传热
蒸发
余热回收装置
余热
材料科学
废物管理
环境科学
生产(经济)
化学工程
工程类
机械工程
热交换器
热力学
物理
宏观经济学
经济
作者
Xiao Luo,Jiang Long,Yunlong Guo,Hua Bao,C.Y. Zhao,Xiaokun Gu
标识
DOI:10.1016/j.enconman.2024.118226
摘要
Solar-driven interfacial evaporation technology exhibits notable performance in evaporation, with evaporation efficiency typically maintained at over 80 %. However, utilizing interfacial evaporation for efficient seawater desalination remains a challenge due to low production of freshwater. Therefore, we propose a desalination system based on unidirectional heat transfer solar still, which is capable of combining efficient evaporation with waste heat recovery to achieve high energy utilization. The design of the solar still decomposes the light transmission and condensation functions of the glass cover plate in traditional solar still for independent optimization and reserves space for integrating high-performance interfacial evaporation materials, while minimizing heat loss by ensuring unidirectional heat transfer inside the still. In particular, the proposed unidirectional heat transfer solar still provides a free interface to condense the vapor, where a multi-stage condensation is integrated to recycle latent heat. When using a self-made hydrogel sponge as the interfacial evaporation material, the solar still achieve efficient and stable freshwater production. Outdoor experiments showcase a evaporation rate of 6.0 kg·m−2·h−1, coupled with an freshwater production rate of 4.5 kg·m−2·h−1 under an average sunlight intensity of 1.07 kW·m−2. Our results demonstrate that the freshwater production of the solar still can be further improved. This work is beneficial for further enhancing freshwater collection of solar desalination.
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