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Techno-economic analysis and energy performance of a geothermal earth-to-air heat exchanger (EAHE) system in residential buildings: A case study
Energy Science & Engineering ( IF 3.8 ) Pub Date : 2021-08-05 , DOI: 10.1002/ese3.952
Ali Mostafaeipour 1 , Hossein Goudarzi 2 , Mohammadali Khanmohammadi 3 , Mehdi Jahangiri 4 , Ahmad Sedaghat 5 , Hirbod Norouzianpour 2 , Shahariar Chowdhury 6, 7 , Kuaanan Techato 6, 7 , Alibek Issakhov 8, 9 , Khalid Almutairi 10 , Seyyed Jalaladdin Hosseini Dehshiri 11
Affiliation  

Natural air ventilation in the hot-dry regions plays a key role to decrease indoor air temperature in hot season, also to improve thermal comfort during the cold season. One of the most common ways to take advantage of natural ventilation is using wind catcher with an underground tunnel. In this method, the tower catches the airflow and directs it to the underground tunnel to decrease the air temperature by transferring heat to the ground, which is cooler in the summer and warmer in the winter. Earth-to-air heat exchanger (EAHE) is a modern form of wind catcher with underground tunnel. In this method, air after passing through buried pipes exchanges heat with the ground, and its temperature increases in the winter and decreases during the summer. This study analyzes the energy performance and cost-effectiveness of earth-to-air heat exchanger to be utilized in a residential building in climate condition of the province of Kermanin Iran. In this regard, 9 different configurations of the EAHE are investigated to find the optimized EAHE. The system performance and cost-effectiveness are studied in 3 different depths including 1, 2, and 3 m with 3 different pipe lengths including 25, 50, and 75 m. The results show that the EAHE is capable of reducing the inlet air temperature by 0.5-9.9℃ in the summer and increasing it by 0.9-11.2℃ in the winter. Furthermore, by integrating the EAHEs in a building design, one can reduce the total annual cooling load by 1.25%-3.97% and for heating by 1.34%-3.96%. The payback period of the system with a pipe length of 25 m is 16 years, but for the systems with pipe lengths of 50 and 75 m, this period reduces to almost 3 years.

中文翻译:

住宅建筑地热地热换热器 (EAHE) 系统的技术经济分析和能源性能:案例研究

干热地区的自然通风对于在炎热季节降低室内空气温度,在寒冷季节提高热舒适度起着关键作用。利用自然通风的最常见方法之一是使用带有地下隧道的集风器。在这种方法中,塔捕捉气流并将其引导到地下隧道,通过将热量传递到地面来降低气温,夏季凉爽,冬季温暖。地对空换热器 (EAHE) 是一种现代形式的带有地下隧道的集风器。在这种方法中,空气通过埋地管道后与地面进行热交换,其温度冬季升高,夏季降低。本研究分析了在伊朗克尔曼宁省气候条件下的住宅建筑中使用的地对空热交换器的能源性能和成本效益。在这方面,研究了 EAHE 的 9 种不同配置以找到优化的 EAHE。系统性能和成本效益在 1、2 和 3 m 的 3 种不同深度以及 25、50 和 75 m 的 3 种不同管道长度中进行了研究。结果表明,EAHE能够在夏季将进气温度降低0.5-9.9℃,在冬季可将进气温度升高0.9-11.2℃。此外,通过将 EAHE 集成到建筑设计中,可以将年总冷负荷降低 1.25%-3.97%,并将供暖负荷降低 1.34%-3.96%。管道长度为 25 m 的系统投资回收期为 16 年,
更新日期:2021-10-03
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