A model for predicting the performance of the emitter in the solar thermophotovoltaic (STPV) system is presented in this article. The effect of non-parallelism of sun rays on concentration capability is numerically ca...A model for predicting the performance of the emitter in the solar thermophotovoltaic (STPV) system is presented in this article. The effect of non-parallelism of sun rays on concentration capability is numerically calculated,also the flow field in the emitter cavity and the temperature distribution of the emitter with different inlet conditions are compared. Numerical results show that free convection of the air inside the emitter cavity has great effect on the emitter temperature and may reduce the electricity output of the cells. At last,a new kind of selective film is put forward. Through optimizing the cut-off wavelength of a selective film,radiation loss is further reduced and system efficiency is improved.展开更多
该文提出了1种半透明光伏窗太阳得热系数(Solar heat gain coefficient,SHGC)的简易室外测试方法。首先通过室外实验研究了不同运行状态下半透明光伏窗的SHGC,实验结果表明,光伏窗开路(Open circuit,OC)状态下的SHGC显著高于最大功率点(...该文提出了1种半透明光伏窗太阳得热系数(Solar heat gain coefficient,SHGC)的简易室外测试方法。首先通过室外实验研究了不同运行状态下半透明光伏窗的SHGC,实验结果表明,光伏窗开路(Open circuit,OC)状态下的SHGC显著高于最大功率点(Maximum power point,MPP)状态下的SHGC,两者的SHGC差异最高可达11.5%;其次,通过理论分析研究了电池覆盖率对不同运行状态下光伏窗SHGC的影响,同时探究了不同类型光伏窗在上述2种运行状态下的SHGC差异。该文的分析结果将为更准确地评价光伏窗的热工性能和空调负荷计算提供指导,并推动光伏建筑一体化技术发展。展开更多
Micro/nanostructures play a key role in tuning the radiative properties of materials and have been applied to high-temperature energy conversion systems for improved performance.Among the various radiative properties,...Micro/nanostructures play a key role in tuning the radiative properties of materials and have been applied to high-temperature energy conversion systems for improved performance.Among the various radiative properties,spectral emittance is of integral importance for the design and analysis of materials that function as radiative absorbers or emitters.This paper presents an overview of the spectral emittance measurement techniques using both the direct and indirect methods.Besides,several micro/nanostructures are also introduced,and a special emphasis is placed on the emissometers developed for characterizing engineered micro/nanostructures in high-temperature applications(e.g.,solar energy conversion and thermophotovoltaic devices).In addition,both experimental facilities and measured results for different materials are summarized.Furthermore,future prospects in developing instrumentation and micro/nanostructured surfaces for practical applications are also outlined.This paper provides a comprehensive source of information for the application of micro/nanostructures in high-temperature energy conversion engineering.展开更多
基金Supported by the Natural Science Foundation of Jiangsu Province of China (Grant No. BK2007726)
文摘A model for predicting the performance of the emitter in the solar thermophotovoltaic (STPV) system is presented in this article. The effect of non-parallelism of sun rays on concentration capability is numerically calculated,also the flow field in the emitter cavity and the temperature distribution of the emitter with different inlet conditions are compared. Numerical results show that free convection of the air inside the emitter cavity has great effect on the emitter temperature and may reduce the electricity output of the cells. At last,a new kind of selective film is put forward. Through optimizing the cut-off wavelength of a selective film,radiation loss is further reduced and system efficiency is improved.
文摘该文提出了1种半透明光伏窗太阳得热系数(Solar heat gain coefficient,SHGC)的简易室外测试方法。首先通过室外实验研究了不同运行状态下半透明光伏窗的SHGC,实验结果表明,光伏窗开路(Open circuit,OC)状态下的SHGC显著高于最大功率点(Maximum power point,MPP)状态下的SHGC,两者的SHGC差异最高可达11.5%;其次,通过理论分析研究了电池覆盖率对不同运行状态下光伏窗SHGC的影响,同时探究了不同类型光伏窗在上述2种运行状态下的SHGC差异。该文的分析结果将为更准确地评价光伏窗的热工性能和空调负荷计算提供指导,并推动光伏建筑一体化技术发展。
基金This work was supported by the China Scholarship Council(No.201806320236)the Academic Award for Outstanding Doctoral Candidates of Zhejiang University(No.2018071)+1 种基金the Key Research and Development Program of Ningxia Hui Autonomous Region(No.2018BCE01004)the US Department of Energy's Office of Energy Efficiency and Renewable Energy(EERE)under the Solar Energy Technologies Office.
文摘Micro/nanostructures play a key role in tuning the radiative properties of materials and have been applied to high-temperature energy conversion systems for improved performance.Among the various radiative properties,spectral emittance is of integral importance for the design and analysis of materials that function as radiative absorbers or emitters.This paper presents an overview of the spectral emittance measurement techniques using both the direct and indirect methods.Besides,several micro/nanostructures are also introduced,and a special emphasis is placed on the emissometers developed for characterizing engineered micro/nanostructures in high-temperature applications(e.g.,solar energy conversion and thermophotovoltaic devices).In addition,both experimental facilities and measured results for different materials are summarized.Furthermore,future prospects in developing instrumentation and micro/nanostructured surfaces for practical applications are also outlined.This paper provides a comprehensive source of information for the application of micro/nanostructures in high-temperature energy conversion engineering.
