Experimental study on liquid desiccant regeneration performance of solar still and natural convective regenerators with/without mixed convection effect generated by solar chimney

Tianhe Long, Dimeng Zheng, Yongcai Li*, Shuli Liu, Jun Lu, Dachuan Shi, Sheng Huang

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

17 引用 (Scopus)

摘要

Solar liquid desiccant regeneration process could passively makes full use of the air flow rate generated by a solar chimney, which is an indispensable part of a passive building. A series of experiments to investigate the performance of three different regenerators were conducted in August 2019 in Chongqing, a region in China with a hot and humid summer. The three different regenerators are the solar still, basic natural convective regenerator (NCR), and natural convective regenerator with a vertical solar chimney (NCR-SC). The improvement in mass transfer efficiency based on mixed convection generated by the solar chimney is clearly revealed. The results show that cloudy weather has a more seriously negative impact on the solar still, compared with the convective-type regenerator. Compared with the NCR, the convective mass transfer coefficient of the NCR-SC is increased by 32% on 20th August due to the mixed convection. However, this increment would be weakened in the case of high ambient wind velocity (only 16% on 25th August). The NCR-SC has the highest solar thermal efficiencies (57.8%–64.6%), followed by those of the NCR (48.4%–58.9%), whereas the solar still has the lowest values (30.3%–38.5%).

源语言英语
文章编号121919
期刊Energy
239
DOI
出版状态已出版 - 15 1月 2022

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