Abstract
The envelope of rural buildings has been lack of effective and reasonable thermal insulation method and therefore its energy consumption has always been high. In order to address this problem, this paper aims to optimize the thermal design of building envelope. The simulation using DesignBuilder software for modeling and analyzing, using the orthogonal experimental design method to study the effects of external wall, external window and roof on heating load, and optimal thermal insulation scheme was obtained, which was 100mm PUF (external wall), 6mm+12mm+6mm low-E glass (external window) and 100mm PUF (roof). Results revealed that the addition of sunspace can significantly reduce the heating load and thus the selection of window thermal insulation material is very important. Compared with the condition of highest heating load, the energy-efficient rate of optimal scheme reached to 21.4%. The results of this study will serve as the idea for optimal design of rural buildings envelope.
Highlights
Energy issue, in buildings is always a worldwide problem
Heating Ventilation and Air Conditioning (HVAC) systems is widely used in buildings, its energy consumption is enormous affected by a number of factors such as operation strategies and climate change
From the results obtained in the previous section, the following conclusions may be drawn: 1. The energy-efficient potential of rural building is enormous and the selection of building envelope is important in early design states
Summary
In buildings is always a worldwide problem. More and more energy has been consumed in buildings due to the development of buildings area [1]. In China, there are about 37% of total national building energy is consumed in rural areas. It is significant for rural area to optimize building envelope and develop energy-efficient buildings. In order to address energy savings problem, many researchers focused on active strategies to reducing energy consumption. Heating Ventilation and Air Conditioning (HVAC) systems is widely used in buildings, its energy consumption is enormous affected by a number of factors such as operation strategies and climate change. Lighting technology plays an increasingly important role in reducing energy consumption. Makaremi et al [6] investigated the effects of applying different design strategies on lighting energy use and visual comfort level and found that there is no single design solution to guarantee both low energy demand and high visual quality, integrating different strategies based on the type of task and the occupant’s activities is highly recommended
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