基于1D/3D协同仿真流量与温差调控模式影响分析

针对地下水源能量利用系统建筑负荷的动态变化,基于1D/3D集成分析数值方法的基础上,分析了定流量变温差及定温差变流量两时变模式系统性能参数的变化。结果表明:定温差变流量调控模式由于抽水量小于定流量变温差模式,含水层发生热贯通时间较晚;发生热贯通后,由于抽水温差大于定流量变温差模式,冷水封面向抽水井移动速度较快,抽水温度下降幅度较大,热贯通程度显著。抽灌水流量对热贯通起主导作用,热贯通发生后抽灌水温差对地下水温度影响较大;定温差变流量模式机组的COP值迅速下降,运行过程中耗功较少,系统能效比较大。

Impact analysis of flow and temperature regulation pattern based on 1D/3D collaborative simulation

Given the building loading dynamic change of the underground water energy utilization system, based on one-dimensional and three-dimensional integrated analytic numerical method and analyzed the change of the system performance parameters of the constant flow by the variable temperature difference and the constant temperature difference by the variable flow modes.The studies have shown that the aquifers thermal breakthrough time is late when using regulation mode of fixed temperature gap and variable flux; after thermal breakthrough, the cold water cover moves to the pumping wells quickly, the pumping temperature decreases rapidly, the heat through degree is conspicuous; the unit COP value decreased rapidly, In the process of running power consumption is less, the system can effect comparing is larger. The pumping temperature decreased less when using the mode of variable temperature gap and fixed flux, the mode is more favorable for long-term stable running.