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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 model analysis of solar road surface heat collection and underground energy storage process based on the new road melting snow melting technology is carried out to study the long-term utilization and the basic performance of heat pump cycle. The results show that after running 5a, there is a difference of 10% between the heat pump systems without and with energy storage. Under non-storage conditions, the underground equilibrium temperature is decreased, the heat pump energy consumption is increased, and the COP is decreased. With the collection of heat storage and compensation for the lack of underground heat, the ground temperature can be recovered or increased and the operating efficiency can be improved. In addition, comparing the four-hole and seven-hole underground heat exchangers setting scale, the lowest temperature difference between the two fluids is more than 2 times, and the number of holes affects the underground temperature, heat absorption and heat pump efficiency greatly. Therefore, underground heat exchanger system design, that is, to consider the size of the hole economy, but also to ensure that the thermal performance.