The medium-deep borehole heat exchanger (MDBHE) coupled heat pump (HP) is a promising building heating solution for carbon reduction. Existing studies claim that the MDBHE-HP suffers a bottleneck challenge of long-term heating performance degradation because of the heating extraction attenuation of the MDBHE, which largely hinders the practical applications of the MDBHE-HP. This study innovatively proposes and justifies that climate change positively compromises the heating extraction attenuation of the MDBHE and significantly improves the long-term building heating performance of the MDBHE-HP. Climate change reduces the building heating load, which mitigates the heating extraction attenuation of the MDBHE, thereby reducing the unmet level of the building heating load. The mitigated heating extraction attenuation enhances the coefficient of performance of the MDBHE-HP, thereby reducing the heating energy consumption. Case studies of 30-year operation in the severe cold and cold zones of China with different geological conditions show that while the heating extraction attenuation of the MDBHE increases the heating energy consumption by 5.0% – 8.7%, climate change reduces the heating energy consumption by 9.2% – 17.0%. Moreover, climate change reduces the unmet level of the building heating load by 70.5% – 100%. Therefore, the positive effects of climate change on the long-term building heating performance of MDBHE-HP should be considered, which contributes to promoting the practical applications of the MDBHE-HP for low-carbon building heating.

中深钻孔热交换器 (MDBHE) 耦合热泵 (HP) 是一种很有前途的碳减排建筑供暖解决方案。现有研究认为，由于MDBHE-HP的加热提取衰减，MDBHE-HP面临长期供热性能下降的瓶颈挑战，这在很大程度上阻碍了MDBHE-HP的实际应用。本研究创新地提出并论证了气候变化会积极影响 MDBHE 的取暖衰减，并显着提高 MDBHE-HP 的长期建筑供暖性能。气候变化降低了建筑热负荷，从而减轻了 MDBHE 的取暖衰减，从而降低了建筑热负荷的未满足水平。减轻的加热提取衰减提高了 MDBHE-HP 的性能系数，从而降低了加热能耗。我国不同地质条件的严寒、寒冷地区30年运行实例表明，虽然多级换热器的取暖衰减使供热能耗增加5.0%～8.7%，但气候变化使供热能耗降低了5.0%～8.7%。 9.2% – 17.0%。此外，气候变化使建筑供暖负荷的未满足水平降低了 70.5% – 100%。因此，应考虑气候变化对MDBHE-HP建筑长期供热性能的积极影响，这有助于促进MDBHE-HP在低碳建筑供暖领域的实际应用。我国不同地质条件的严寒、寒冷地区30年运行实例表明，虽然多级换热器的取暖衰减使供热能耗增加5.0%～8.7%，但气候变化使供热能耗降低了5.0%～8.7%。 9.2% – 17.0%。此外，气候变化使建筑供暖负荷的未满足水平降低了 70.5% – 100%。因此，应考虑气候变化对MDBHE-HP建筑长期供热性能的积极影响，这有助于促进MDBHE-HP在低碳建筑供暖领域的实际应用。我国不同地质条件的严寒、寒冷地区30年运行实例表明，虽然多级换热器的取暖衰减使供热能耗增加5.0%～8.7%，但气候变化使供热能耗降低了5.0%～8.7%。 9.2% – 17.0%。此外，气候变化使建筑供暖负荷的未满足水平降低了 70.5% – 100%。因此，应考虑气候变化对MDBHE-HP建筑长期供热性能的积极影响，这有助于促进MDBHE-HP在低碳建筑供暖领域的实际应用。