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首页> 外文OA文献 >Renewable energy-powered membrane technology: Supercapacitors for buffering resource fluctuations in a wind-powered membrane system for brackish water desalination
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Renewable energy-powered membrane technology: Supercapacitors for buffering resource fluctuations in a wind-powered membrane system for brackish water desalination

机译：可再生能源动力膜技术：超级电容器，用于缓冲风力膜系统中的资源波动，用于咸淡化海水淡化

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The potential for supercapacitors to expand the safe operating window of a wind-powered reverse osmosis membrane (wind-membrane) system by buffering short term wind fluctuations and intermittency was investigated. Experiments were carried out using synthetic brackish water (5500 mg/L NaCl) with three sizes of supercapacitor bank to determine the effect of increasing the short term energy storage capacity. The wind speed ranged from 4 to 14 m/s for both intermittency and fluctuation experiments, with periods of no-power of 0.5–5 min and 15 s–20 min cycles, respectively. When the wind-membrane system was powered by the supercapacitors, wind speeds of >7 m/s were required for the supercapacitor bank state of charge (SOC) to increase, otherwise they discharged gradually to a threshold value dictated by the control electronics. While the SOC of the supercapacitors was above this threshold value, the operation of the wind-membrane system was as under steady-state conditions, thereby achieving independence of the wind speed fluctuations or intermittency. This resulted in an 85% increase in the average flux and 40% increase in permeate quality under fluctuations when compared to the system performance without supercapacitors. It is concluded that supercapacitors are an effective method of buffering short term wind speed fluctuations to provide steady-state performance and improve the productivity of renewable energy membrane systems.
机译：研究了超级电容器通过缓冲短期风的波动和间歇性来扩大风电反渗透膜（风膜）系统的安全运行窗口的潜力。使用具有三种尺寸的超级电容器组的合成咸水（5500 mg / L NaCl）进行实验，以确定增加短期储能能力的效果。对于间歇性实验和波动性实验，风速范围为4至14 m / s，无动力周期分别为0.5-5分钟和15 s-20分钟。当风膜系统由超级电容器供电时，要使超级电容器组的荷电状态（SOC）增加，风速必须大于7 m / s，否则它们会逐渐放电至控制电子设备指示的阈值。当超级电容器的SOC高于此阈值时，风膜系统的操作就像在稳态条件下一样，从而实现了风速波动或间歇性的独立性。与没有超级电容器的系统性能相比，在波动情况下，平均流量增加了85％，渗透质量增加了40％。结论是，超级电容器是缓冲短期风速波动以提供稳态性能并提高可再生能源膜系统生产率的有效方法。

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