Sunlight-heating and electricity-heating interfacial evaporation membrane driven by sunlight and electricity from photovoltaic panels for steam production

Autor: Qunpeng Cheng, Yun He, Shunxi Zhang, Xiaofeng Pang, Wenjuan Shen, Yunjun Mei, Jianfen Li, Juntao Yan, Zhen Yue
Rok vydání: 2021
Předmět:
Zdroj: Solar Energy Materials and Solar Cells. 230:111274
ISSN: 0927-0248
Popis: The sunlight-heating and electricity-heating interfacial evaporation membrane (SHEHIEM), which is prepared mainly using wood pulp and MWCNTs and is directly driven by sunlight and electricity from photovoltaic panels, is adopt to produce more steam at a very low cost. The results show that some SHEHIEMs of different compositions, having higher steam yield in sunlight heating, can hardly run in electricity heating and the season is that the resistance of SHEHIEM changes sharply during absorbing water. Thus, according to resistance, hydrophilicity, steam yield, SEM, XRD, FTIR, TG, absorption spectra and tensile strength, the composition of SHEHIEM is determined and optimized. When the SHEHIEM is operated in only electricity heating, only sunlight heating, sunlight and electricity heating (S&E heating), the steam yield of S&E heating is the highest and 1.30 kg/m2 for 0.5 KW, 1.90 kg/m2 for 1 KW, 2.37 kg/m2 for 1.5 KW, 2.86 kg/m2 for 2 KW and 3.23 kg/m2 for 2.5 KW, respectively. Meantime, its energy conversion efficiencies are also the highest and 62.7% for 0.5 KW, 68.4% for 1 KW, 68.8% for 1.5 KW, 69.3% for 2 KW and 67.2% for 2.5 KW, respectively, and the SHEHIEM shows synergistic effects. For S&E heating of 1 kW/m2 and 2 kW/m2, 10 h consecutive tests show that the SHEHIEM has better stability. After evaporation, all the detected indicators meet the drinking water standard of WHO. In the open, when the SHEHIEM is run for 7 h in winter, the production water mass and energy conversion efficiencies are 9.03 kg/m2 and 55.4% for 1 KW and 15.67 kg/m2 and 61.0%.
Databáze: OpenAIRE
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