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基于动态系统仿真软件TRNSYS开发了地埋管地源热泵系统性能预测软件。以山西省贺职地区一个铁路站房的地埋管地源热泵系统为例,利用该软件计算分析了埋管间距和埋管深度对地埋管地源热泵系统长期运行性能的影响。结果表明:不采用补热措施时,地埋管地源热泵系统在寒冷地区长期运行将导致土壤温度持续降低且无法自主恢复,热泵机组的制热量和COP持续降低,室温不保证时间逐渐增加。增大埋管间距和埋管深度可延缓土壤平均温度和系统供热性能的下降,但不能遏止地埋管地源热泵系统性能的衰减。
Based on the dynamic system simulation software TRNSYS, the ground source heat pump system performance prediction software was developed. Taking the buried ground source heat pump system of a railroad station building in Shanxi province as an example, the software was used to analyze the influence of buried pipe spacing and buried depth on the long-term operation performance of ground source heat pump system. The results show that when the heat recovery measures are not taken, the long-term operation of the ground source heat pump system in cold areas will lead to the continuous decrease of the soil temperature and the inability to recover spontaneously. The heating capacity and COP of the heat pump unit will continue to decrease, and the room temperature will not be guaranteed. Increasing the spacing of buried pipes and the depth of buried pipes can delay the decrease of average soil temperature and heating performance of the system, but can not prevent the attenuation of performance of ground-source heat pump system.