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Thermal energy grid storage using multi-junction photovoltaics†
Energy & Environmental Science ( IF 32.5 ) Pub Date : 2018-11-19 00:00:00 , DOI: 10.1039/c8ee02341g Caleb Amy 1, 2, 3, 4 , Hamid Reza Seyf 4, 5, 6, 7 , Myles A. Steiner 4, 8, 9 , Daniel J. Friedman 4, 8, 9 , Asegun Henry 1, 2, 3, 4, 5
Energy & Environmental Science ( IF 32.5 ) Pub Date : 2018-11-19 00:00:00 , DOI: 10.1039/c8ee02341g Caleb Amy 1, 2, 3, 4 , Hamid Reza Seyf 4, 5, 6, 7 , Myles A. Steiner 4, 8, 9 , Daniel J. Friedman 4, 8, 9 , Asegun Henry 1, 2, 3, 4, 5
Affiliation
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 renewables to provide this availability, but there is no clear technology that can meet the low cost needed. Thus, we introduce a concept termed thermal energy grid storage, which in this embodiment uses multi-junction photovoltaics as a heat engine. We report promising initial experimental results that suggest it is feasible and could meet the low cost required to reach full penetration of renewables. The approach exploits an important tradeoff between the realization of an extremely low cost per unit energy stored, by storing heat instead of electricity directly, and paying the penalty of a lower round trip efficiency. To understand why this tradeoff is advantageous, we first introduce a general framework for evaluating storage technologies that treats round trip efficiency, as well as cost per unit energy and power, as variables.
中文翻译:
使用多结光伏电池的热能网格存储†
由于可再生能源的成本低于化石燃料,因此广泛的可持续用电的主要障碍已成为按需供应。能量存储可以使可再生能源提供这种可用性,但是尚无明确的技术可以满足所需的低成本。因此,我们引入了称为热能网格存储的概念,该概念在本实施例中使用多结光伏电池作为热机。我们报告了令人鼓舞的初步实验结果,这些结果表明这是可行的,并且可以满足实现可再生能源全面渗透所需的低成本。该方法利用了一种重要的权衡,即通过直接存储热量而不是电能来实现单位存储能量的极低成本,以及降低往返效率的代价。要了解为什么这种权衡是有利的,
更新日期:2018-11-19
中文翻译:
使用多结光伏电池的热能网格存储†
由于可再生能源的成本低于化石燃料,因此广泛的可持续用电的主要障碍已成为按需供应。能量存储可以使可再生能源提供这种可用性,但是尚无明确的技术可以满足所需的低成本。因此,我们引入了称为热能网格存储的概念,该概念在本实施例中使用多结光伏电池作为热机。我们报告了令人鼓舞的初步实验结果,这些结果表明这是可行的,并且可以满足实现可再生能源全面渗透所需的低成本。该方法利用了一种重要的权衡,即通过直接存储热量而不是电能来实现单位存储能量的极低成本,以及降低往返效率的代价。要了解为什么这种权衡是有利的,