Thermal energy grid storage: Liquid containment and pumping above 2000 °C
Thermal energy grid storage: Liquid containment and pumping above 2000 °C
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DOI：
10.1016/j.apenergy.2021.118081
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发表时间：
2022-02-15
期刊：
影响因子：
11.2
通讯作者：
Henry, Asegun
中科院分区：
文献类型：
--
作者：
Amy, Caleb;Pishahang, Mehdi;Henry, Asegun
随着可再生能源的成本福尔斯降到化石燃料以下，可持续电力的广泛应用的主要障碍已经变成了按需供应。储能可以实现可调度的可再生能源，但与目前的电池技术相比，成本只有大幅降低。一种能够实现这些成本降低的电存储概念将电作为显热存储在极热液体（> 2000 ℃）中，并使用多结光电转换器（MPV）作为热机，以在几小时或几天后按需将其转换回电。本文报道了第一次遏制和泵的硅在一个多部分的石墨罐高于2000 ℃，使用的材料等级，是负担得起的能量存储在千兆瓦时规模。低成本的模制石墨的颗粒尺寸大至10微米成功地包含冶金级硅，甚至多达三分之二的铁质量长达10小时，温度高达2300 ℃，在两加仑大的坦克。
As the cost of renewable energy falls below fossil fuels, the key barrier to widespread sustainable electricity has become availability on demand. Energy storage can enable dispatchable renewables, but only with drastic cost reductions compared to current battery technologies. One electricity storage concept that could enable these cost reductions stores electricity as sensible heat in an extremely hot liquid (> 2000 & DEG;C) and uses multi-junction photovoltaics (MPV) as a heat engine to convert it back to electricity on demand, hours or days, later. This paper reports the first containment and pumping of silicon in a multipart graphite tank above 2000 & DEG;C, using material grades that are affordable for energy storage at GWh scales. Low cost molded graphite with particle sizes as large as 10 mu m successfully contained metallurgical grade silicon, even with as much as two-thirds iron by mass for up to 10 h and temperatures as high as 2300 & DEG;C, in tanks as large as two gallons.