Influence of coating soil types on the energy of earth-air heat exchanger

Cuny, Mathias; Lin, Jianguo; Siroux, Monica; Magnenet, Vincent; Fond, Christophe

doi:10.1016/j.enbuild.2017.10.048

Cited by 59 publications

(26 citation statements)

References 16 publications

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“…To decrease the outlet temperature of air in the summer by about 5°C, Xamána et al [35] applied thermal insulation in the final part of underground channels. Diverse kinds of soil have just 2% impact on thermal performance if the moisture is at the maximum amount [36]. In one numerical simulation [37], sandy soil was realized to be the best ground cover in Malaysian climate, followed by sandy clay loam, clay, loam and silty clay soil.…”

Section: Literature Reviewmentioning

confidence: 99%

Techno-economic assessment and optimization of a hybrid renewable earth - air heat exchanger coupled with electric boiler, hydrogen, wind and PV configurations

2020

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Section: Literature Reviewmentioning

confidence: 99%

Techno-economic assessment and optimization of a hybrid renewable earth - air heat exchanger coupled with electric boiler, hydrogen, wind and PV configurations

2020

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“…The operation of the EAHE depends on the soil conditions and properties because they influence the amount of heat that will be removed or supplied to the air. Several studies [25][26][27][28][29][30][31][32][33] have focused on studying aspects such as the temperature of the soil with respect to time or its content of humidity. These studies have shown that the higher the moisture content in the soil, the smaller the length necessary for the transfer of heat between the soil and the air.…”

Section: Introductionmentioning

confidence: 99%

Thermal potential of a geothermal earth-to-air heat exchanger in six climatic conditions of México

Rodríguez-Vázquez

Xamán

Chávez

et al. 2020

Mechanics & Industry

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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.

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“…Such energy system is particularly suitable for contrasting climates, either for preheating [5], or for cooling [6]. This energy system is also suitable for temperate climates such as [7], [8] and [9]. The use of an EAHE and its energy performance are highly dependent on climatic conditions [10].…”

Section: Introductionmentioning

confidence: 99%

“…The soil type also allows improving the performance of the system. Indeed, the thermal performance can reach 15.9 % with a soil composed of sand [7]. Combined with a dual-ow controlled mechanical ventilation, the system's coecient of performance (COP ) is dened by the ratio between the heating capacity and the system consumption power and the COP can reach 16.3 [5].…”

Section: Introductionmentioning

confidence: 99%

Multi-criteria optimization of an earth-air heat exchanger for different French climates

et al. 2020

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The Earth-Air Heat Exchanger (EAHE) is a system for cooling or preheating the blown air into a building. A modeling of this system is proposed from a model for the ground and a model for the exchanger. The results are in agreement between the outside air temperature of the numerical model and the experimental temperature measurements. A sensitivity analysis with factorial plans is carried out to determine the most impactful parameters, taking into account two energy criteria and one economic criterion. The results show that tube radius, tube length, air velocity, burial depth and soil nature are the most impactful parameters. A multi-criteria optimization study with genetic algorithms is then performed to determine the Pareto front. The criteria do not evolve in the same trend because when the cost of the energy recovered decreases, the coecient of performance and the EAHE eciency will deteriorate, and reciprocally. Finally, a multiple-criteria decision-making is carried out using the TOPSIS method to provide the optimal pipe conguration.The optimal solution provides a large tube length, an intermediate burial depth, and a small air velocity and tube radius. The EAHE can achieve strong energy performance in any French climate.

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Influence of coating soil types on the energy of earth-air heat exchanger

Cited by 59 publications

References 16 publications

Techno-economic assessment and optimization of a hybrid renewable earth - air heat exchanger coupled with electric boiler, hydrogen, wind and PV configurations

Techno-economic assessment and optimization of a hybrid renewable earth - air heat exchanger coupled with electric boiler, hydrogen, wind and PV configurations

Thermal potential of a geothermal earth-to-air heat exchanger in six climatic conditions of México

Multi-criteria optimization of an earth-air heat exchanger for different French climates

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