TY - JOUR
T1 - Experimental study on liquid desiccant regeneration performance of solar still and natural convective regenerators with/without mixed convection effect generated by solar chimney
AU - Long, Tianhe
AU - Zheng, Dimeng
AU - Li, Yongcai
AU - Liu, Shuli
AU - Lu, Jun
AU - Shi, Dachuan
AU - Huang, Sheng
N1 - Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2022/1/15
Y1 - 2022/1/15
N2 - 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%).
AB - 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%).
KW - Liquid desiccant regeneration
KW - Mixed convection
KW - Natural convective regenerator
KW - Solar chimney
KW - Solar still
UR - http://www.scopus.com/inward/record.url?scp=85114418851&partnerID=8YFLogxK
U2 - 10.1016/j.energy.2021.121919
DO - 10.1016/j.energy.2021.121919
M3 - Article
AN - SCOPUS:85114418851
SN - 0360-5442
VL - 239
JO - Energy
JF - Energy
M1 - 121919
ER -