Janus-Type Hybrid Metamaterial with Reversible Solar-Generated Heat Storage and Release for High-Efficiency Solar Desalination of Seawater,Industrial & Engineering Chemistry Research

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Janus-Type Hybrid Metamaterial with Reversible Solar-Generated Heat Storage and Release for High-Efficiency Solar Desalination of Seawater
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-09-17 , DOI: 10.1021/acs.iecr.0c03175
Ruijun Zhang _{1,

2,

3} , Cui Liu _{1,

3} , Nian Li _{1,

3} , Liqing Chen _{1,

2,

3} , Tingting Xu _{1,

2,

3} , Yi Qin _{1,

2,

3} , Shudong Zhang _{1,

3} , Zhenyang Wang _{1,

3}

Affiliation

Interfacial solar seawater desalination, originating from the driving force of the conversion of sunlight into heat energy, has been facing the negative influence of intermittent solar radiation alternating between night and day. Here, a novel Janus-type hybrid metamaterial is proposed to prolong “the number of hours of sunshine” for efficient solar–thermal vaporization effect based on the surplus solar-generated heat input/output across the reversible solid–liquid phase transition from phase change materials (PCMs). The coaxial fiber membrane with PCM-loaded core–sheath structure is one of the most key materials of the hybrid metamaterial to extend the sunshine duration. The two layers of the Janus-type hybrid metamaterial presented the following characteristics: one side had a fast solar–thermal conversion, in situ heat storage ability, and the other had predominantly low thermal conductivity against thermal loss and good hydrophilicity for seawater absorption. Impressively, the exploiting metamaterial demonstrates a high solar thermic vaporization efficiency of 85.7% and a stable freshwater yield of 1.62 kg m^–2 h^–1 under 1 sun exposure. More importantly, the Janus-type hybrid metamaterial still exhibits an additional conversion efficiency of 8% attributed to surplus solar-generated heat output even without sunlight. Therefore, such a Janus-type hybrid metamaterial can provide a promising path for higher efficient solar-to-heat utilization.

中文翻译：

具有太阳能可逆蓄热和释放功能的Janus型混合超材料，可实现高效太阳能海水淡化

来自太阳光转化为热能的驱动力导致的界面太阳海水淡化一直面临着昼夜交替的间歇性太阳辐射的负面影响。在这里，提出了一种新型的Janus型混合超材料，它基于相变的可逆固液相变过程中多余的太阳能产生的热量输入/输出，延长了“日照小时数”，以实现有效的太阳热汽化效果。材料（PCM）。具有PCM加载的芯鞘结构的同轴纤维膜是混合超材料中延长日照时间的最关键材料之一。Janus型混合超材料的两层具有以下特征：一侧具有原位快速的太阳热转换储热能力强，另一个对热损失的热导率低，对海水吸收的亲水性好。令人印象深刻的是，正在开采的超材料显示出在1次日晒下，太阳热气化效率高达85.7％，稳定的淡水产量为1.62 kg m ^–2 h ^–1。更重要的是，即使没有阳光，Janus型混合超材料仍然具有8％的额外转换效率，这归因于多余的太阳能产生的热输出。因此，这种Janus型混合超材料可以为提高太阳能利用效率提供有希望的途径。

更新日期：2020-10-15

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