地源热泵的地埋管群换热特性研究
Heat transfer characteristics of underground heat exchanger group in ground-source heat pump systems
摘要：
结合武汉某实际工程的地埋管群阵列布置情况和地源热泵系统的运行情况，对典型区域的地埋管群运行5年中的埋管换热特性进行了动态数值模拟和分析。提出了温度偏离度和换热保证度的概念，并研究了二者在地源热泵长期运行过程中的变化规律。建议尽量减小冷热负荷不平衡率，以保证地源热泵系统稳定可靠的运行。
Abstract：
Based on the arrangement of the underground heat exchanger group and the operation conditions of the ground-source heat pump system of an actual project in Wuhan, performs a dynamic numerical simulation and analysis of the heat transfer characteristics of the underground heat exchanger group during a five-year operation period in typical zones. Presents the concepts of temperature deviation degree and heat transfer assurance factor, and studies their variation in a long term operation process of ground-source heat pump systems. Proposes that the imbalance rate between cooling and heating load should be reduced as much as possible to ensure the stability and reliability of ground-source heat pump system operation.
Keywords:ground-source heat pump, temperature deviation degree, heat transfer assurance factor, load imbalance rate