地下含水层储能两阶段热量运移数值模型研究

为了简单而准确地预测地下含水层储能情况,考虑了地下含水层储能过程时间跨度大、储能保温分阶段的实际特点,分析了地下含水层流动和换热模型物理参数的对比特点,以热平衡和热扩散原理为基础,建立分成两个连续阶段的地下含水层储能数值计算模型.模型求解中,采用控制容积法,以全隐格式进行热扩散方程的离散化,然后应用Jacobi方法迭代求解,模拟结果和实际观测数据吻合很好.该模型还分析了含水层储能循环采灌过程中抽出储能水的温度变化的一般特点.

Research on a numerical model of twin-phase thermal transmission for aquifer thermal energy storage

For estimating the situation of aquifer thermal energy storage simply and accurately, according to the practical characters of the aquifer thermal energy storage such as a process of long duration and storage in twin-phase, the authors analyzed the physical parameters' contrast between the aquifer's flow model and aquifer's thermal transfer model. Furthermore, a thermal transmission numerical model in twin-phase was established based on the theory of thermal balance and thermal diffusion. In order to solve the model then the Jacobi's iterative method was utilized, with the help of the volume control technique and the thermal diffusion equation's dispersion of implication format. The simulated results coincided with the measured data in the test. Then general features of the pumping water temperature were analyzed in the cyclical application. The results indicate that this numerical method is simple and efficiency, and able to provide scientific basis for the engineering designing.