Improvement of indoor thermal environment of rural residences with coupled heating of attached sunspace and energy saving hot-wall

The attached sunspace and saving hot-wall was built in rural residences of Qingdao, which aims to improve the indoor thermal environment in winter. The variation regularity of indoor temperature with outdoor weather conditions was studied according to monitoring the data of experimental house, which was a coupled heating of attached sunspace and saving hot-wall combination and the contrast house with same structure, such as room temperature and outdoor temperature, etc. The results showed that the average air temperature in coupled heating house was higher than that in the contrast house by 10.1℃, and the maximum temperature difference reached 13.2℃, the lowest temperature difference was only 5.4℃. Through analysis of energy saving fraction, it was found that energy saving fraction of coupled heating house was high. It was feasible and economic to transform the attached sunspace and saving hot-wall in this area.