Numerical simulation of ground heat and water transfer for groundwater heat pump system based on real-scale experiment
Numerical simulation of ground heat and water transfer for groundwater heat pump system based on real-scale experiment
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DOI：
10.1016/j.enbuild.2009.07.012
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发表时间：
2010
影响因子：
6.7
通讯作者：
Y. Nam;R. Ooka
中科院分区：
文献类型：
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作者：
Y. Nam;R. Ooka
地下水热泵（GWHP）系统是一个开环系统，它从井或地表水中取水，通过热交换器，然后将水排入注入井或附近的河流。地源热泵系统利用地下水相对稳定的温度，可以获得比传统空气源热泵系统更高的性能系数，并可以节省更多的能源。系统的性能取决于地下水的条件，特别是温度和深度，这影响热泵和系统的性能。为了优化地源热泵系统的设计和运行，有必要开发一种能够预测地下水和热流并综合评价系统性能的模拟工具。在本研究中，三维数值模拟和实验，利用真实规模的设备已经进行，以开发的GWHP系统的优化方法。将仿真结果与实验结果进行了对比，验证了仿真模型的有效性。此外，通过计算各种地下水和井条件下的性能系数，对优化调度方法进行了几个案例研究。
The groundwater heat pump (GWHP) system is an open-loop system that draws water from a well or surface water, passes it through a heat exchanger and discharges the water into an injection well or nearby river. By utilizing the relatively stable temperature of groundwater, GWHP system can achieve a higher coefficient of performance and can save more energy than conventional air-source heat pump (ASHP) system. The performance of the system depends on the condition of groundwater, especially temperature and depth, which affect performance of the heat pump and system. For the optimization of design and operation of GWHP systems, it is necessary to develop a simulation tool which can predict groundwater and heat flow and evaluate system performance comprehensively. In this research, 3D numerical heat-water transfer simulation and experiments utilizing real-scale equipment has been conducted in order to develop the optimization method for GWHP systems. Simulation results were compared with the experimental results, and the validity of the simulation model was confirmed. Furthermore, several case studies for the optimal operation method have been conducted by calculating the coefficient of performance on various groundwater and well conditions.