Design optimization for evaporation property of coal fly ash-based evaporator during solar-driven interfacial evaporation process

IF 12.4 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL Water Research Pub Date : 2025-08-01 Epub Date: 2025-04-22 DOI:10.1016/j.watres.2025.123704

Zheng Zhang , Can Chen , Pengyu Chen , Jiguang Huang , Heng Zhang , Dan Gao , Haiping Chen

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Abstract

Solar-driven interfacial evaporation has recently attracted many attentions due to its energy-saving and environmentally friendly advantages. Researches on structural parameters optimization for the ceramic interfacial evaporators to improve their evaporation performance are lack. In this work, ceramic evaporators with different structural parameters are prepared using coal fly ash as the main material. A comparative experimental study was carried out under natural light. Water transport rate and maximum water transport volume of evaporators are introduced to explain the effect of structural parameters on the evaporation performance. Results indicate that smaller pore size and higher porosity can enhance the water transport and improve the evaporation rate. Evaporators with higher porosity has higher maximum water transport volume, thus the evaporation rate can be reduced due to the increase of the thermal conductivity of the evaporator. The optimized evaporator shows a high average evaporation rate of 4.72 kg·m⁻²·h⁻¹ under a solar irradiation of 0.66 kW·m⁻², and an average evaporation rate of 5.85 kg·m⁻²·h⁻¹ under one sun irradiation, with the mean pore size of 0.2204 μm and the porosity of 0.2855. This work provides a direction for structural parameters optimization in designing high-performance ceramic evaporators.

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太阳能驱动界面蒸发过程中粉煤灰蒸发器蒸发性能的优化设计

近年来，太阳能驱动界面蒸发因其节能环保的优点而受到广泛关注。对陶瓷界面蒸发器进行结构参数优化以提高其蒸发性能的研究较少。本文以粉煤灰为主要原料，制备了不同结构参数的陶瓷蒸发器。在自然光下进行了对比实验研究。介绍了蒸发器的输水量和最大输水量，说明了结构参数对蒸发器蒸发性能的影响。结果表明，孔隙度越小、孔隙率越高，水分输运能力越强，蒸发速率越快。孔隙率越高的蒸发器最大输水量越大，蒸发器导热系数的增加可以降低蒸发速率。优化后的蒸发器在0.66 kW·m−2太阳照射下的平均蒸发速率为4.72 kg·m−2·h−1，一次太阳照射下的平均蒸发速率为5.85 kg·m−2·h−1，平均孔径为0.2204 μm，孔隙率为0.2855。本研究为高性能陶瓷蒸发器的结构参数优化设计提供了方向。

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来源期刊

Water Research 环境科学-工程：环境

CiteScore

20.80

自引率

9.40%

发文量

1307

审稿时长

38 days

期刊介绍： Water Research, along with its open access companion journal Water Research X, serves as a platform for publishing original research papers covering various aspects of the science and technology related to the anthropogenic water cycle, water quality, and its management worldwide. The audience targeted by the journal comprises biologists, chemical engineers, chemists, civil engineers, environmental engineers, limnologists, and microbiologists. The scope of the journal include: •Treatment processes for water and wastewaters (municipal, agricultural, industrial, and on-site treatment), including resource recovery and residuals management; •Urban hydrology including sewer systems, stormwater management, and green infrastructure; •Drinking water treatment and distribution; •Potable and non-potable water reuse; •Sanitation, public health, and risk assessment; •Anaerobic digestion, solid and hazardous waste management, including source characterization and the effects and control of leachates and gaseous emissions; •Contaminants (chemical, microbial, anthropogenic particles such as nanoparticles or microplastics) and related water quality sensing, monitoring, fate, and assessment; •Anthropogenic impacts on inland, tidal, coastal and urban waters, focusing on surface and ground waters, and point and non-point sources of pollution; •Environmental restoration, linked to surface water, groundwater and groundwater remediation; •Analysis of the interfaces between sediments and water, and between water and atmosphere, focusing specifically on anthropogenic impacts; •Mathematical modelling, systems analysis, machine learning, and beneficial use of big data related to the anthropogenic water cycle; •Socio-economic, policy, and regulations studies.