The influence of building zones with different dynamic properties on the building energy performance

[摘要] The paper presents an analysis of the energy performance of single-family buildings with two zones differing in dynamic properties. The procedure currently applied for determining the energy performance distinguishes several cases in which a division into separate calculation zones is required, whereas none of them sanctions dissimilarities of dynamic properties between parts of buildings. In order to determine the differences resulting from the separation into zones, e.g. the ground floor with a heavy structure and a lightweight usable attic, the monthly balance method was used as legally binding for establishing energy performance of buildings. Heat demand for heating and cooling a building was determined. The results obtained for a building treated as one zone and divided into two zones were compared. The analysis was carried out in a variant manner, i.e. assuming varying internal thermal capacity, usable space, surface of glazed partitions, and air exchange rate, for 59 locations in Poland. It was shown that, under assumption of the same useful area of upper and lower storey, in cases taken into consideration the maximal difference in energy demand for heating only is 5.41% (Nowy Scz), but in cooling can reach as much as 46.75% (Zakopane).

[发布机构] Institute of Heat Engineering, Faculty of Power and Aeronautical Engineering, Warsaw University of Technology, Nowowiejska 21/25, Warsaw; 00-665, Poland^1

[学科分类] 土木及结构工程学

[关键词] Air exchange rates;Balance methods;Building energy performance;Building zones;Dynamic property;Energy performance;Energy performance of buildings;Heating and cooling