静电场对调湿盐溶液-空气界面及粒子作用影响机理

TB616%TQ021.4; 为探索静电场作为强化气液界面能质传递新方法的可行性,研究了静电场强化盐溶液-空气体系能质传递的微观机理.以质量分数为50％的溴化锂溶液为例,运用分子动力学模拟方法定量分析了强度为0～1 V/nm的静电场作用下界面结构特性、粒子间相互作用及输运性质的变化.结果表明,外加静电场可以增加气液界面区域厚度,影响水分子取向,从而增加水分子参与到能质传递过程中的概率;外加静电场还可以减弱粒子间相互作用力,减小表面张力,破坏界面层氢键结构,从而减弱相际能质传递阻力.在多因素共同作用下,气液界面水分子自扩散系数增大,从而强化相际能质传递.因此,外加静电场通过调控界面结构及分子行为...

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Published in	东南大学学报（自然科学版） Vol. 54; no. 2; pp. 487 - 494
Main Authors	雷冰洁, 殷勇高, 范芳苏
Format	Journal Article
Language	Chinese
Published	东南大学能源与环境学院,南京 210096 01.03.2024
Subjects	mo-lecular dynamics 能质传递 electric field enhancement 溶液除湿分子动力学 solution dehumidification 电场强化 liquid-vapor interface mass transfer 气液界面
Online Access	Get full text
ISSN	1001-0505
DOI	10.3969/j.issn.1001-0505.2024.02.027

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Abstract	TB616%TQ021.4; 为探索静电场作为强化气液界面能质传递新方法的可行性,研究了静电场强化盐溶液-空气体系能质传递的微观机理.以质量分数为50％的溴化锂溶液为例,运用分子动力学模拟方法定量分析了强度为0～1 V/nm的静电场作用下界面结构特性、粒子间相互作用及输运性质的变化.结果表明,外加静电场可以增加气液界面区域厚度,影响水分子取向,从而增加水分子参与到能质传递过程中的概率;外加静电场还可以减弱粒子间相互作用力,减小表面张力,破坏界面层氢键结构,从而减弱相际能质传递阻力.在多因素共同作用下,气液界面水分子自扩散系数增大,从而强化相际能质传递.因此,外加静电场通过调控界面结构及分子行为,成为调湿盐溶液-空气体系能质强化的新方法.
AbstractList	TB616%TQ021.4; 为探索静电场作为强化气液界面能质传递新方法的可行性,研究了静电场强化盐溶液-空气体系能质传递的微观机理.以质量分数为50％的溴化锂溶液为例,运用分子动力学模拟方法定量分析了强度为0～1 V/nm的静电场作用下界面结构特性、粒子间相互作用及输运性质的变化.结果表明,外加静电场可以增加气液界面区域厚度,影响水分子取向,从而增加水分子参与到能质传递过程中的概率;外加静电场还可以减弱粒子间相互作用力,减小表面张力,破坏界面层氢键结构,从而减弱相际能质传递阻力.在多因素共同作用下,气液界面水分子自扩散系数增大,从而强化相际能质传递.因此,外加静电场通过调控界面结构及分子行为,成为调湿盐溶液-空气体系能质强化的新方法.
Abstract_FL	To explore the feasibility of using electrostatic field as a new method to enhance energy and mass transfer at the gas-liquid interface,the micro-mechanism of electrostatic field enhancing energy and mass trans-fer in the salt solution-air system was studied.Taking the Lithium bromide solution with the mass fraction of 50％as an example,the changes of the interface structure characteristics,particle interaction and transport properties under the electrostatic field with the strength of 0 to 1 V/nm were quantitatively analyzed using the molecular dynamics simulation method.The results indicate that the external electrostatic field can increase the thickness of the gas-liquid interface area and affect the orientation of water molecules,thus increasing the prob-ability of water molecules participating in the energy and mass transfer process.The external electrostatic field can also weaken the interaction force between particles,reduce surface tension,destroy the hydrogen bonding structure of the interface layer,thereby weakening the resistance of energy and mass transfer between phases.Under the combined effects of several factors,the self-diffusion coefficients of water molecules at the gas-liq-uid interface increase,thus strengthening the interphase energy and mass transfer.Therefore,an external elec-trostatic field is expected to become a new method for enhancing the energy and mass of the humidifying salt solution-air system by regulating the interface structure and molecular behaviors.
Author	雷冰洁殷勇高范芳苏
AuthorAffiliation	东南大学能源与环境学院,南京 210096
AuthorAffiliation_xml	– name: 东南大学能源与环境学院,南京 210096
Author_FL	Yin Yonggao Lei Bingjie Fan Fangsu
Author_FL_xml	– sequence: 1 fullname: Lei Bingjie – sequence: 2 fullname: Yin Yonggao – sequence: 3 fullname: Fan Fangsu
Author_xml	– sequence: 1 fullname: 雷冰洁 – sequence: 2 fullname: 殷勇高 – sequence: 3 fullname: 范芳苏
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