Numerical and experimental validation of a new hybrid model for vertical ground heat exchangers

Gallero, Francisco Javier González; Maestre, Ismael Rodríguez; Gómez, Pascual Álvarez; Blázquez, Juan Luis Foncubierta

doi:10.1016/j.enconman.2015.07.012

Cited by 21 publications

(1 citation statement)

References 28 publications

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“…It is also concluded that EAHEs with a 60 m pipe length and 1.5 m/s air velocity have the maximum performance. Gallero et al [22] developed a new simple model to evaluate thermal behavior of single U-tube ground heat exchangers and validated it against experimental data with 0.3% relative error. The performance of EAHEs have been widely analyzed by numerical methods, experimental studies, and simulations using computational software.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of the efficiency of earth to air heat exchange systems in cold and hot-arid climates

Fazlikhani

Goudarzi

Solgi

2017

Energy Conversion and Management

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In order to examine and compare the efficiency of earth to air heat exchanger (EAHE) systems in hot-arid (Yazd) and cold (Hamadan) climates in Iran a steady state model was developed to evaluate the impact of various parameters including inlet air temperatures, pipe lengths and ground temperatures on the cooling and heating potential of EAHEs in both climates. The results demonstrated the ability of the system to not only improve the average temperature and decrease the temperature fluctuation of the outlet air temperature of EAHE, but also to trigger considerable energy saving. It was found that in both climates, the system is highly utilized for pre-heating, and its usage is unfeasible in certain periods throughout the year. In winter, EAHEs have the potential of increasing the air temperature in the range of 0.2-11.2°C and 0.1-17.2°C for Yazd and Hamadan, respectively. However, in summer, the system decreases the air temperature for the aforementioned cities in the range of 1.3-11.4°C and 5.7-11.1°C, respectively. The system ascertains to be more efficient in the hot-arid climate of Yazd, where it can be used on 294 days of the year, leading to 50.1-63.6% energy saving, when compared to the cold climate of Hamadan, where it can be used on 225 days of the year resulting in a reduction of energy consumption by 24.5-47.9%.

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Section: Introductionmentioning

confidence: 99%