Abstract An earth-to-air heat exchanger (EAHE) is a shallow geothermal energy utilization technology, which can significantly reduce the building energy consumption. This study aims to investigate the effects of an EAHE on the indoor thermal environment in hot-summer and cold-winter regions. A full-scale experiment was conducted for a continuous 24 h period using two identical buildings (with and without an EAHE) exposed to the same outdoor conditions on typical summer and winter days. Experimental results show that the EAHE provides an average outdoor air temperature reduction of 9.12 °C under cooling conditions and increase of 5.53 °C under heating conditions. Moreover, the average outdoor air relative humidity increases by 46.89% and decreases by 27.41% in the cooling and heating conditions, respectively; the corresponding average EAHE coefficients of performance (COP) are 7.03 and 4.26, respectively. Compared to that of the building without EAHE, the average indoor air temperature of the building with EAHE decreases by 5.9 °C in summer and increases by 4.29 °C in winter, and the average walls' internal surface temperature decreases by approximately 6 °C and increases by approximately 5.8 °C. Moreover, the EAHE system reduces the average building cooling and heating loads by 55.4 and 40.43 W/m2, respectively.

中文翻译：

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典型夏热冬冷地区地气换热器对夏季和冬季室内热环境影响的现场试验

摘要 地气换热器（EAHE）是一种浅层地热能利用技术，可显着降低建筑能耗。本研究旨在研究 EAHE 对夏热冬冷地区室内热环境的影响。使用两座相同的建筑物（有和没有 EAHE）在典型的夏季和冬季暴露在相同的室外条件下，进行了连续 24 小时的全面实验。实验结果表明，EAHE 在冷却条件下使室外空气温度平均降低 9.12 °C，在加热条件下平均升高 5.53 °C。此外，平均室外空气相对湿度在制冷和制热条件下分别增加46.89%和27.41%；相应的平均 EAHE 性能系数 (COP) 分别为 7.03 和 4.26。与没有EAHE的建筑相比，有EAHE的建筑的室内空气温度夏季平均降低5.9℃，冬季升高4.29℃，平均墙体内表面温度降低约6℃，增加约 5.8 °C。此外，EAHE 系统将平均建筑制冷和供暖负荷分别降低了 55.4 和 40.43 W/m2。内表面温度降低约 6 °C，升高约 5.8 °C。此外，EAHE 系统将平均建筑制冷和供暖负荷分别降低了 55.4 和 40.43 W/m2。内表面温度降低约 6 °C，升高约 5.8 °C。此外，EAHE 系统将平均建筑制冷和供暖负荷分别降低了 55.4 和 40.43 W/m2。