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Application of linear superposition theory in successive thermal response tests without ground temperature recovery

机译：线性叠加理论在连续热响应试验中的应用无接地温度恢复

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摘要

The thermal response test is an important way to obtain underground thermal properties for the design of a ground-source heat pump system. In practice, two successive thermal response tests with different heating powers may be conducted in the same borehole. If the waiting time between the two tests is not long enough for the ground temperature to recover to the original ground temperature, the subsequent thermal response test may be affected by the residual ground temperature field of the initial test. In this case, there is an obvious deviation between the results computed using the conventional line source method for the two thermal response tests. In the current article, a new computational method, based on linear superposition theory, is proposed to solve the problem encountered in the situation described. With the proposed method, the thermal conductivity is computed for four sets of thermal response tests conducted on four boreholes located in different zones, and the results demonstrate the accuracy and reliability of the proposed method.
机译：热响应试验是获得地下热性能的重要方法，用于设计地源热泵系统的设计。实际上，可以在相同的钻孔中进行具有不同加热功率的两个连续热响应试验。如果两个测试之间的等待时间不足以足够长的接地温度恢复到原始地温度，则随后的热响应试验可能受初始测试的残余地温度场的影响。在这种情况下，使用传统的线源方法对于两个热响应测试计算的结果之间存在明显的偏差。在本文中，提出了一种基于线性叠加理论的新计算方法，以解决所描述的情况遇到的问题。利用所提出的方法，在位于不同区域的四个钻孔上进行的四组热响应试验计算导热率，结果证明了所提出的方法的准确性和可靠性。

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