Abstract Open earth-air heat exchangers (EAHE) have an inherent relationship with their surrounding environment, relying on the natural contrast between ambient air and subsurface temperatures. This work explored the seasonal sensitivity of open earth air heat exchanger systems to variations in these temperatures. Utilizing 492 weather files in Canada, the heating and cooling potential of open earth air heat exchangers computed using a climate-based approach were compared for different seasonal variation scenarios. Heightened sensitivity to seasonal changes in ground temperatures relative to air temperatures were observed. These effects expectedly decreased with depth. Heating and cooling potential sensitivity to seasonal variations in air temperatures are dependent on the timing, often observing the greatest influence during peak demand periods. Binning by climates identified that regions with a greater mix of heating and cooling potential were more susceptible to seasonal variations. These results also suggest improvements to the heating potential in Canada can be improved by increasing ground surface temperatures outside the summer season, with little influence on the cooling potential. Understanding the interaction between open earth air heat exchanger systems and their environments can ultimately help outline limitations and design solutions specific to their implementation in Canadian climates.

中文翻译：

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加拿大气候下开放式地气换热器对大气和地表温度变化的季节性敏感性

摘要 开放式地-气换热器（EAHE）与周围环境有着内在的联系，依赖于环境空气和地下温度之间的自然对比。这项工作探索了露天空气换热器系统对这些温度变化的季节性敏感性。利用加拿大的 492 个天气文件，针对不同的季节性变化情景，比较了使用基于气候的方法计算的露天地热换热器的加热和冷却潜力。观察到对地面温度相对于气温的季节性变化的敏感性更高。这些影响随着深度的增加而降低。对气温季节性变化的加热和冷却潜在敏感性取决于时间，通常在高峰需求期间观察到最大的影响。按气候划分的区域表明，加热和冷却潜力更大的地区更容易受到季节性变化的影响。这些结果还表明，可以通过在夏季以外增加地表温度来改善加拿大的供暖潜力，而对降温潜力的影响很小。了解露天空气换热器系统与其环境之间的相互作用最终有助于概述其在加拿大气候中实施的限制和设计解决方案。这些结果还表明，可以通过在夏季以外增加地表温度来改善加拿大的供暖潜力，而对降温潜力的影响很小。了解露天空气换热器系统与其环境之间的相互作用最终有助于概述其在加拿大气候中实施的限制和设计解决方案。这些结果还表明，可以通过在夏季以外增加地表温度来改善加拿大的供暖潜力，而对降温潜力的影响很小。了解露天空气换热器系统与其环境之间的相互作用最终有助于概述其在加拿大气候中实施的限制和设计解决方案。