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本文介绍了地下含水层储能的基本原理,建立了深井回灌式水源热泵系统含水层储能的数学模型并通过数值计算分别对6组不同井对距离条件下含水层采能区温度场的演化进行了量化研究,并对地温场的演化规律与井对距离之间的关系进行了理论分析,拟合出1个周期运行末期抽水温度相对变化值与井间距之间的关系。研究结果表明,抽、灌井对距离越大,抽水井温度变化越迟缓,且温度变幅越小,其原因是井对间距越大,渗流区水动力影响范围越大,抽、灌区等效渗流速度越小,回灌水向抽水井运动过程中散热(吸热)越充分。
This paper introduces the basic principle of underground aquifer energy storage, establishes the mathematical model of the aquifer energy storage in the deep well recharged water source heat pump system, and numerically calculates the temperature field of the aquifer mining area under the conditions of six different wells and different distances. The evolution has been studied quantitatively, and the relationship between the evolution law of the ground temperature field and the relationship between the well and the distance has been analyzed theoretically, and the relationship between the relative change of the pumping temperature at the end of a cycle operation and the well spacing has been fitted. The research results show that the larger the distance between pumping and irrigation wells, the slower the temperature change of the pumping well, and the smaller the temperature swing, the larger the distance between the wells, the greater the hydrodynamic range of the seepage area, and the equivalent of pumping and irrigation areas. The smaller the seepage velocity, the more adequate the heat (heat absorption) during the movement of the recharging water to the pumping well.