热光伏效率为40
Alina LaPotin1, Kevin L Schulte2, Myles A Steiner2
1Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA.
Nature
|April 14, 2022
概括
研究人员开发了新的热光伏电池 (TPV), 这些高带间隔的合电池利用光谱过和反射器,为高效的热能存储和电网脱碳铺平了道路.
科学领域:
- 能源转化和储存
- 材料科学
- 太阳能发电
背景情况:
- 热光伏 (TPV) 通过光伏效应将红外光转化为电力,为高温储能和转化提供了潜力.
- 尽管理论上的效率超过了50%,但在1300°C以下的温度下,已证明TPV的效率仅为32%.
- 之前的TPV在2000°C时使用集成的背面反射器和发射器达到29%的效率.
研究的目的:
- 制造和测量优化用于高温操作 (1,900-2,400°C) 的高带间隔并联TPV电池的效率.
- 证明TPV电池的效率超过40%,并评估它们在热电网储能应用中的潜力.
主要方法:
- 使用III-V材料制造的双连接TPV电池,带间距在1.0至1.4 eV之间.
- 使用带边光谱过来优化用于高发射温度的电池 (1,900-2,400°C).
- 实施高度反射的背面反射器,以拒绝向发射器返回的子频段间隙辐射.
主要成果:
- 一个1.4/1.2 eV的TPV装置在2400°C达到41.1%的最大效率,功率密度为2.39W/cm2.
- 一个1.2/1.0 eVTPV装置在2,127°C时达到39.3%的最大效率,功率密度为1.8W/cm2.
- 在高带间隔的TPV电池中实验性地证明了高效率.
结论:
- 开发的高带间隔并联TPV电池显示效率超过40%,显著推进了该领域.
- 这些TPV电池适合集成到热能电网储能系统中,使可发送可再生能源成为可能.
- 这项研究为实现热能存储的高效和低成本提供了途径, 这对于电网脱碳至关重要.
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