An experimental and a numerical study of horizontal earth-air heat exchanger in a hot climate

Benhamza, Mohamed El Ghazali; Brima, Abdelhafid; Houda, Saddok; Moummi, Noureddine

doi:10.1080/19397038.2016.1267817

Cited by 4 publications

(4 citation statements)

References 15 publications

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“…Similar trends were obtained in literature and one such study has reported effectiveness of 0.79 at a velocity of 3.5 m/s and inlet temeprature of 43.5 o C 37 in Algeria and in another study, effectiness of 0.8 at a velocity of 3.5 m/s and inlet temeprature of 49 o C is reported 27 in Algeria. The current study has reported efectivess of 0.82 at a velocity of 2.4 m/s with inlet temeprature of 43 o C and specific humidity of 0.105 kg/kg of dry air.…”

Section: Effect Of Factors Interactions On Effectiveness (E)supporting

confidence: 89%

“…Response Surface Model has been used in literature for Parametric optimization of vertical ground heat exchanger 59 and parametric optimization of horizontal earth to air heat exchanger. 27,60 No study has been found to the best of knowledge for the optimization of EAHE based on Full Factorial design which makes the current study novel.…”

Section: Point Prediction and Model Validationmentioning

confidence: 99%

“…Numerical modeling [20][21][22][23] and analytical modeling at different parametric values using different configurations have been done to a large extent. Most of the experiments have been performed with pipes laid in a straight line [24][25][26][27][28][29][30][31][32][33][34][35] and serpentine style [36][37][38][39] in both open mode 40 and closed mode 41 to study their usefulness. Large space requirement is a significant constraint for that.…”

Section: Introductionmentioning

confidence: 99%

“…Large space requirement is a significant constraint for that. So pipes were laid in meandering style by other researchers 27 to overcome this problem. U, S, and Z configurations have also been used.…”

Section: Introductionmentioning

confidence: 99%

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Experimental studies on natural bank type heating/cooling energy saving Air conditioning system

Goyal¹,

Asati²,

Rishabh³

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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The present study reports air-based novel energy saving compact bank type earth air heat exchanger system (EAHE) (having only 25m2 area) fabricated from Polyvinylchloride pipes of nominal diameter 0.203 mm (8 inches) for inlet and outlet headers and main pipes and 0.150 mm (6 inches nominal diameter) for branched pipes, which is installed in Shaheed Bhagat Singh State University, Ferozepur in Punjab state, India (North West border area of India) and studied for the duration from April to August 2021 using the full factorial design with four inlet variables at multilevel to find a model equation between inlet and outlet variables, i.e., heat exchanger effectiveness and achieved temperature difference. An induced airflow mode has been used to provide near-uniform flow through all corresponding pipes of symmetrical-shaped earth air heat exchangers. The values of Dry bulb temperature (DBT) and wet bulb temperature (WBT) have been measured for air inlet, for air outlet, as well as for ambient air using resistance temperature detectors (RTD) installed at the requisite locations. Earth's undisturbed temperature (EUT) was also noted by installing RTD at a depth of 2 m, and the average measured value of EUT is found to be 28.5°C. The current system has imparted the temperature difference variation from 0.4 oC to 9.4 oC, and the effectiveness varied from 0.16 to 0.82 during the whole season. This system could give a cooling potential of 0.0523 kJ/s to 1.587 kJ/s using a mass flow rate of 0.163 kg/s.Experiments have been designed methodically to apply the full factorial technique. Most favorable parameters have been found for hot and dry and hot and humid weather. The current study is novel in terms of significantly improving the effectiveness of EAHE and addressing the central issue of space limitation in urban areas.

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Section: Effect Of Factors Interactions On Effectiveness (E)supporting

confidence: 89%