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通过建立地埋管传热模型和变频水泵能耗模型,对不同地埋管群分区运行控制策略下对应的钻孔壁温、出水温度和能耗进行模拟计算。结果表明:地源热泵系统地埋管群采用分区运行控制策略钻孔壁温和出水温度恢复较好,采用负荷控制策略时的节能率关系为:75%负荷率>50%负荷率>25%负荷率;采用时间控制策略时的节能率关系为:下午时段>中午时段>上午时段;采用水温控制策略时的节能率关系为:出水29℃>出水30℃>出水28℃;采用分区运行控制策略节能率均可达到20%,高于地源侧系统变流量运行控制策略。
Through the establishment of underground pipe heat transfer model and variable frequency pump energy consumption model, the corresponding borehole wall temperature, water outlet temperature and energy consumption under different zone control strategies are simulated. The results show that the groundwater heat pump system buried pipe group adopts the partition operation control strategy to recover the borehole wall temperature and outlet water temperature well, and the load-saving strategy when the load-saving strategy is adopted is: 75% load rate> 50% load rate> 25% load The rate of energy saving when adopting the time control strategy is as follows: Afternoon time period> Noon time period> Morning time period. When the water temperature control strategy is adopted, the energy saving rate is as follows: effluent 29 ℃> effluent 30 ℃> effluent 28 ℃; Energy-saving rate can reach 20%, higher than the ground-based system variable flow operation control strategy.