| Summary: | 碩士 === 國立高雄應用科技大學 === 模具工程系 === 103 === Solar radiation energy can significantly affect thermal field inside of a building. As the solar radiation passes through window glass and enters interiors, the incident angle of solar radiation energy is the key factor that influences the indoor temperature. Application of linearly patterned glass is able to change the incident angle of solar radiation energy when solar radiation passes through window glass and enters interiors. By building patterns on the exterior surface of glass and changing the incident angle, the interior solar heat can be effectively dissipated and so as the reduction of air conditioning load. Due to the outer surface of the linearly patterned glass giving geometric discontinuities, it will yield the stress concentration, where is around the corner of linearly pattern member. Therefore, this thesis employs a layer of flat glass on the outer surface of the linearly patterned glass to strength the patterned glass. Moreover, the thermal performance of the shielded patterned glass is also analyzed. Based on the results provided in the study, when the top edge size of trapezoidal pattern is smaller, and the interior solar heat dissipation can be increased. The temperature distribution over inner face of shielded trapezoidal patterned glass with 3 mm-top edge is able to be reduced 0.02℃compared with the shielded trapezoidal patterned glass with 6 mm-top edge. The average temperature distribution over the inner face of shielded trapezoidal patterned glass with 6 mm-top edge is reduced about 0.09℃compared with the shielded trapezoidal patterned glass with 12 mm-top edge. Moreover, numerical results give that, shielded triangular patterned glass yields the increase in the solar heat dissipations at interiors radiant energy, comparing with shielded flat glass . The temperature distribution over inner face of shielded triangular patterned glass reduced 0.99℃compared with the shielded flat glass. This study substantiates that the shielded patterned glass with non-zero slope surface patterns and making the top-edge size of patterned glass as small as possible help dissipate interior thermal energy due to solar radiation.
|
|---|
