城镇老旧小区能耗优化研究及冬季舒适度分析

Energy consumption optimization and analysis of winter comfort degree in old town residential area

以郑州市某老旧小区为研究对象,建立结构模型,对外围护结构进行节能改造,分析改造后对冬季热舒适度的影响。结果表明,单独改造屋面、外窗会使冷、热负荷同时减小;只改造外墙时,热负荷减小的同时冷负荷增加,起到夏季反节能作用。改造后热负荷下降最明显,为88.87%,冷负荷下降不明显,为15.8%,综合节能率达到61.47%。分析改造前后的冬季自然室温,发现围护结构的改造对高楼层及北向房间室温的提升更大。改造后热舒适小时数增加,舒适率最高可提升至92.18%,中间楼层及房间舒适率提升效果最显著;南北朝向不同对自然室温及室温提升率影响大,东西朝向对自然室温及室温提升率的影响可忽略不计。

Taking an old residential area in Zhengzhou as the research object,the structure model is established to carry out energy-saving transformation of the peripheral protection structure,and the influence of the transformation on the thermal comfort degree in winter is analyzed.The results show that both cooling and heating loads can be reduced by modifying roofs and windows independently;When only the outer wall is reconstructed,the cooling load increases while the heating load decreases,which plays a role of anti-energy saving in summer.After the renovation,the heat load decreased most significantly,which was 88.87%,while the cooling load decreased less significantly,which was 15.8%,and the comprehensive energy saving rate reached 61.47%.After analyzing the natural room temperature before and after the reconstruction,it is found that the reformation of the enclosure structure improves the room temperature of the high-rise floor and the northward room.After the renovation,the number of thermal comfort hours increased,and the comfort rate could be increased to a maximum of 92.18%.The improvement of comfort rate in intermediate floors and rooms was the most significant.Different north and south directions have a great influence on the natural room temperature and room temperature rising rate,while the east-west orientation has a negligible effect on the natural room temperature and room temperature rising rate.