| 요약2 |
The cooling load of the top floor of a building will increase greatly due to the excessive solar radiation on the roof compared to other floors. The study selected solar reflectance, thermal emittance and insulation thickness as the thermal performance factors of the roof affecting the energy efficiency of the top floor of the building and conducted the sensitivity analysis. The result showed that the most significant thermal performance factors of the roof affecting the cooling load of the building were in the order of solar reflectance, thermal emittance, and insulation thickness. For solar reflectance and thermal emittance, the cooling load varied as the variables changed. For insulation thickness, however, the cooling load was not affected if the thickness was more than 150mm. In addition, the result of the sensitivity analysis on the thermal performance factors of the roof affecting the heating load showed that the significant factors were in the order of insulation thickness, thermal emittance, and solar reflectance. For the heating load of the top floor of the building, it showed that the value changed depending on the thickness of insulation and its effect on the heating load decreased before if the thickness was more than 210mm. |