Abstract
Rural houses in severe cold areas of China are mostly single-storey independent buildings with large shape coefficient. Compared with urban residential, it has larger contact area between envelope and outdoor environment of each household. Meanwhile, the heat transfer coefficient of window is usually greater than that of external wall and roof. The window-wall ratio is one of the important indicators affecting the energy consumption of rural house. This paper takes window-wall ratio as the main variable, building orientation, thermal performance of envelope and window heat transfer coefficient as the auxiliary variables, and applies DesignBuilder software to quantitatively analyse the mechanism of window-wall ratio on rural house’s heating energy consumption under the interactive influence of multiple factors. Results show that the influence rule of window-wall ratio with different orientations on heating energy consumption will change when the thermal performance of envelope or window heat transfer coefficient changed. The synthetic effect of various factors should be considered in the design to reasonably determine the windowwall ratio of rural house.
Highlights
Under the background of vigorously promoting green building [1], the study of building low-energy design is of great significance
When the U-value is 1.0, the energy consumption decreases with the increase of window-wall ratio
As the U-value decreases, the energy consumption decreases with the increase of window-wall ratio, and the changing range gradually increases
Summary
Under the background of vigorously promoting green building [1], the study of building low-energy design is of great significance. The rural houses’ area of China accounts for more than 50% of total building area, and its energy consumption is higher than that of urban residential. According to the
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