Transient effect of soil thermal diffusivity on performance of EATHE system

Mathur, Anuj; Srivastava, Ayushman; Mathur, Jyotirmay; Mathur, Sanjay; Agrawal, Ghanshyam Das

doi:10.1016/j.egyr.2014.11.004

Cited by 41 publications

(6 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The study states that wetting the soil surrounding the pipe leads to increase the heat dissipation by raising the thermal conductivity value of the soil. Therefore the moisture effect of soil on the heat exchange can be considered as a significant parameter affecting thermal performance, confirming the results obtained in many researches [40,41,28] .…”

Section: Discussionsupporting

confidence: 84%

“…Meanwhile, this depth can vary in relation to the geographical location and latitude, and can change annually as result of climatic changes (temperature, relative humidity and rainfall rate) as documented in many researches [22][23][24] . Several works have explained the relations between the heat exchange capacity and the composition, the moisture and the thermal characteristics of the soil [25][26][27][28] . All these factors directly or indirectly affect the performance of cooling or heating of EAHE together with the characteristics of the pipes [29][30][31] .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Cooling performance of earth-to-air heat exchangers applied to a poultry barn in semi-desert areas of South Iraq

Morshed

Leso

Conti

et al. 2018

International Journal of Agricultural and Biological Engineering

View full text Add to dashboard Cite

Earth-to-air heat exchangers (EAHE) can reduce the energy consumption required for heating and cooling of buildings. The composition and the thermal characteristics of the soil influence the heat exchange capacity, and the soil moisture can furthermore affect thermal performance of EAHE. The aim of this study was to compare the thermal performance of EAHE in dry and artificially wetted soil. Tests were carried out in the Basra Province (Iraq), in a semi-desert area. Two experimental EAHE were built in a poultry barn and tested from June 2013 to September 2013. The pipe exchangers were buried at 2 m deep. One heat exchanger operated in dry soil (DE), while the other one operated in artificially wetted soil (WE). In the WE system, a drip tubing placed 10 cm above the air pipe wetted the soil around the exchanger. Air temperatures at the inlet and at the outlet of both the exchangers as well as soil temperature at 2 m deep were continuously monitored. The experimental results confirmed that wetting the soil around EAHE improves the general heat exchange efficiency. The coefficient of cooling performance (COP) of the earth-to-air heat exchangers system was evaluated on the basis of the ratio between the heat removed from the air or added to the air and the energy input. During the day, with an average COP of 6.41, the WE system cooled the air more than the DE system, which reported a value of 5.07. On average, in the hottest hours of the day, the outlet temperature of the WE was 37.35°C while in the DE it was 38.91°C. Moreover, during the nighttime, the WE system warmed the air more than the DE system.

show abstract

Section: Discussionsupporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Cooling performance of earth-to-air heat exchangers applied to a poultry barn in semi-desert areas of South Iraq

Morshed

Leso

Conti

et al. 2018

International Journal of Agricultural and Biological Engineering

View full text Add to dashboard Cite

show abstract

“…Benhammou et al [35,36] Menhoudj et al [26] Mathur et al [37] Validation Exp e-Ajmi et al [22] Our Work…”

Section: Referencementioning

confidence: 74%

Modelling and Numerical Investigation of the thermal properties effect on the soil temperature in Adrar region.

Belatrache

Saifi

Harrouz

et al. 2020

AJRESD

View full text Add to dashboard Cite

Geothermal energy is part in various clean sources in the world. The geothermal energy resources originate from the ground and its temperature varies according to depth and its thermal properties. This paper presents a numerical simulation of the soil temperature variation in different thermal properties depending on the nature of the soil. three different Specific heat capacity and thermal conductivity are used in this this simulation and have applied in Adrar city. Three soils A, B and C, each soil has characteristics that are different from the others are presented. The results showed that the soil C is considered the best soil in terms of results in the southern desert region that can be applied to help in ventilation, cooling homes in summer (22°C) and natural heating in winter (31°C). A is considered to be a soil with high thermal insulation and its results can be used for agricultural irrigation applications in desert areas in the summer season because its temperature stabilizes at 26 °C. As an economic vision, it can use the soil B in depth of 3 m to reduce costs, based on the convergence of the results of soil C in this depth, but it's remain less effective

show abstract

“…Xamán et al discussed the effect of thermal insulation at the outlet section of the EAHE. From the results, they concluded that the performance of the EAHE improved with an insulation thickness of 0.05 m. Mathur et al showed that the soil temperature around the pipe depends on the thermal conductivity of soil where the soil with a lower thermal conductivity will saturate at a faster compared to the soil with a higher thermal conductivity. Kaushal et al presented a 2D simulation model.…”

Section: Introductionmentioning

confidence: 99%

Parametric study on the performance of the earth‐to‐air heat exchanger for cooling and heating applications

Hasan

Noori

Shkarah

2019

Heat Trans. Asian Res.

View full text Add to dashboard Cite

To reduce energy consumption, the earth-to-air heat exchanger (EAHE) is a suitable technique for cooling and heating buildings. This paper studies numerically the effect of some design parameters (pipe diameter, inlet condition, pipe length, and outlet condition) on the overall performance of the EAHE system. Four diameters of the EAHE pipe (2, 3, 4, and 6 in) are studied and this numerical study has been done for summer and winter seasons for Nasiriyah city in southern Iraq. First, the built numerical model was validated against the experimental model, and the results of comparison showed a good consensus. After the validation and by using computational fluid dynamics modeling, the overall performance of the EAHE system with all pipe diameters was analyzed with ranges of air velocity, DBT or inlet temperature, and a pipe length of 50 m. The simulated results showed that the EAHE system with 6 in pipe diameter has the best values of overall performance, but from the thermal performance point of view, the 2 in pipe diameter is more suitable. K E Y W O R D S computational fluid dynamics, earth-to-air heat exchanger system, geothermal energy, numerical investigation, thermal performance Heat Transfer-Asian Res. 2019;48:1805-1829.wileyonlinelibrary.com/journal/htj

show abstract

Transient effect of soil thermal diffusivity on performance of EATHE system

Cited by 41 publications

References 18 publications

Cooling performance of earth-to-air heat exchangers applied to a poultry barn in semi-desert areas of South Iraq

Cooling performance of earth-to-air heat exchangers applied to a poultry barn in semi-desert areas of South Iraq

Modelling and Numerical Investigation of the thermal properties effect on the soil temperature in Adrar region.

Parametric study on the performance of the earth‐to‐air heat exchanger for cooling and heating applications

Contact Info

Product

Resources

About