中深层地埋管热泵供热系统运行特性实测研究
Field test and analysis on operation characteristics of medium-depth buried pipe heat pump heating systems
摘要：
通过大量工程实测研究,总结了中深层地埋管热泵供热技术的运行特性。中深层地埋管具有出水温度高、取热功率大、长期运行稳定的特点,为热泵系统提供了高品位的低温热源,以提升其运行性能;同时中深层地埋管自身存在间歇蓄热特性,能很好地满足建筑供热需求变化与柔性用能;无级变频热泵机组更适合与中深层地埋管匹配运行,节能减排效果显著;热源侧水系统具有小流量、大扬程,且阻力随着流量变化而大幅度变化的特性。研究结果可为提升该技术的供热性能提供关键指导。
Abstract：
In this paper, the operation characteristics of the medium-depth buried pipe heat pump heating technology are summarized through a large number of engineering field research. The medium-depth buried pipe has the characteristics of high outlet water temperature, high heating power and long-term stable operation, which provides a high grade low temperature heat source for the heat pump system to improve its operation performance. At the same time, the medium-depth buried pipe itself has the characteristics of intermittent heat storage, which can well meet the change of building heating demand and the flexible energy use. The stepless frequency conversion heat pump unit is more suitable for matching operation with the medium-depth buried pipe, and the energy-saving and emission reduction effect is remarkable. The water system on the heat source side has the characteristics of small flow, large head, and large change of resistance with the change of flow. The research results provide key guidance for improving the heating performance of the technology.
Keywords:medium-depth buried pipe; heat pump system; heat source side water system; operation characteristic; resistance characteristic; field test and analysis