摘要
针对新型道路融雪化冰技术的太阳能路面集热和地下蓄能过程进行模型分析,研究逐年长期地能利用和热泵循环过程的基本性能。研究表明:运行5a后,有、无蓄能过程的热泵系统间COP相差达10%。其中,非蓄能条件下,地下均衡温度降低,热泵耗能增加,COP降低;采用集热蓄能,补偿地下热量缺失,可以达到地温恢复或增高,提升运行效能。此外,比较四孔和七孔地下换热器设置规模,两者间的流体最低温度相差2倍以上,孔数规模对地下温度、吸热量和热泵效能影响较大。因此,在地下换热器系统设计中,即要考虑孔数规模的经济性,又要保证热力性能。
The annually running performances of the HISM system with and without a SSC-UTES were investigated by us- ing the simulation computation. The results showed that the difference of heat pump COP （coefficient of performance） is about 10% between using SSC-UTES and not during 5 years. The SSC-UTES is very helpful to the HISM using ground source heat pump in a long-standing operation. It can supplement the thermal energy to the ground and increases the un- derground temperature and balances the loss of energy consumption. In addition, the example results indicated that there is a difference of two times between four and seven boreholes. The borehole amount of ground heat exchanger influences greatly on the ground temperature, the heat extracted from earth and the efficiency of heat pump. Thus, it is necessary to determine the borehole amount by considering the overall factors, such as investment, costs and performance.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2010年第7期845-850,共6页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(50776039)
关键词
太阳能利用
蓄能
道路融雪
传热分析
solar energy
thermal energy storage
road hydronic ice-snow melting
heat transfer
