针对夏热冬冷地区建筑夏季空调冷负荷往往大于冬季空调供暖负荷,采用地源热泵系统容易产生土壤“热堆积”问题,提出了一种利用冷却塔过渡季节土壤补偿蓄冷的新型混合式土壤源热泵系统;并根据地埋管换热器有限长线热源理论、热流叠加原理、冷却塔热湿交换原理,构建了关于该系统的热工性能评价模型;进一步以中国南京地区某住宅小区土壤源热泵系统为应用案例,将所提出的系统与传统的单一土壤源热泵系统进行了比较分析。结果表明,所提出的基于冷却塔过渡季节土壤补偿蓄冷的混合式土壤源热泵系统土壤热恢复方法,可有效缓解由于系统向地下土壤全年排热与取热不平衡而导致的土壤“热堆积”问题,研究结果可为地源热泵技术在夏热冬冷地区的高效应用提供优化设计与节能运行参考。
In order to solve the heat accumulation problem of ground-source heat pump(GSHP) system in cooling load dominated area, this paper presents a novel hybrid ground-source heat pump (HGSHP)system based on cooling tower (CT) cool-storage in transition season. The thermal performance evaluation model for HGSHP system is built using ground heat exchanger (GHE) multiple borehole finite line heat source model, heat and humidity transfer model and superposition principle. Then an actual project in Nanjing is ehosento discussthe thermal performance of novel HGSHP system. The results show that using novel HGSHP system, the heat accumulation problem can he well solved.