地下水源热泵系统THM耦合机理及模型建立

Establishment of THM Coupling Mechanism in Groundwater Source Heat Pump System

在分析了地下水源热泵运行中两低问题的基础上,发现导致两低问题的最根本原因是对地下水源热泵系统的基础地质问题和水文地质问题等基础研究的不足,进而提出了进行含水层THM三场耦合分析的观点。然后运用机理分析法分析了地下水源热泵系统中不同物理场的耦合机理,确定了渗流场、热力场和应力场等三场耦合关系图,建立了渗流场、热力场和应力场控制的耦合方程,从而建立了THM三场耦合数学模型。

Based on the analysis of the two-low problem in the operation of groundwater source heat pump, the basic reason causing this problem was determined, which was the lack of basic research on the geologic and hydrogeologic characterizations in the groundwater source heat pump system. In this paper, the aquifer THM coupling analysis was proposed. The mechanism analysis was then employed to study the coupling mechanisms for different physical fields in the groundwater source heat pump system, and the coupling relationships among the seepage field, thermal field, and stress field were obtained. Moreover, the coupling equations were also determined for the seepage, thermal, and stress fields, and thus the mathematical model coupling the three fields was developed.