Preparation and interfacial evaporation properties of 3D photothermal absorber

doi:10.19965/j.cnki.iwt.2024-0088

Industrial Water Treatment ›› 2025, Vol. 45 ›› Issue (2): 78-84. doi: 10.19965/j.cnki.iwt.2024-0088

• RESEARCH AND EXPERIMENT • Previous Articles Next Articles

Preparation and interfacial evaporation properties of 3D photothermal absorber

Xi HUAN¹^,²(), Wei WANG¹^,²(), Haobin JIN¹, Ziyu TIAN³, Jingnan WANG¹, Gege HU¹, Siyuan KANG¹, Shuaili BAI¹^,⁴

^1. Xianyang Key Laboratory of Solar Thermal Conversion Materials, School of Aeronautical Engineering, Shaanxi Polytechnic Institute, Xianyang 712000, China
^2. School of Optoelectronic Engineering, Xi'an Technological University, Xi'an 710021, China
^3. College of Mechanical & Electrical Engineering, Shaanxi University of Science & Technology, Xi'an 710021, China
^4. School of Mechanical & Electrical Engineering, Wuhan Institute of Technology, Wuhan 430205, China

Received:2024-12-18 Online:2025-02-20 Published:2025-02-24
Contact: Wei WANG

三维光热吸收材料的制备及界面蒸发性能

桓茜¹^,²(), 王伟¹^,²(), 靳浩斌¹, 田子谕³, 王婧楠¹, 胡格格¹, 康思远¹, 白帅丽¹^,⁴

^1. 陕西工业职业技术学院航空工程学院，咸阳市太阳能光热转换材料重点实验室，陕西咸阳 712000
^2. 西安工业大学光电工程学院，陕西西安 710021
^3. 陕西科技大学机电工程学院，陕西西安 710021
^4. 武汉工程大学机电工程学院，湖北武汉 430205

通讯作者: 王伟
作者简介:
桓茜（1991— ），硕士，讲师，E-mail：huanqian@sxpi.edu.cn。
基金资助:
陕西省创新能力支撑计划项目(2023KJXX-079); 陕西省自然科学基础研究计划项目(2024JC-YBMS-271); 陕西省教育厅科研计划项目(24JP012); 咸阳市渭城区科技发展计划项目(2024VCZY-005); 陕西工业职业技术学院科研基金项目(2023YKZD-003)

Abstract

Abstract:

Environmental pollution and climate change have caused freshwater scarcity and there is an urgent need for green freshwater preparation technologies. Solar-driven water evaporation, as a low-carbon, environmentally friendly, and efficient desalination technology, is a new strategy to solve the freshwater shortage problem. The key to high-performance solar evaporation technology lies in the rapid photothermal conversion, water transportation, and vapor dispersion of the evaporation materials. Inspired by the porous structure of natural biomass materials, biomass-derived carbonized corn stalk evaporators with high photothermal conversion and water supply capacity were constructed by freeze-drying and carbonization processes. The evaporation performance was studied. The results showed that the porous biomass evaporator under wetting condition could absorb up to 91.6% of sunlight, and the water evaporation rate and the photothermal conversion efficiency under the solar irradiation of 1 kW/m² could reach 1.31 kg/(m²·h) and 89%, respectively. In addition, the enhanced effects of 3D structures with different heights on the evaporation performance were investigated. The evaporation rate and efficiency of the evaporator were elevated to 3.41 kg/(m²·h) and 90%, respectively, based on the 3D structural design, with excellent evaporation/desalination abilities.

Key words: solar evaporation, desalination, 3D structure, biomass evaporator

摘要：

环境污染和气候变化导致淡水紧缺，迫切需要绿色环保的淡水制备策略。太阳能驱动水蒸发作为低碳、环保、高效的海水淡化技术，是一种解决淡水资源短缺问题的新策略。高性能太阳能蒸发技术的关键在于蒸发材料应具有快速光热转换、水运输和蒸汽扩散性能。对此，受自然生物质多孔结构启发，通过冷冻干燥和炭化工艺制备了具有高光热转换和水供给能力的生物质衍生炭化玉米秆蒸发器，研究了其蒸发性能，结果表明：润湿条件下多孔炭化玉米秆蒸发器对太阳光的吸收率可达91.6%，在1 kW/m²太阳光照强度下水蒸发速率和光热转换效率分别可达1.31 kg/（m²·h）和89%。此外，研究了不同高度的三维结构对蒸发性能的增强影响，基于三维结构设计，炭化玉米秆蒸发器的蒸发速率和效率分别可提升至3.41 kg/（m²·h）和90%，具备出色的蒸发/淡化海水能力。

关键词: 太阳能蒸发, 海水淡化, 三维结构, 生物质蒸发器

CLC Number:

P747
TK519

Xi HUAN, Wei WANG, Haobin JIN, Ziyu TIAN, Jingnan WANG, Gege HU, Siyuan KANG, Shuaili BAI. Preparation and interfacial evaporation properties of 3D photothermal absorber[J]. Industrial Water Treatment, 2025, 45(2): 78-84.

桓茜, 王伟, 靳浩斌, 田子谕, 王婧楠, 胡格格, 康思远, 白帅丽. 三维光热吸收材料的制备及界面蒸发性能[J]. 工业水处理, 2025, 45(2): 78-84.

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URL: https://www.iwt.cn/EN/10.19965/j.cnki.iwt.2024-0088

https://www.iwt.cn/EN/Y2025/V45/I2/78

Figures/Tables 9

Fig.1 Digital photo of CCS evaporators

Fig.2 Indoor（a） and outdoor（b） evaporation testing platforms

Fig.3 SEM images and optical absorption curves of CCS

Fig.4 Elemental compositions and functional groups of CCS

Fig.5 Water absorption properties of CCS

Fig.6 Evaporation performance testing of CCS obtained at different carbonization temperatures

Fig.7 Steam production capacity of 3D-CCS with different heights

Fig.8 Temperature distributions of 3D-CCS evaporator at different positions

Fig.9 Outdoor evaporation test of CCS-500-4

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