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Experimental investigation of porous disc enhanced receiver for solar parabolic trough collector

机译：太阳能抛物槽集热器多孔盘增强接收器的实验研究

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摘要

In this article, experimental investigation of 15 m~2 solar parabolic trough collector with porous disc enhanced receiver is carried out according to ASHRAE 93-1986 test procedure. Six different receiver configurations are developed and investigated to compare their performance. The performance of solar parabolic trough collector with two conventional and four porous disc receivers is characterized in terms of time constant, collector acceptance angle, peak performance, daily performance and heat loss tests. The tests are carried out for wide range of flow rates (100 L/h-1000 L/h) and weather conditions. Based on experimental investigation, the time constant of the parabolic trough collector is varied from 70 s to 260 s for different receiver configurations. The collector acceptance angle is determined for both unshielded tubular receiver (USTR) and shielded tubular receiver (STR) as 0.58° and 0.68° respectively. The collector efficiencies are obtained as in the range of 63.9%-66.66% under ASHRAE standard test condition. Off-Sunset heat loss test is conducted to determine the steady state heat losses from the parabolic trough collector receiver. The heat losses from the parabolic trough collector are in the range of 455 W/ m~2-1732 W/m~2 for average fluid temperature of T_(amb) + 30 ℃. Stagnation temperature of the collector is obtained as 258 ℃ and 312 ℃ respectively for USTR and STR corresponding to direct normal insolation (DNI) of 786 W/m~2 and 761 W/m~2. Based on the above analysis, the porous disc enhanced receiver improves the performance of the parabolic trough collector significantly and it can be used effectively for process heat applications.
机译：本文根据ASHRAE 93-1986试验程序，对具有多孔圆盘增强接收器的15 m〜2日光抛物槽集热器进行了实验研究。开发并研究了六种不同的接收器配置，以比较它们的性能。具有两个常规和四个多孔圆盘接收器的太阳能抛物槽式集热器的性能通过时间常数，集热器接受角，峰值性能，日常性能和热损失测试来表征。在各种流量（100 L / h-1000 L / h）和天气条件下进行测试。根据实验研究，对于不同的接收器配置，抛物线形波谷收集器的时间常数从70 s变为260 s。非屏蔽管状接收器（USTR）和屏蔽管状接收器（STR）的收集器接受角分别确定为0.58°和0.68°。在ASHRAE标准测试条件下，收集器效率在63.9％-66.66％的范围内。进行日落热损失测试以确定抛物槽式集热器接收器的稳态热损失。对于平均流体温度T_（amb）+ 30℃，抛物槽式集热器的热损失在455 W / m〜2-1732 W / m〜2的范围内。 USTR和STR的集热器的停滞温度分别为258℃和312℃，分别对应于786 W / m〜2和761 W / m〜2的直接法向日照（DNI）。根据以上分析，多孔盘增强型接收器可显着提高抛物线槽式集热器的性能，可有效地用于过程热应用。

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  • 来源
    《Renewable energy》 |2015年第5期|308-319|共12页
  • 作者

    K.S. Reddy; K. Ravi Kumar; C.S. Ajay;

  • 作者单位

    Heat Transfer and Thermal Power Laboratory, Department of Mechanical Engineering, Indian Institute of Technology Madras, Chennai 600036, India;

    Heat Transfer and Thermal Power Laboratory, Department of Mechanical Engineering, Indian Institute of Technology Madras, Chennai 600036, India;

    Heat Transfer and Thermal Power Laboratory, Department of Mechanical Engineering, Indian Institute of Technology Madras, Chennai 600036, India;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Solar energy; Parabolic trough collector; Porous disc; Performance analysis; Process heat;

    机译：太阳能;抛物线槽收集器;多孔盘绩效分析;工艺热量;

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