Partial Rarefaction as Way to Reduce Distortion Curve of double-glazed unit

Energy Management of Municipal Transportation Facilities and Transport - EMMFT 2017

Plotnikov, Alexander^1

Moscow State University of Civil Engineering, Yaroslavskoe shosse, 26, Moscow

129337, Russia^1

关键词: Air pressures;    Climate factors;    Engineering solutions;    Glazed surfaces;    Neighboring building;    Optical distortion;    Overpressure;    Urban environments;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/90/1/012127/pdf
DOI  :  10.1088/1755-1315/90/1/012127

来源: IOP

【 摘 要 】

Use of Insulated Glass Units (IGU) as glazing on building façades causes optical distortions of mirrored images of neighboring buildings in glazed surfaces. Optical distortions are caused by varying distances between glass panes in IGUs as a result of climate factors. This paper examines available engineering solutions that reduce such distortions: use of more rigid outer glasses, encasing the building in a shell of single glass panes, known as the 'double façade', and use of vacuum IGUs. A new way is proposed to reduce optical distortions by installing additional pointed or linear supports and creating pre-stress with partial rarefaction inside the IGU. Overpressure that can cause IGU expansion and glass deformation was calculated. In the urban environment of Moscow, reduction of air pressure with simultaneous increase of air pressure inside the IGU during summer heat waves can be as high as 5%, and this figure determines the level of rarefaction.