| 요약2 |
The purpose of this study is to investigate the performance of reflective insulation system(RIS) and examine the thermal resistance of air space within various RIS. RIS is a type of thermal insulation with one or more reflective surface including one or more enclosed air space. In this study, the thermal resistances of single air space facing the reflective surface are 0.26㎡· K/W at 10 , 0.43㎡· K/W at 20㎜ and 0.45㎡· K/W at 30㎜ respectively. There is no difference in thermal resistance when the enclosed air space is facing single reflective surface or both reflective surfaces. The result shows that RIS with EPS(thermal conductance : 0.032W/m K) and reflective insulation materials can reduce the insulation thickness about 27% than EPS only. Because the insulation performance of RIS depends on the thickness and temperature of air space, direction of heat flux, emissivity of surface facing air space and so forth, the more detailed evaluation should be done before applying RIS. |