• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Heat and Mass Transfer >Performance analysis of a parabolic trough solar collector with non-uniform solar flux conditions
【24h】

Performance analysis of a parabolic trough solar collector with non-uniform solar flux conditions

机译：太阳光通量不均匀的抛物槽式太阳能集热器性能分析

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The improvement of the performances of the parabolic trough solar collector system (PTC) plays a vital role in the utilizations of solar energy. In this paper, a solar ray trace (SRT) method and the finite element method (FEM) based numerical simulation method is proposed to solve the complex problem coupled with fluid flow, heat transfer and thermal stress in a PTC system. The profile of the solar energy flux is calculated by the SRT method, and the effects of the key operating parameters on the performances of the receiver are numerically investigated. The distributions of the stress intensity and the thermal deformations of the receiver are numerically studied. Numerical simulation results indicate that the circumferential temperature difference (CTD) of the absorber decreases with the increases of inlet temperature and velocity of the heat transfer fluid (HTF) and increases with the increment of the direct normal irradiance (DNI). When the inlet velocity is in a range of 1.00-4.00 m/s, the DNIs are 500-1250 W/m~2 and the inlet temperature is 373-673 K, the CTD of the absorber can reach 22-94 K. The thermal stress and the deformations of the absorber are higher than that of the glass cover. The promising results will provide a fundamental reference for the development of the parabolic trough solar thermal power plant in China.
机译：抛物槽太阳能收集器系统（PTC）的性能提高在太阳能利用中起着至关重要的作用。为了解决PTC系统中与流体流动，传热和热应力有关的复杂问题，本文提出了一种基于太阳射线迹线（SRT）方法和基于有限元方法（FEM）的数值模拟方法。通过SRT方法计算出太阳能通量的分布，并数值研究了关键操作参数对接收器性能的影响。对接收器的应力强度分布和热变形进行了数值研究。数值模拟结果表明，吸收器的周向温差（CTD）随着入口温度和传热流体（HTF）速度的增加而减小，并随直接法向辐照度（DNI）的增加而增加。当入口速度在1.00-4.00 m / s范围内时，DNI为500-1250 W / m〜2，入口温度为373-673 K，吸收器的CTD可以达到22-94K。热应力和吸收体的变形高于玻璃盖。令人鼓舞的结果将为中国抛物槽式太阳能热电厂的发展提供基本的参考。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号