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通过搭建Fluent/Matlab协同仿真模型,将地上热泵系统与地下抽灌井群连接起来,动态地研究制冷时长对热泵性能参数的影响。研究表明,制冷时长不同,地下温度场的变化程度也不同,从供暖角度分析,制冷期越长,制冷机组COP及系统的能效比越大,冬季系统运行效果越好,地下含水层冷水锋面与热水锋面的中和越明显,对热贯通的阻滞效果越好,对地下含水层温度场修复效果越明显。但从制冷角度分析,制冷时长越短抽水温度越低,对制冷越有利。因此,制冷时长的影响应综合分析。
By building a Fluent / Matlab co-simulation model, the ground-based heat pump system is connected with the underground pumping and pumping well group to dynamically study the influence of cooling time on the performance parameters of the heat pump. The results show that the cooling time is different, and the variation degree of underground temperature field is also different. From the point of view of heating, the longer the cooling period, the larger the energy efficiency ratio of COP and system is, the better the winter system operation effect is. The neutralization of the hot water front is more obvious, and the better the blocking effect on the heat penetration is, the more obvious is the repair effect on the temperature field of the underground aquifer. However, from the cooling point of view, the shorter the cooling time, the lower the pumping temperature, the more favorable the cooling. Therefore, the impact of cooling time should be comprehensive analysis.