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

Hasan, Mushtaq I.; Noori, Sajad W.; Shkarah, Ahmed Jassim

doi:10.1002/htj.21458

Cited by 23 publications

(12 citation statements)

References 19 publications

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“…they showed that the saturated soil displays the greatest general performance of EAHEs than by other soils, also the wall thickness and pipe material no significant influence on the overall performance. [71] studied numerically the effect of wall thickness and tube material on the overall performance of EAHEs . Their results noted the more suitable to use is PVC pipe because it is non-corrosive and less cost compared with steel pipe.…”

Section: Effect Of Pipe Of Thicknessmentioning

confidence: 99%

A review of earth to air heat exchanger as a passive cooling and heating technique and the affecting parameters

Hasan

Muter

2021

QJES

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In the recent time the EAHE is widely used as a passive cooling and heating technique due to the hug thermal potential of earth as and as a result of energy crisis. In the past years many researches published including studying this type of heat exchanger and using it in many applications and many locations with different climate conditions. Also these researches investigated the most affecting parameters. In this paper a review is made to survey the published literature is this filed to shed a light on the research in this subject

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Section: Effect Of Pipe Of Thicknessmentioning

confidence: 99%

A review of earth to air heat exchanger as a passive cooling and heating technique and the affecting parameters

Hasan

Muter

2021

QJES

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“…The problem is very common in the literature and this approximation (calculation of the temperature field using CFD basing of FEM, therefore not through a resistive approach) is usually accepted for approaches similar to ours [45,49,50].…”

Section: The Thermal Resistance Approach In the Eahx Systemmentioning

confidence: 99%

The Optimization of the Thermal Performances of an Earth to Air Heat Exchanger for an Air Conditioning System: A Numerical Study

Greco

Masselli

2020

Energies

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The aim of this paper is to research the parameters that optimize the thermal performances of a horizontal single-duct Earth to Air Heat eXchanger (EAHX). In this analysis, the EAHX is intended to be installed in the city of Naples (Italy). The study is conducted by varying the most crucial parameters influencing the heat exchange between the air flowing in the duct and the ground. The effect of the geometrical characteristics of the duct (pipe length, diameter, burial depth), and the thermal and flow parameter of humid air (inlet temperature and velocity) has been studied in order to optimize the operation of this geothermal system. The results reveal that the thermal performance increases with length until the saturation distance is reached. Moreover, if the pipe is designed with smaller diameters and slower air flows, if other conditions remain equal, the outlet temperatures come closer to the ground temperature. The combination that optimizes the performance of the system, carried out by forcing the EAHX with the design conditions for cooling and heating, is: D = 0.1 m s−1; v = 1.5 m s−1; L = 50 m. This solution could also be extended to horizontal multi-tube EAHX systems.

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“…The influence of the pipe thickness is analyzed for an intermediate pipe with a diameter of 1.5 m and a length of 150 m. Thickness is seen to have a very slight influence on the performance of the system [47]. This is due to its very small magnitude, when compared to the soil surrounding the pipe.…”

Section: Pipe Thickness Pipe Material and Distance Between Pipesmentioning

confidence: 99%

Earth-Cooling Air Tunnels for Thermal Power Plants: Initial Design by CFD Modelling

Camba

Petrakopoulou

2020

Energies

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Climate change and the increase of the consumption of energy resources are expected to further strain anticipated water stress scenarios. The operation of existing thermal plants depends greatly on their cooling capacity, for which large amounts of water are withdrawn and consumed. Dry-cooling systems, on the other hand, do not require water, but they are less efficient and more expensive relative to conventional water-based systems, because of their dependency on the ambient temperature. This paper introduces the new idea of replacing water-based cooling systems in thermal power plants with earth-cooling air tunnels. Based on the concept of existing earth-air heat exchangers, the system takes advantage of the low and relatively constant underground temperature for cooling ambient air before it is introduced in the air condenser of the plant. In this work, we present an initial design of such an open-loop system for a 20 MW concentrated solar power plant. A sensitivity study of both geometric and flow parameters is realized using computational fluid dynamics simulations. Under the requirements of the study, we find that a system using a design of pipes with 0.5 m diameter and about 300 m length can be considered a technically viable zero-water alternative to water-cooling technologies.

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

Cited by 23 publications

References 19 publications

A review of earth to air heat exchanger as a passive cooling and heating technique and the affecting parameters

A review of earth to air heat exchanger as a passive cooling and heating technique and the affecting parameters

The Optimization of the Thermal Performances of an Earth to Air Heat Exchanger for an Air Conditioning System: A Numerical Study

Earth-Cooling Air Tunnels for Thermal Power Plants: Initial Design by CFD Modelling

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