.7% and 72.6%, respectively, and the thermal efficiency is increased by 3.25%. This research provides guidelines for the designs of more effective PTRs.</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

Performance analysis and heat transfer multi-objective optimization of parabolic trough receiver with annular sector inserts

  • 期刊论文

  • 发表日期：

    2025年4月16日

查看全文
  • Haiwen Ma,
  • Peng Liu,
  • Lu Huang,
  • Yanlin Ge,
  • Lingen Chen

摘要

To solve the issues of non-uniform heating, low heat transfer performance and high temperature in the absorber tube (AT) of parabolic trough receiver (PTR), a PTR with annular sector inserts (A-S-PTR) is proposed and its numerical study is carried out in detail. The effects of the annular sector’s parameters on the PTR’s performance are comprehensively investigated, and the optimal parameters of the annular sector are obtained by multi-objective optimization based on the NSGA-II algorithm. The optimal parameter combination of the A-S-PTR are α1opt=30.878°, β1opt=49.636°, r1opt=7.47 mm and θ1opt=17.449°. Lastly, the performances of the optimal A-S-PTR under various operational scenarios are analyzed in detail. Results indicate that the flow field structure of the A-S-PTR is similar to that of the PTR optimized by exergy destruction minimization, specifically, two pairs of longitudinal vortices that are symmetrically distributed in the AT’s lower part. The annular sector can guide the high-temperature fluid near the AT to mix with the fluid in the core region, thus accelerating heat transfer. As a result, when compared with the conventional PTR, the maximum wall temperature of the AT’s inner wall and the heat loss for the optimal A-S-PTR are reduced by 23.7% and 72.6%, respectively, and the thermal efficiency is increased by 3.25%. This research provides guidelines for the designs of more effective PTRs.