The measuring device with combined evaluation software, which has been developed in the three-year research project, makes it possible to investigate the actual energy properties of complete windows in existing buildings, whereby the connections to the building structure are also taken into account. When there is a lack of or insufficient glazing data, this is determined using a mobile measuring device. The software tool enables individual windows or complete building facades to be recorded and assessed in terms of their energy efficiency. It is also intended that the measuring device and software can be deployed by users without any specific expertise in building physics: this should therefore enable specialist designers, appraisal experts and consultants from the window, facade and glazing industries to analyse and assess the window quality for the majority of building types and usages. A process for improving the quality assurance in the production of insulation glazing has also been developed. An optical measurement process enables very precise measurement of the inert gas fill level in the glazing cavity. The system functions in-line, i.e. during the ongoing production process, and takes just a few seconds. This makes it possible to achieve more reliable manufacturer specifications for the Ug-value.
Project description
The existing building stock currently contains more than 300 million windows whose thermal protection quality cannot keep pace with the currently available modern windows developed during the last 20 years. Those replacing windows dating back to before 1995 can therefore achieve considerable benefits in terms of the energy efficiency, comfort and security. However, with a refurbishment rate for existing buildings of just 1 to 2 per cent per year, in many cases a targeted window refurbishment would seem advisable even without complete renovation. Whether it is actually worthwhile refurbishing windows needs to be verified in each individual case. However, that is not actually very easy: whereas the thermal protection factor, i.e. the Ug-value, in newer existing glazing can generally be determined from the manufacturer’s specifications, the thermal value of older thermal insulation glazing is often a matter of conjecture.
It is only possible to determine the actual window quality and whether it makes sense to refurbish the windows from an energy efficiency and economic standpoint by carrying out an on-site analysis.
The measuring device with combined evaluation software, which has been developed in the three-year research project, makes it possible to investigate the actual energy properties of complete windows in existing buildings, whereby the connections to the building structure are also taken into account. When there is a lack of or insufficient glazing data, this is determined using a mobile measuring device. The software tool enables individual windows or complete building facades to be recorded and assessed in terms of their energy efficiency. It is also intended that the measuring device and software can be deployed by users without any specific expertise in building physics: this should therefore enable specialist designers, appraisal experts and consultants from the window, facade and glazing industries to analyse and assess the window quality for the majority of building types and usages. A process for improving the quality assurance in the production of insulation glazing has also been developed. An optical measurement process enables very precise measurement of the inert gas fill level in the glazing cavity. The system functions in-line, i.e. during the ongoing production process, and takes just a few seconds. This makes it possible to achieve more reliable manufacturer specifications for the Ug-value.Project descriptionThe existing building stock currently contains more than 300 million windows whose thermal protection quality cannot keep pace with the currently available modern windows developed during the last 20 years. Those replacing windows dating back to before 1995 can therefore achieve considerable benefits in terms of the energy efficiency, comfort and security. However, with a refurbishment rate for existing buildings of just 1 to 2 per cent per year, in many cases a targeted window refurbishment would seem advisable even without complete renovation. Whether it is actually worthwhile refurbishing windows needs to be verified in each individual case. However, that is not actually very easy: whereas the thermal protection factor, i.e. the Ug-value, in newer existing glazing can generally be determined from the manufacturer’s specifications, the thermal value of older thermal insulation glazing is often a matter of conjecture.It is only possible to determine the actual window quality and whether it makes sense to refurbish the windows from an energy efficiency and economic standpoint by carrying out an on-site analysis.
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