Abstract
How to create a healthy and comfortable indoor environment without causing a substantial increase in energy consumption has become a strategic problem that the development of all countries must face and solve. According to the climatic conditions of Qinba Mountains in China, combined with the characteristics of local rural residential buildings and residents’ living habits, the field survey and theoretical analysis were used to study the thermal environment status and the heating energy consumption condition of local rural residential buildings. The thermal design method of walls for the local rural energy-saving buildings based on the indoor uniform radiation field was explored by using the outdoor comprehensive temperature function expressed by the fourth-order harmonic Fourier series as the boundary condition of the wall thermal analysis. ANSYS CFX was adopted to study the suitability of the energy-saving wall structure designed by the above method. The results show that the indoor thermal environment of local rural residential buildings in winter is not ideal and the heating energy consumption is high, but this area has the geographical advantage to develop solar energy buildings. It is proposed that the indoor thermal comfort temperature of local rural residential buildings in winter should not be lower than 14°C. When the internal surface temperature of the external walls in different orientations are equally based on the design principle of uniform radiation field, the heat transfer coefficient of the east wall, the west wall, and the north wall of the local rural residential buildings is 1.13 times, 1.06 times, and 1.14 times of the south wall heat transfer coefficient, respectively. The energy-saving structural wall with KPI porous brick as the main material and the south wall heat transfer coefficient of 0.9 W/(m2·K) is the most suitable energy-saving wall for local rural residential buildings.
Highlights
Many research studies have shown that good environmental conditions can enhance people’s productivity and happiness [1,2,3,4]
According to the climate conditions of Qinba mountains, combined with the characteristics of rural residential buildings and the living habits of residents in Ankang area, the field survey and theoretical analysis were used to study the indoor and outdoor thermal environment status and the heating energy consumption condition of local rural residential buildings and explore the thermal design method of walls for the local rural energy-saving buildings based on the indoor uniform radiation field
Results and Analysis. e energy-saving walls with the same heat transfer coefficient but different construction methods or construction materials have different storage and release capacity for heat energy. erefore, this paper studies the structural suitability of energy-saving wall through the analysis of indoor temperature field
Summary
Many research studies have shown that good environmental conditions can enhance people’s productivity and happiness [1,2,3,4]. Erefore, it is an important measure to reduce the building energy consumption and improve the indoor thermal environment of the rural residential buildings by reasonably controlling the thermal parameters, construction methods, and construction materials of the external walls according to the specific climatic conditions, building characteristics, and residents’ living habits. According to the climate conditions of Qinba mountains, combined with the characteristics of rural residential buildings and the living habits of residents in Ankang area, the field survey and theoretical analysis were used to study the indoor and outdoor thermal environment status and the heating energy consumption condition of local rural residential buildings and explore the thermal design method of walls for the local rural energy-saving buildings based on the indoor uniform radiation field. This area is rich in solar energy resources and has the potential to develop solar energy buildings
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