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1989
Conference Paper
Titel
Wärmetechnische Sanierung eines Einfamilienhauses in München mit transparenter Wärmedämmung. Vorversuch
Abstract
High energy savings in room heating can be achieved by the external application of new, highly transparent thermal insulation materials on massive house walls, which allow the heating losses from a building to be compensated by solar input, so that the facade can act as a heating element for the building. The operationanl feasibility of transparently insulated facade elements developed at the Fraunhofer-Institute for Solar Energy Systems - was tested as part of a building renovation programme in co-operation with the City of Munich. The building was a single-storey flat-roofed house, built of solid sandstone with a living area of 100 qm. Due to its inadequate thermal insulation, the house had a very high energy consumption and a low level of residential comfort resulting in cold exterior walls and high interior humidity values. The heating system renovation which was undertaken in the summer of 1988, included the following measures: - Mounting of eleven transparently insulated facade e lements with integrated heat-reflecting roller blinds on the south-western and north-western walls (total 40 qm), - Installation of double-glazed windows with integrated roller blinds, and - Improvement of the insulation on the north-eastern wall as well as in the basement and on the roof. The project is accompanied by a measurement programme from ISE for one year, to enable an evaluation of the effectiveness of the transparent insulation. For this purpose, the most significant temperatures, the heat flows and the insolation are continually recorded with a personal computer, which also controls the roller blinds according to climatological criteria. A detailed evaluation for the current heating period, with results on the efficiency, effective U-value and the heating energy saved, will be carried out during the coming months.