Abstract:

The use of electricity-assisted solar-driven interfacial evaporation technology is an effective way to increase fresh water production, but how to obtain fresh water in a green and efficient way remains a challenge. Therefore, in this paper we used an acrylic plate with holes as a support device, sprayed a mixed solution of CNT and ethanol on the carbon cloth as a photothermal electrothermal membrane and combined with water supply channels and thermal insulation devices to form an efficient evaporation system. The evaporation performance test results showed that the net evaporation rate of the designed evaporation system was up to 1.5 kg·m^-2·h^-1 under 1 standard sunlight irradiation, while the net evaporation rate rose to 5.08 kg·m^-2·h^-1 under the combination of the current of 2 A, the evaporation rate was 0.6 kg·m^-2·h^-1 higher than the sum of the two energy inputs. In addition, this evaporation system is simple, easy to scale up, providing a new idea for the green and efficient enhancement of the fresh water production.

Key words: combination of solar and electric energy, photothermal electrothermal membrane, interfacial evaporation, evaporation rate, green and efficient

摘要：

利用电能辅助的太阳能驱动界面蒸发技术是提高淡水产量的一个有效途径，但是如何绿色高效地获取淡水仍是一个挑战。利用带有孔洞的亚克力板作为支撑装置，在碳布上喷涂碳纳米管（CNT）和无水乙醇的混合溶液作为光热电热膜（CNT/PVA@碳布），与隔热装置和供水通道组成一个高效的界面蒸发系统。蒸发性能测试结果表明，该蒸发系统在1个标准太阳光照射下净蒸发速率达到1.5 kg·m^-2·h^-1，而在与 2 A电流的联合作用下，净蒸发速率高达5.08 kg·m^-2·h^-1，比仅在1个标准太阳光照射下和仅提供2 A电流的蒸发速率之和高出0.6 kg·m^-2·h^-1。此外，这种蒸发系统构造简单易于规模化，为绿色高效地提高淡水产量提供了一个新的思路。

关键词: 光电联合, 光热-电热膜, 界面蒸发, 蒸发速率, 绿色高效