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首页> 外文期刊>Journal of building performance simulation >Simulation of a domestic ground source heat pump system using a three-dimensional numerical borehole heat exchanger model
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Simulation of a domestic ground source heat pump system using a three-dimensional numerical borehole heat exchanger model

机译：使用三维数值钻孔换热器模型模拟家用地源热泵系统

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摘要

Common approaches to the simulation of borehole heat exchangers (BHEs) assume heat transfer in circulating fluid and grout to be in a quasi-steady state and ignore fluctuations in fluid temperature due to transport of the fluid around the loop. However, in domestic ground source heat pump (GSHP) systems, the heat pump and circulating pumps switch on and off during a given hour; therefore, the effect of the thermal mass of the circulating fluid and the dynamics of fluid transport through the loop has important implications for system design. This may also be important in commercial systems that are used intermittently. This article presents transient simulation of a domestic GSHP system with a single BHE using a dynamic three-dimensional (3D) numerical BHE model. The results show that delayed response associated with the transit of fluid along the pipe loop is of some significance in moderating swings in temperature during heat pump operation. In addition, when 3D effects arc considered, a lower heat transfer rate is predicted during steady operations. These effects could be important when considering heat exchanger design and system control. The results will be used to develop refined two-dimensional models.
机译：用于模拟井壁热交换器（BHE）的常用方法假定循环流体和灌浆中的热传递处于准稳态，并且忽略由于流体围绕环路的传输而引起的流体温度波动。但是，在家用地面源热泵（GSHP）系统中，热泵和循环泵在给定的时间内打开和关闭；因此，循环流体的热质量和通过环路的流体传输动力学的影响对系统设计具有重要意义。这在间歇使用的商业系统中也可能很重要。本文介绍了使用动态三维（3D）数值BHE模型对具有单个BHE的家用GSHP系统的瞬态仿真。结果表明，与流体沿管道环路的传输相关的延迟响应对于在热泵运行期间缓和温度波动具有一定意义。此外，如果考虑3D效果，则可以在稳定运行期间预测较低的传热速率。在考虑换热器设计和系统控制时，这些影响可能很重要。结果将用于开发精细的二维模型。

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