抄録
In order to increase an energy conversion efficiency of “Solar TEC” which is a thermionic energy converter driven by the solar light, the emitter should absorb the solar light with high rate. In the present paper, the emitter with light trap is proposed and the effective absorptivity αeff is numerically estimated. It is found that αeff is remarkably increased from 0.3 to 0.92 by adjusting the angle of a cone which is equipped inside the light trap to improve αeff, while an emissivity of the emitter ε remains original value. Moreover, the method to obtain αeff and ε experimentally was introduced.
