Design of spectral split PV-TEG hybrid system in outer space

Abstract A novel PV-TEG hybrid system applied in outer space is designed, and relevant physical and numerical models are established to study the effects of cut-off wavelength ( λ c) and concentration ratio ( CR ) on the output behaviors of separate PV module, TEG module, and PV-TEG hybrid system. Combining the changing patterns of the output characteristics of PV and TEG modules in terms of λ c and CR , it is concluded that the hybrid system achieves a 20.1% increase in the maximum electrical power density in comparison to a separate PV module. In outer space, the novel PV-TEG hybrid system significantly improves the output behavior compared with a single PV cell and can provide technical support for converting space solar energy into electricity.