摘要
研究了跨季节蓄热地源热泵系统(GCHPSS)土壤蓄热体温度场的变化规律,编写VB程序对地下埋管土壤蓄热进行了模拟计算。结果表明:当单U型竖直埋管蓄热时,土壤日蓄热量、热作用半径和平均蓄热率在初始阶段急剧变化,然后缓慢减小并最后趋于稳定,蓄热量也趋于平衡。当管群蓄热时,蓄热系统运行1个循环周期(1a)后,土壤的温度场基本上可以恢复平衡,恢复后较蓄热开始时升高0.5～1.0℃。通过对不同地区3种典型土壤的蓄热进行比较,得出粘土是一种性能良好的长期储能介质。同时,地下埋管土壤蓄热特性的实验研究为GCHPSS系统的推广应用提供设计依据。
The temperature distribution of soil heat storage in ground-coupled heat pump with seasonal storage （GCHPSS） was analyzed. Computer program was developed to simulate the underground borehole heat storage. The simulation results show that the heat storage quantity per day, thermal influenced radius, average heat storage efficiency in the single U- tube borehole heat storage change rapidly at first, then reduce slowly and tend to be stable, and the oil temperature dis- tribution, too. It has also been demonstrated that clay is a kind of better long-tenn heat storage media. The seasonal thermal energy storage experiments of U-tube boreholes provide valuable design foundation for practical applications of the GCHPSS system.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2008年第8期920-926,共7页
Acta Energiae Solaris Sinica
基金
国家“十一五”科技支撑计划重大项目(2GG6BAJ03AG6)
天津市社会发展科技计划项目(06YFSYSF03600)
辽宁工程技术大学青年基金(06A13)
关键词
跨季节蓄热
地源热泵
地下蓄热
埋管换热器
土壤温度场分布
ground coupled heat pump
seasonal thermal energy storage
underground heat storage
borehole heat exchanger
soil temperature distribution
