Full Spectrum Solar Thermal Energy Harvesting and Storage by a Molecular and Phase-Change Hybrid Material
Full Spectrum Solar Thermal Energy Harvesting and Storage by a Molecular and Phase-Change Hybrid Material
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DOI：
10.1016/j.joule.2019.11.001
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发表时间：
2019-12-18
期刊：
影响因子：
39.8
通讯作者：
Ghasemi, Hadi
中科院分区：
文献类型：
--
作者：
Kashyap, Varun;Sakunkaewkasem, Siwakorn;Ghasemi, Hadi
高效的太阳热能收集和存储是利用到达地球表面的丰富太阳辐射的关键步骤。当前的太阳能热方法依赖于昂贵的高聚光系统，导致热散装材料和表面的高热损失。同时，以热能形式存储的能量本质上具有较大的时间损失。在这里，我们结合了分子能量和潜热存储的物理原理，引入了一种集成的、同时收集和存储的混合范例，以实现潜在的 24/7 能量传输。混合范例利用白天的热量定位，在小规模下提供 73% 的收集效率，在大规模下提供 -90% 的收集效率。值得注意的是，与所有现有系统相比，在夜间，混合动力系统存储的能量可以在比白天更高的温度下以 80% 的效率回收。
Efficient solar thermal energy harvesting and storage are critical steps toward utilizing the abundant solar irradiation that reaches the surface of the earth. Current solar thermal approaches rely on costly high optical concentration systems, leading to high heat losses by hot bulk materials and surfaces. At the same time, the energy stored in the form of thermal energy has inherently large temporal losses. Here, we combine the physics of molecular energy and latent heat storage to introduce an integrated, simultaneous harvesting and storage hybrid paradigm for potential 24/7 energy delivery. The hybrid paradigm utilizes heat localization during the day to provide a harvesting efficiency of 73% at small scale and -90% at large scale. Remarkably, at night, the stored energy by the hybrid system is recovered with an efficiency of 80% and at a higher temperature than that of the day, in contrast to all of the state-of-the systems.