论文标题
通过最佳辐射冷却发电最大的夜间电力发电
Maximal nighttime electrical power generation via optimal radiative cooling
论文作者
论文摘要
我们提出了利用辐射冷却的夜间热电发电系统的系统优化。我们表明，使用现有技术可以实现2 W/m2的电源密度，比先前报道的实验结果高两个数量级。该系统结合了辐射冷却和热电发电，并在太阳能收获不可用时在晚上运行。当实现此最佳发电时，热电发电机（TEG）本身覆盖了系统足迹区域的1％，显示出经济可行性。我们研究发射光谱，热对流，功绩热电图以及TEG和辐射冷却器之间的面积比对发电性能的影响。我们优化了寒冷一面附加的热辐射发射极，并提出了实用的实现。与常规黑体发射器相比，功率密度的增益153％可以阐明最佳发射极的重要性。
We present a systematic optimization of nighttime thermoelectric power generation system utilizing radiative cooling. We show that an electrical power density over 2 W/m2, two orders of magnitude higher than the previously reported experimental result, is achievable using existing technologies. This system combines radiative cooling and thermoelectric power generation and operates at night when solar energy harvesting is unavailable. The thermoelectric power generator (TEG) itself covers less than 1 percent of the system footprint area when achieving this optimal power generation, showing economic feasibility. We study the influence of emissivity spectra, thermal convection, thermoelectric figure of merit and the area ratio between the TEG and the radiative cooler on the power generation performance. We optimize the thermal radiation emitter attached to the cold side and propose practical material implementation. The importance of the optimal emitter is elucidated by the gain of 153% in power density compared to regular blackbody emitters.
