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浙江大学学报(工学版)
浙江大学学报(工学版)  2024, Vol. 58 Issue (7): 1498-1504    DOI: 10.3785/j.issn.1008-973X.2024.07.019
机械工程、能源工程     
具有板式基底结构的界面蒸发系统性能模拟
李思彤(),葛洪宇,康培森,穆林,刘晓华*()
大连理工大学 能源与动力学院，海洋能源利用与节能教育部重点实验室，辽宁 大连 116024
Numerical simulation of interfacial evaporation system performance with plate substrate structure
Sitong LI(),Hongyu GE,Peisen KANG,Lin MU,Xiaohua LIU*()
School of Energy and Power Engineering, Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian 116024, China
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摘要：

针对具有板式基底结构的太阳能界面蒸发系统建立三维数学模型，利用Ansys Fluent软件求解该系统的蒸发过程，研究板缝宽度及料液质量分数对界面蒸发过程的影响. 结果表明：蒸发速率随板缝宽度和料液质量分数的增大而减小；当基底输水量小于蒸发需求时，蒸发界面出现干涸现象，干涸现象出现后蒸发速率显著降低；当板缝宽度为0.5 mm时，与最大蒸发速率对应的料液质量分数为3.5%~5.0%；当料液质量分数为3.5%时，与最大蒸发速率对应的板缝宽度为0.5~0.6 mm；系统能量利用率变化规律与蒸发速率基本一致. 蒸发过程中蒸发量与料液供给量的匹配是影响板式基底结构的太阳能界面蒸发系统性能的重要因素.
关键词： 基底结构;  界面蒸发;  板缝宽度;  料液质量分数;  蒸发速率    
Abstract:

A three-dimensional mathematical model was established for a solar interfacial evaporation system with a plate substrate structure, and the evaporation process of the system was solved using Ansys Fluent software. The effects of the slit width and mass fraction of feed water on the interfacial evaporation process were investigated. Results show that the evaporation rate decreases with the increase of slit width and mass fraction of feed water. The evaporation interface dries up, and the evaporation rate decreases significantly when the substrate water delivery is less than the evaporation demand. When the slit width is 0.5 mm, the mass fraction of feed water corresponds to the maximum evaporation rate is 3.5% to 5.0%. When the mass fraction of feed water is 3.5%, the slit width corresponds to the maximum evaporation rate is 0.5 mm to 0.6 mm. The pattern of change in the energy utilization of the system is basically the same as the evaporation rate. The matching of evaporation rate and feed water supply during the evaporation process is one of the important factors affecting the performance of solar interfacial evaporation systems with plate substrate structure.
Key words: substrate structure    interfacial evaporation    slit width    mass fraction of feed water    evaporation rate
收稿日期: 2023-06-30 出版日期: 2024-07-01
CLC:  TK 519  
基金资助: 大连市科技创新基金资助项目（2021JJ12GX024）； 辽宁省中央引导地方科技发展专项（2021JH6/10500150）.
通讯作者: 刘晓华     E-mail: lisitong0522@163.com;lxh723@dlut.edu.cn
作者简介: 李思彤（1998—），女，硕士生，从事太阳能界面蒸发研究. orcid.org/0009-0009-6496-0960. E-mail：lisitong0522@163.com
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李思彤
葛洪宇
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刘晓华

引用本文:

李思彤,葛洪宇,康培森,穆林,刘晓华. 具有板式基底结构的界面蒸发系统性能模拟[J]. 浙江大学学报(工学版), 2024, 58(7): 1498-1504.

Sitong LI,Hongyu GE,Peisen KANG,Lin MU,Xiaohua LIU. Numerical simulation of interfacial evaporation system performance with plate substrate structure. Journal of ZheJiang University (Engineering Science), 2024, 58(7): 1498-1504.

链接本文:

https://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2024.07.019    或    https://www.zjujournals.com/eng/CN/Y2024/V58/I7/1498

图 1  板式基底结构界面蒸发系统物理模型
wB/%ρ/(kg?m?3)λ/(W?m?1?K?1)μ/(kg?m?1?s?1)Cp/(J?kg?1?K?1)σ/(N?m?1)
0996.40.6130.854×10?34 185.671.686×10?3
3.51 023.00.6110.920×10?34 001.572.789×10?3
5.01 034.40.6100.953×10?33 928.173.262×10?3
7.01 049.60.6091.000×10?33 835.373.892×10?3
13.01 095.20.6061.168×10?33 592.175.783×10?3
表 1  盐水的物性参数（T=300 K）
图 2  不同网格数的蒸发速率
图 3  蒸发实验台
图 4  蒸发速率随料液质量分数的变化
图 5  板缝宽度为0.5 mm时蒸发过程中液膜铺展变化
图 6  板缝宽度为0.5 mm时蒸发速率随时间的变化
图 7  蒸发过程中气液界面附近随时间变化的压力云图
图 8  蒸发平台上的温度分布变化
图 9  板缝宽度为0.4 mm时蒸发过程中液膜铺展变化
图 10  板缝宽度为0.8 mm时蒸发速率随时间的变化
图 11  板缝宽度为0.8 mm时蒸发过程中液膜的动态特性
图 12  板缝宽度对液膜厚度的影响 （wB=3.5%）
图 13  板缝宽度对蒸发速率的影响 （wB=3.5%）
图 14  蒸发过程中的液膜铺展 （wB=0）
图 15  蒸发速率随时间的变化 （wB=0）
图 16  不同料液质量分数下蒸发速率随板缝宽度的变化
图 17  不同料液质量分数下能量利用率随板缝宽度的变化
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