Abstract
Performance of insulation glass is indicated in thermal transmittance of its center for department. But thermal transmittance of insulation glass increases so that the part of its circumference causes heat bridge. A measurement and calculation of theamal transmittance are carried out usually in a uniformity state of the coefficient of surface heat transfer on the cold and warm side. There is possibility changing by performance of insulation glass to surface coefficient of heat transfer. We carried out experiments for a purpose of the following matters. 1. Performance investigation of various kinds of glass. 2. Confirmation of influence range by heat bridge of circumference. 3. Examination of the performances on the center department and an end of insulation glass. 4. Confirmation of influence that performance of insulting glass and temperature difference causes to surface coefficient of heat transfer. The results were as follows: 1. Thermal transmittance of center department were 3.20W/(m^2・K) in 3+A6+3 insulating glass, 2.88W/(m^2・K) in 3+A12+3 insulating glass, 2.75W/(m^2・K) in 3+A18+3 insulating glass. 2. Line thermal transmittance of an end department was 0.044W/(m・K) in 3+A12+3 insulating glass. 3. Influence range by heat bridge of circumference was 5cm in 3+A12+3 insulating glass.
