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近年来,盐差能作为一种来源广泛、储量可观的绿色可再生能源受到广泛关注。其中,压力延迟渗透(pressure retarded osmosis,PRO)是一种基于渗透过程的极具前景的盐差能利用技术。压力延迟渗透过程中的水通量与最终的能量产出密切相关,因此建立水通量模型对该过程的机理研究、系统设计都具有重要意义。初步建立了在考虑浓差极化和反向盐渗透影响时,压力延迟渗透过程的水通量模型,并使用不同浓度Na Cl汲取液(0.5、1和2 mol·L~(-1))进行了实验实证。模型在低渗透压汲取液条件下拟合良好。此外,为了进一步提高拟合精度,从模型推导和实验测定2个方面分别讨论了可能的提高途径。
In recent years, salt tolerance has drawn extensive attention as a green renewable energy source with a wide range of sources and considerable reserves. Among them, pressure retarded osmosis (PRO) is a promising salt differential energy utilization technology based on infiltration process. The water flux in the process of pressure delay infiltration is closely related to the final energy output. Therefore, establishing the water flux model is of great significance to the mechanism research and system design of this process. The water flux model of delayed pressure infiltration process was preliminarily established when considering the effects of concentration polarization and reverse osmosis infiltration. Different concentrations of Na Cl (0.5, 1 and 2 mol·L -1) Experiments have been carried out. The model fits well under low osmotic drawdown conditions. In addition, in order to further improve the fitting accuracy, the possible ways of improvement are discussed separately from two aspects of model derivation and experimental measurement.