산란 일사와 그림자 효과에 따른 진공관형 태양열 집열기의 성능 변화

초록

The thermal performances of glass evacuated tube solar collectors are investigated. Four different shapes of solar collectors are considered and the performances of these solar collectors are numerically investigated. The solar irradiation consists of the beam radiation as well as the diffuse radiation. Also, in actual system, the interference of solar irradiation and heat transfer interaction between the tubes should be considered. Therefore, this study considered these effects is carried out experimentally and numerically for the prototype solar collector. The accuracy of the numerical model verified by experiments. The result shows that the thermal performance of the absorber used a plate fin and U-tube is about 25% better than thouse of the other models.