蓄能器在风能RO淡化系统中的试验研究

发布时间：2017-12-26 17:33

本文关键词：蓄能器在风能RO淡化系统中的试验研究　出处：《山东大学》2015年硕士论文　论文类型：学位论文

【摘要】：风能海水淡化技术的应用不仅有利于节能环保,而且能够缓解用水问题。本文针对因风能的间歇性和不稳定性对淡化系统带来的波动问题,结合蓄能器在液压系统中的应用,提出将蓄能器应用在风能RO淡化系统中。此方法具有提高系统压力波动稳定性、提高风能利用效率的优点。本文首先讨论了蓄能器的应用对系统压力波动的影响。对比分析无蓄能器时恒定转速下与加装蓄能器后变转速下系统的压力波动。试验结果表明：蓄能器可以将变转速状况下系统的压力波动减小到恒定转速状态；蓄能器缓冲压力的效果与蓄能器的体积、预充气压力、系统压力有关：恒定转速下,蓄能器充气压力为系统均压的60%时吸收效果较好；变转速下,蓄能器充气压力为系统压力的40%90%时吸收效果较好。其次,建立了蓄能器、电磁阀稳压系统。研究了电磁阀,蓄能器体积、充气压力对风能RO系统的稳压效果的影响。试验结果表明：稳压系统中电磁阀起着至关重要的作用；当系统压力恒定时,蓄能器体积越大、充气压力越小,储存的能量越多稳压效果越好；当蓄能器体积、充气压力一定时,系统压力越高,储存的能量越多稳压效果越好。最后,本文结合蓄能器的数学模型,建立了Matlab模型,模拟分析了蓄能器体积、充气压力对系统压力波动的影响。模拟结果表明：蓄能器的充气压力和体积对压力波动的影响不仅体现在吸收率上,而且也体现在响应速度上；一般的蓄能器预充气压力越高,对系统压力波动吸收的响应越快；选取蓄能器充气压力时要结合实际工况来考虑,当系统压力变化较快时选择较高的预充气压力,当系统压力变化较慢时选择相对较低的预充气压力。
[Abstract]:The application of wind energy desalination technology is not only beneficial to energy conservation and environmental protection, but also can alleviate the problem of water use. Aiming at the fluctuation problem caused by the intermittency and instability of wind energy and the application of accumulator in hydraulic system, this paper puts forward the application of accumulator in the desalination system of wind energy RO. This method has the advantages of improving the stability of the pressure fluctuation of the system and improving the utilization efficiency of wind energy. In this paper, the influence of the application of the accumulator on the pressure fluctuation of the system is discussed. The pressure fluctuation of the system under the constant speed and the post variable speed of accumulator is compared and analyzed. The test results show that the accumulator can be variable pressure fluctuation speed conditions the system is reduced to a constant speed state; the accumulator pressure buffer and the effect of storage volume, pre heater, air pressure system pressure: under constant speed, charging pressure of accumulator system for equalizing 60% better absorption effect; variable speed, charging pressure of accumulator for system pressure 40%90% better absorption effect. Secondly, the accumulator and solenoid valve stabilizing system are set up. The influence of the solenoid valve, the accumulator volume and the inflating pressure on the stabilizing effect of the wind energy RO system is studied. The test results show that the electromagnetic valve plays a crucial role in stabilizing the system; when the system pressure is constant, the accumulator volume increases, inflation pressure is small, the better the more energy storage stabilizing effect; when the gas pressure is constant volume, energy storage system, the higher the pressure is, the better the more energy storage stabilizing effect. Finally, based on the mathematical model of accumulator, the Matlab model is established, and the influence of the accumulator volume and the inflating pressure on the pressure fluctuation of the system is simulated and analyzed. The simulation results show that the effects of air accumulator volume and pressure of the pressure fluctuation is not only reflected in the absorption, but also reflected in the response speed; the general accumulator precharge pressure is high, in response to the pressure fluctuation of the absorption system more quickly; selection pressure force to consider the actual the storage condition, when the system pressure changes rapidly and high pre charging pressure, when the system pressure changes slowly when choosing a relatively low pre charging pressure.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P747;TK89

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