| Summary: | 碩士 === 朝陽科技大學 === 建築系建築及都市設計碩博士班 === 107 === Recent years, under the trend of reducing carbon footprint buildings, many designers in Taiwan had chosen weather resistant coating as exterior wall material instead of the use of tiles. The carbon emissions of weather resistant coating are only 43% of traditional tiles per unit. This material has the advantage of low carbon emission, economy, water proof and heat insulation, it has more benefits to the environment. In order to understand the performance of weather resistant coating, we set up two 15cm RC wall as experimental modules, then we applied traditional tiles and weather resistant coating separately each module. The physical quantity was then measured by relevant instrument.
According to the data of the experiment the difference of temperature between traditional tiles and weather resistant coating, the difference of temperature of inner and outer surface can be reduced to 1.8and4.9℃ respectively. However, when the exterior wall coating A or coating B, the density and material thickness are lower than that of the tile, so that the heat cannot be stored inside the structure, and the heat directly enters and exits the structure, so the heat flow value is higher than that of the tile, and the heat flow value is higher than that of the tile. The data of stable period were calculated, it can be known that the heat transmission rate Ui is higher than the theoretical value: tile (3.67) < coating B (4.39) < coating A (4.66) [W/(m2.k)].
The measured Ui value were enter into a software (eQUEST), and was modified according to the building energy density index EUI value. The simulation results show that when the traditional tiles changed into weather resistant coating or coating A or coating B, the north-south and south respectively increase: 5.2%, 22.2%, 32.4%; the grid shade can be reduced in the north- south and south respectively: 8.5%, 13.9%, 14.6% load, showing that the lower the latitude, the higher the heat load of the cold room, and the better the insulation improvement after adding the sunshade.
Finally, the comparison of carbon footprint (per unit) and life cycle of exterior wall insulation between traditional tiles, cement paint and weather resistant coating were discussed. The final cumulative carbon emissions are divided into: Tile (53.1)< Insulation coating (61.56)<Cement paint (110.88) [kgCO2e/m2], the total numbers of repair were affected due to the difference of materials. The conclusion is, the carbon footprint (per unit) of weather resistant coating were16% higher than traditional tiles, but the traditional cement paint were twice as high as the traditional tiles, it is unfriendly to the environment.
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