Abstract
In this paper, the thermal and ventilation potential of a geothermal Earth-to-Air Heat exchanger (EAHE) is studied for six weather in Mexico. The cities for the study and their climate were Villahermosa (hot-humid), Merida (hot-sub humid), Monterrey (dry), Juarez City (very dry), Zacualtipan-Hidalgo (warm-humid) and Mexico City (warm-sub-humid). The thermal behavior of the EAHE was modeled numerically for the corresponding warmest and coldest days of the year for each city and three values of Reynolds number. The 24 hrs simulations were carried out with an in-house code using data every 10 minutes. To get the results, 5,184 computational runs were necessary. The results showed that the EAHE has poor ventilation potential for climates with high levels of humidity such as Villahermosa, while for cities with low levels of humidity such as Chihuahua, the ventilation potential increases significantly, the rest of the cities fall in between. As for its application in Mexico, the results show that the EAHE is highly recommended for dry climates such as at the north of the country and not recommended for humid climates such as at the south and south-east of the country.
Highlights
Nowadays, society has developed a huge dependence on electricity to carry out his daily activities; most of this electricity is produced by burning fossil fuels
An earthto-air heat exchanger (EAHE) is a system that consists of one or a series of tubes buried at a certain depth with the aim to heat or cool an airflow
The results showed that, an S-shaped configuration allows a good thermal performance of the EAHE in a smaller area of implementation (37%) in comparison with the typical configuration and the other configurations
Summary
Society has developed a huge dependence on electricity to carry out his daily activities; most of this electricity is produced by burning fossil fuels. The accelerated growing of population has exacerbated the electricity consumption and the greenhouse gases produced from these fuels has contributed to one of the major problems human kind is facing at the present time known as climate change. This situation has forced people use mechanical devices to achieve thermal comfort inside the buildings, which in turn, demand electricity for functioning, becoming this situation a vicious circle. An EAHE is a system that consists of one or a series of tubes buried at a certain depth with the aim to heat or cool an airflow This is achieved by taking advantage of the
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