Research on water evaporation efficiency of porous cement-based photothermal conversion materials

IF 4.7 3区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY Journal of Sustainable Cement-Based Materials Pub Date : 2022-12-08 DOI:10.1080/21650373.2022.2153455

Shizhe Wang, Jing Wu, Zhixian Wang, Song You, Haiping Wu, Luoxin Wang

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引用次数: 2

Abstract

Rational storage and efficient utilization of rainwater resources are effective means to solve the problems of urban waterlogging and clean water shortage. Many new photothermal conversion devices have been developed for seawater desalination, but the photothermal conversion function has rarely been applied to building materials for water purification. In this study, porous cement-based photothermal conversion materials (PCPCM) were prepared by coating a layer of photothermal conversion materials on the surface of porous cement products, and their photothermal conversion efficiency and water evaporation efficiency were investigated. The results show that PCPCM with graphene as photothermal conversion layer has the highest photothermal conversion efficiency and water evaporation rate of 76.08% and 1.162 kg m−2 h−1, respectively, under one sunlight intensity (1.0 KW m−2). This work presents a key step towards efficient, low-cost and sustainable purification of rainwater into clean water with renewable solar energy, providing new ideas for functional sponge city design.

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多孔水泥基光热转换材料水分蒸发效率研究

雨水资源的合理储存和高效利用是解决城市内涝和清水短缺问题的有效手段。已经开发了许多用于海水淡化的新型光热转换装置，但光热转换功能很少应用于用于水净化的建筑材料。本研究通过在多孔水泥制品表面涂覆一层光热转换材料制备了多孔水泥基光热转换材料，并对其光热转换效率和水蒸发效率进行了研究。结果表明，以石墨烯为光热转换层的PCPCM具有最高的光热转换效率，水蒸发率分别为76.08%和1.162 kg m−2 h−1，在一个阳光强度（1.0 KW m−2）。这项工作为利用可再生太阳能高效、低成本和可持续地将雨水净化为清洁水迈出了关键一步，为功能性海绵城市设计提供了新思路。

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来源期刊

Journal of Sustainable Cement-Based Materials Multiple-

CiteScore

6.60

自引率

15.90%

发文量

期刊介绍： The Journal of Sustainable Cement-Based Materials aims to publish theoretical and applied researches on materials, products and structures that incorporate cement. The journal is a forum for discussion of research on manufacture, hydration and performance of cement-based materials; novel experimental techniques; the latest analytical and modelling methods; the examination and the diagnosis of real cement and concrete structures; and the potential for improved cement-based materials. The journal welcomes original research papers, major reviews, rapid communications and selected conference papers. The Journal of Sustainable Cement-Based Materials covers a wide range of topics within its subject category, including but are not limited to: • raw materials and manufacture of cement • mixing, rheology and hydration • admixtures • structural characteristics and performance of cement-based materials • characterisation techniques and modeling • use of fibre in cement based-materials • degradation and repair of cement-based materials • novel testing techniques and applications • waste management