• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Separation and Purification Technology >Renewable energy powered membrane technology: Impact of solar irradiance fluctuations on performance of a brackish water reverse osmosis system
【24h】

Renewable energy powered membrane technology: Impact of solar irradiance fluctuations on performance of a brackish water reverse osmosis system

机译：可再生能源动力膜技术：太阳辐照度波动对微咸水反渗透系统性能的影响

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

Fluctuations in solar irradiance were varied in frequency and magnitude to investigate the performance of a directly-connected solar energy powered reverse osmosis (RO) membrane system. Typically, the system produced acceptable quality water with constant solar irradiances ranging from 400 to 1200 W Low average motor powers were encountered during fluctuations, however, in many cases, good performance was still realised, even at solar irradiance values that were equivalent to <400 W m(-2). This counter-intuitive result arises from the effect of averaging the motor power, with periods of high solar irradiance compensating for the under-performance at times when the system was off. Overall, even though the permeate flux was often low when operating under fluctuating conditions, the RD system continued to deliver satisfactory quality water and at a low specific energy consumption (SEC). Temporal studies revealed that a disruption of the concentration polarisation layer occurs via a naturally induced backwash for steps in the solar irradiance as low as 100 W m(-2). This suggests that a renewable energy powered RO filtration system could benefit from being operated from a fluctuating energy source. Furthermore, the operating conditions during the first couple of minutes after a system shutdown event is shown to be very important, with: (i) shorter off-periods resulting in good performance being achieved quicker, and (ii) short-term power availability dramatically improving system performance. These findings indicate that a renewable energy powered RO system can operate well from a fluctuating energy source, in particular when additional power - for example, via supercapacitor energy buffering - is available to boost the system after a shut-down period. (C) 2015 Elsevier B.V. All rights reserved.
机译：太阳辐照度的波动在频率和幅度上有所变化，以研究直接连接的太阳能驱动的反渗透（RO）膜系统的性能。通常，系统产生的水质量稳定，日照强度恒定在400到1200 W之间，波动时平均电动机功率较低，但是在许多情况下，即使日照强度等于<400，仍然可以获得良好的性能。 W m（-2）。这种违反直觉的结果是由平均电动机功率的效果引起的，在系统关闭时，高太阳辐照度可补偿性能不足。总体而言，即使在波动条件下运行时渗透通量通常很低，RD系统仍能以较低的单位能耗（SEC）持续提供令人满意的优质水。时间研究表明，浓度偏光层的破坏是通过自然诱导的反冲洗发生的，从而使太阳辐照度低至100 W m（-2）。这表明可再生能源驱动的反渗透过滤系统可以受益于波动的能源运行。此外，在系统关闭事件发生后的前几分钟内，运行状况非常重要，原因包括：（i）较短的停机时间导致更快地获得良好的性能，并且（ii）短期电源可用提高系统性能。这些发现表明，可再生能源驱动的反渗透系统可以在波动的能源下良好运行，尤其是在停机后可利用额外的功率（例如，通过超级电容器能量缓冲）来增强系统的情况下。 （C）2015 Elsevier B.V.保留所有权利。

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