地源水分级供热系统构思与案例分析

发布时间：2018-05-06 22:27

  本文选题：供热 + 低温热水　； 参考：《暖通空调》2016年12期

【摘要】：为充分利用地源水冬季温度较高的特征以及室内热环境的非均匀性来提高能效,提出了地源水分级供热系统,即部分地源热量直接用于加热围护结构、减少室内直接散热量,部分地源热量则通过热泵提升品位后承担剩余部分负荷。选取北京一幢典型玻璃幕墙建筑,以地埋管地源热泵为例,构建了传热数值计算模型和能耗计算方法,分析了该系统在整个供暖季的逐时性能。结果表明:分级供热系统可以提高窗户平均温度2.3℃并降低16.8%的累计热负荷和33.1%的尖峰热负荷;由于地源水的直接利用无需机组能耗,该系统节能率达13.0%,初投资不变而运行费用有效降低。在室外温度较低时,负荷降低效果将更显著。此外,因该系统的末端应用于窗户,所以其适用于窗墙面积比较大的建筑。
[Abstract]:In order to make full use of the characteristics of high temperature in winter and the non-uniformity of indoor thermal environment to improve energy efficiency, this paper puts forward a classified heating system of ground source water, that is, part of ground source heat is directly used to heat the enclosure structure and to reduce the indoor direct heat loss. Part of the heat source heat through the heat pump to enhance the grade of the remaining part of the load. Taking a typical glass curtain wall building in Beijing as an example, a numerical heat transfer model and a method for calculating energy consumption are constructed, and the hourly performance of the system in the whole heating season is analyzed. The results show that the average temperature of windows can be increased by 2.3 鈩，

本文编号：1854191