提高钻孔传热率的能力可以降低钻孔的总长度要求，从而降低系统成本。使用具有较高导热性的灌浆密封钻孔的能力被吹捧为减少地下换热器长度的一种方法。在实际地源热泵系统中，对标准膨润土灌浆和热增强灌浆的传热性能进行了监测。结果表明，通过增强灌浆回路，瞬时传热率提高了10%，综合总换热增加了25%。单位:双引文:研讨会，ASHRAE交易，第卷。 第106页。2.

The ability to improve the heat transfer rate of a borehole can reduce the overall bore length requirements, resulting in lower system cost. An ability to seal the borehole with grout having a higher thermal conductivity is touted as a means to reduce ground heat exchanger length. The performance in an actual GSHP system of the heat transfer of standard bentonite grout and thermally enhanced grout has been monitored. Results show a 10% improvement in instantaneous heat transfer rate with 25% more integrated total heat exchange with the enhanced grout circuit.Units: Dual