Energy harvesting from sun and outer space using thermoradiative devices(TRDs),despite being promising renewable energy sources,is limited only to daytime and nighttime period,respectively.Such a system with 24-hour c...Energy harvesting from sun and outer space using thermoradiative devices(TRDs),despite being promising renewable energy sources,is limited only to daytime and nighttime period,respectively.Such a system with 24-hour continuous electric power generation remains an open question thus far.Here,a TRD-based power generator that harvests solar energy via concentrated solar irradiation during daytime and via thermal infrared emission towards the outer space at nighttime is proposed,thus achieving the much sought-after 24-hour electrical power generation.Correspondingly,a rigorous thermodynamical model is developed to investigate the all-day performance characteristics,parametric optimum design,and the role of various energy loss mechanisms.The calculated results predict that the daytime TRD-based system yields a peak efficiency of 12.6%under 10 suns,thus sig-nificantly outperforming the state-of-art record-setting solar thermoelectric generator.This work reveals the potential of TRD towards 24-hour electricity generation and future renewable energy technology.展开更多
基金supported by the Fundamental Research Funds for the Central Universities of China(Grant No.JUSRP121049)the National Natural Science Foundation of China(Grant No.12075197)。
文摘Energy harvesting from sun and outer space using thermoradiative devices(TRDs),despite being promising renewable energy sources,is limited only to daytime and nighttime period,respectively.Such a system with 24-hour continuous electric power generation remains an open question thus far.Here,a TRD-based power generator that harvests solar energy via concentrated solar irradiation during daytime and via thermal infrared emission towards the outer space at nighttime is proposed,thus achieving the much sought-after 24-hour electrical power generation.Correspondingly,a rigorous thermodynamical model is developed to investigate the all-day performance characteristics,parametric optimum design,and the role of various energy loss mechanisms.The calculated results predict that the daytime TRD-based system yields a peak efficiency of 12.6%under 10 suns,thus sig-nificantly outperforming the state-of-art record-setting solar thermoelectric generator.This work reveals the potential of TRD towards 24-hour electricity generation and future renewable energy technology.
