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|Title alternative ||:||Study of field simple measurement and simple evaluation method on the thermal performance of opening|
|Authors ||:||田代, 達一郎|
|Authors alternative ||:||TASHIRO, Tatsuichiro|
|Issue Date ||:||23-Mar-2012 |
|Abstract ||:||With the aim to enable more precise assessment of thermal load calculation, this thesis summarizes the methods for evaluating, from the perspectives of calculation and measurement, the solar shading performance against oblique incidence in a way that takes into account the frame impact and the multiple reflections of the glasses, which currently have not been considered.|
Chapter 1 outlines the background and purpose of this research. It includes a literature review and describes the physical theories to be used in this study.
Chapter2 describes a detailed calculating method for solar heat gain coefficient (SHGC) at a window opening considering window frame at the time of oblique incidence. Direct solar radiation component was calculated by taking account of incident angle characteristics of the glass, influence of heat reception due to the difference in frame color and that of shadow on the glass surface cast from the frame, in case of insolation which was received on the window surface by both vertical and oblique incidence. As the result, it has been proved that influence of heat reception due to difference in frame color doesn’t have to be taken in to account for the calculation, since it is negligible. Diffuse solar radiation component was found that less than approximately 0.81 times of that obtained by vertical incidence as a result of incident angle calculation by hemispheric integration, while considering the characteristics of window which is mounted vertically against the ground.
Chapter3 describes an apparatus which is able to easily measure SHGC for oblique incidence on the field by using actual product. Even though there was some difference between the results of measurement and calculation since not all phenomena were measured in detail, it has been proved that a tendency similar to the case of calculation appears on measurement result data. The result indicates that it is acceptable to use the calculating method for both direct solar radiation component and diffuse solar radiation component. Further, we’ve performed comparison with theoretical calculation by organizing heat transmission coefficient (U-Value), radiative heat transfer coefficient and the like from field measurement data.
Chapter 4 as a non- window opening, describes the calculation method for the thermal performance of curtain wall considering frame. Because there are no established international standards, was examined on the basis of European standards about how to take the heat transfer area and the scope of the analysis model. Also, the calculation method of the generic window frames was applied to curtain wall frames, examined how to calculate the heat shield performance and thermal insulation performance. After considering six different frame structures, spandrel panels with openings, showed that there are common trends, respectively.
Chapter 5 describes a simplified calculation method, can be used to calculate the heat load of the building's curtain wall frame. Based on detailed calculations in Chapter 4, we proposed a simplified calculation method. Moreover, SHGC of the waist, because it consists of a glass surface, SHGC calculation of the wall in the PAL has been underestimated. Therefore, we proposed a simplified calculation method for the glass curtain wall. The difference between detailed calculation method and Simplified calculation method, showed that within a few %.
In Chapter 6, about curtain wall, describe similar to calculation method for oblique incidence in Chapter 2. Curtain wall, as much as possible because they tend to flatten the surface of the frame and glass, drop shadow effect in the opening frame is small, and showed that the calculations do not have to consider. In a case that sun-shading member is used, it has also been proved that sunshade effect calculating formula may be used as it is for direct solar radiation component comparing with that used for PAL calculation.
Chapter 7 using the results of Chapter 2 and Chapter 6, the heat penetration by region, compared with the calculation method has been used in traditional simulation. When considering the oblique and frame, confirmed the impact of the building heat load calculations.
Chapter 8 the results of this study are summarized and avenues for future research on this topic are discussed.
|Type Local ||:||学位論文|
|Appears in Collections||:||理工学研究科・博士論文|