A Solar-Driven hybrid dehumidification system with spectrum splitting technology for efficient operation across a broad range of humidity

IF 9.9 1区工程技术 Q1 ENERGY & FUELS

Energy Conversion and Management Pub Date : 2025-04-22 DOI:10.1016/j.enconman.2025.119779

Xiaobo Zhang , Ziyang Guo , Xiangguo Xu , Duu-Jong Lee

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引用次数: 0

Abstract

Solar-driven dehumidification systems, as a clean and sustainable technology, have attracted much attention. To expand its applications, it is necessary to improve its dehumidification efficiency and range. This study develops a solar-driven hybrid dehumidification system integrated with spectrum splitting technology. Spectrum splitting technology can separate long- and short-wavelength solar radiation, making them convert into electricity and thermal energy concurrently in a decoupled way. Subsequently, a new dehumidification configuration is proposed to efficiently leverage the converted energy, where vacuum membrane dehumidification systems (relying on electricity) and liquid desiccant dehumidification systems (relying on thermal energy) are combined in series to dehumidify the air. Such dehumidification configuration under various operation conditions is theoretically assessed. The results show that solar energy converted electricity is not fully utilized, and the air humidity ratio remains high. An improved configuration is subsequently developed, including additional vacuum membrane modules in the vacuum membrane dehumidification system to further reduce the air humidity ratio and a battery to store the excess electrical energy while handling the intermittency of solar energy. The performance of the improved configuration is theoretically assessed regarding the lowest air humidity ratio, exergy efficiency, and operation duration. The results show that the air humidity ratio can reach below 1 g/kg, meeting most application scenarios. The exergy efficiency can reach up to 6.2 %, representing an increase of up to 100 % compared to previous systems. Moreover, the proposed configuration can operate all day at various humidity levels by optimizing the concentration ratio. The proposed configuration provides a promising way for clean and efficient dehumidification across a broad range of humidity levels.

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一种太阳能驱动的混合除湿系统，具有光谱分裂技术，可在广泛的湿度范围内有效运行

太阳能除湿系统作为一种清洁、可持续发展的技术受到了广泛的关注。要扩大其应用范围，必须提高其除湿效率和除湿范围。本研究开发了一种太阳能驱动的混合除湿系统，该系统集成了光谱分裂技术。分光技术可以将长波和短波长的太阳辐射分离，使其同时解耦转化为电能和热能。随后，为了有效利用转化的能量，提出了一种新的除湿配置，将真空膜除湿系统（依靠电力）和液体干燥剂除湿系统（依靠热能）串联起来，对空气进行除湿。从理论上对各种工况下的除湿配置进行了评估。结果表明，太阳能转换的电能没有得到充分利用，空气湿度比仍然很高。随后开发了改进的配置，包括在真空膜除湿系统中额外的真空膜模块，以进一步降低空气湿度比，以及在处理太阳能间歇性时存储多余电能的电池。改进后的配置性能从理论上评估最低空气湿度比、火用效率和运行时间。结果表明，空气湿度比可达到1 g/kg以下，满足大多数应用场景。其火用效率可达6.2%，与以前的系统相比，提高了100%。此外，通过优化浓度比，所提出的配置可以在各种湿度水平下全天运行。提出的配置提供了一种有希望的方式，在广泛的湿度水平范围内进行清洁和有效的除湿。

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来源期刊

Energy Conversion and Management 工程技术-力学

CiteScore

19.00

自引率

11.50%

发文量

1304

审稿时长

17 days

期刊介绍： The journal Energy Conversion and Management provides a forum for publishing original contributions and comprehensive technical review articles of interdisciplinary and original research on all important energy topics. The topics considered include energy generation, utilization, conversion, storage, transmission, conservation, management and sustainability. These topics typically involve various types of energy such as mechanical, thermal, nuclear, chemical, electromagnetic, magnetic and electric. These energy types cover all known energy resources, including renewable resources (e.g., solar, bio, hydro, wind, geothermal and ocean energy), fossil fuels and nuclear resources.