A Hygroscopic Composite Backplate Enabling Passive Cooling of Photovoltaic Panels
A Hygroscopic Composite Backplate Enabling Passive Cooling of Photovoltaic Panels
复制标题
DOI：
10.1021/acsenergylett.3c00196
复制
发表时间：
2023-03
影响因子：
22
通讯作者：
Zhenpeng Li;Tengyu Ma;F. Ji;He Shan;Y. Dai;Ruzhu Wang
中科院分区：
文献类型：
--
作者：
Zhenpeng Li;Tengyu Ma;F. Ji;He Shan;Y. Dai;Ruzhu Wang
冷却光伏（PV）很重要，因为升高的温度会降低效率和使用寿命，但在同时追求有效冷却、低材料成本和轻质额外组件时，这是一个巨大的挑战。本文提出了一种用于光伏板被动冷却的复合背板，该背板由具有吸附-蒸发冷却作用的吸湿性水凝胶和保护膜组成。此外，与传统PV背板的即时坚固粘合使得复合背板易于实施。因此，复合背板在多天的现场测试中显示出不降低的冷却性能。与通风条件良好的普通光伏板相比，不同气候条件下的平均日降温幅度在1.5 ~ 6.4℃之间，这意味着在25℃条件下的绝对发电量将增加0.57% ~ 2.43%。考虑到几乎不变的外观，适度的重量增加，和低原材料成本，这种复合背板有利于冷却光伏板的实现。
Cooling photovoltaics (PV) matters since elevated temperature reduces efficiency and lifetime, but it is a great challenge when simultaneously pursuing effective cooling, low material cost, and light extra components. We herein propose a composite backplate for the passive cooling of PV panels, which consists of hygroscopic hydrogels with an adsorption-evaporative cooling effect and protective membranes. Besides, instant tough bonding with conventional PV backsheet allows for the composite backplate ease of implementation. Consequently, the composite backplate demonstrates nondegrading cooling performance during multiday field tests. Compared to a normal PV panel with good ventilation conditions, the average temperature reduction of each day varies from 1.5 to 6.4 °C under different climate conditions, indicating the absolute energy yield would increase by 0.57% to 2.43% of the yield under 25 °C. Considering the nearly unchanged appearance, moderate weight increase, and low raw material costs, this composite backplate facilitates benefiting from cooling PV panels attainable.