中深层-浅层耦合地源热泵系统供热性能实测分析
Measured analysis of heating performance in a medium-deep and shallow coupled ground-source heat pump system
摘要：
针对中深层-浅层耦合地源热泵系统，本文介绍了其在不同热负荷规律下梯级利用的系统运行模式。对某项目耦合系统进行了整个冬季的连续监测，得到了其实际供热情况。分析结果表明，中深层井比浅层井的取热温度高53 ℃、取热量大5.6倍。梯级利用模式的中深层地热取热量较无梯级利用模式增大了1倍。中深层地热供热量中的30%来自于一级换热、70%来自于热泵二级换热。结果表明了中深层-浅层耦合地源热泵系统能源梯级利用的占比及优势。
Abstract：
Aiming at the medium-deep and shallow coupled ground-source heat pump system, this paper presents the operation modes of the cascade utilization system under the different heating loads. The actual heating performance of the coupled system is obtained through the continuous monitoring of a project in the whole winter. The analysis results show that the heat extraction temperature of medium-deep wells is 53 ℃ higher than that of shallow wells, and the heat extraction is 5.6 times higher than that of shallow wells. The medium-deep ground heat extraction in cascade utilization mode doubles the amount of the non-cascade utilization mode. The heat supply from the medium-deep ground energy of 30% is provided by the primary heat exchange, and 70% by the heat pump secondary heat exchange. The results show the proportion and advantages of the energy cascade utilization of the medium-deep and shallow coupled ground-source heat pump system.
Keywords:medium-deep ground heat; shallow ground heat; ground-source heat pump; cascade utilization; heating performance