| 요약2 |
Low-E insulation has enclosed reflective air spaces between aluminum foils which have very low emissivity. The reflective air spaces are composed of optimum-sized air cells which are enclosed by polyethylene foam. The critical difference between Low-E insulation and conventional reflective insulations is the presence of a honey-comb structure formed from polyethylene that serves as the core material. Low-E insulation has foil surface emissivity of 0.04 with enclosed air cells between foils. Its core material is 35 times foamed polyethylene foam which is expanded to make air cells. The enclosed air cells with foil reduce convective and radiative heat transfer. To verify the high efficiency of Low-E insulation, it has been tested by an accredited laboratory designated by the Korean government. The overall thermal transmittance tests were conducted for the Low-Emissivity Insulation of various thickness specimens. The thicknesses of the specimens were 10, 20, 30, 40, 50, 60, 80, and 100mm. Based on the test results, its insulating characteristics were investigated using trial & error method. |