Simple and accurate model for the ground heat exchanger of a passive house

Bădescu, Viorel

doi:10.1016/j.renene.2006.03.004

Cited by 120 publications

(50 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…There are many papers focused on the issue of mathematical modelling of EAHEs operation [10][11][12][13][14][15][16][17][18][19][20]. Majority of mentioned take into account one-pipe structures of exchangers and focus attention on EAHEs thermal performance.…”

Section: Multi-pipe Earth-to-air Heat Exchangersmentioning

confidence: 99%

Experimental investigation and CFD simulation of multi-pipe earth-to-air heat exchangers (EAHEs) flow performance

Amanowicz

Wojtkowiak

2017

E3S Web Conf.

View full text Add to dashboard Cite

Abstract. In this paper the experimentally obtained flow characteristics of multi-pipe earth-to-air heat exchangers (EAHEs) were used to validate the EAHE flow performance numerical model prepared by means of CFD software Ansys Fluent. The cut-cell meshing and the k- realizable turbulence model with default coefficients values and enhanced wall treatment was used. The total pressure losses and airflow in each pipe of multi-pipe exchangers was investigated both experimentally and numerically. The results show that airflow in each pipe of multi-pipe EAHE structures is not equal. The validated numerical model can be used for a proper designing of multi-pipe EAHEs from the flow characteristics point of view. The influence of EAHEs geometrical parameters on the total pressure losses and airflow division between the exchanger pipes can be also analysed. Usage of CFD for designing the EAHEs can be helpful for HVAC engineers (Heating Ventilation and Air Conditioning) for optimizing the geometrical structure of multi-pipe EAHEs in order to save the energy and decrease operational costs of low-energy buildings.

show abstract

Section: Multi-pipe Earth-to-air Heat Exchangersmentioning

confidence: 99%

Experimental investigation and CFD simulation of multi-pipe earth-to-air heat exchangers (EAHEs) flow performance

Amanowicz

Wojtkowiak

2017

E3S Web Conf.

View full text Add to dashboard Cite

show abstract

“…Its tested system is a network of 36 tubes 16 cm in diameter, 25 cm length, located at various different depths 2m; 2.5m; and 3m.The study was carried out with the aim of getting appropriate dimensions of this system necessary to optimize its performance. Badescu et al, 2007 [7] developed a simple numerical ground heat exchanger model which calculate the ground temperature at the surface and at different depths , The authors concluded that the efficiency of an exchanger depends on several parameters such as pipe depth, dimension of the pipe and its characteristics. Gao et al, 2007 [8] have tested conduction and convection in an arid ground model.…”

Section: Introductionmentioning

confidence: 99%

Parametric Study of to Design an Earth to Air Heat Exchanger with Experimental Validation

Hatraf

Chabane

Brima

et al. 2014

View full text Add to dashboard Cite

Abstract. Geothermal energy uses an air ground exchanger to cool buildings with minimum of energy. The outlet air coming from this exchanger can be directly used for space cooling if its temperature is low enough. In this study we try to evaluate the profile of ground temperature to decide of the depth to bury the exchanger. Through modeling and experimentation, we try to evaluate the performance of a horizontal pipe used for cooling, for this finite differential method which consists on dividing the length of the exchanger on multiple equal segments and by the knowledge of initial and boundary conditions the profile of the air temperature is that carry out. The authors conclude that many parameters influence the performance of earth to air exchanger such as the nature of the ground, the ground depth diameter of the duct and the throughput flow.

show abstract

“…Finally, in the solar radiation, the influence of solar radiation in the tiled roof degradation, the development of radiance and luminance sky models and the calculation of the direct, diffuse and reflected incident solar radiation, were made. Kummert et al (2000), Hien and Istiadji (2003), Badescu and Sicre (2003a, b), Lukic (2003), Chou (2004), Igawa et al (2004), Manz and Frank (2005), Holck and Rosenfeld (2005), Flor et al (2005), Filippín et al (2005), Cheng et al (2005), Künzel et al (2005), Badescu (2005), Bourgeois (2005), Persson et al (2006), Badescu and Staicovici (2006), Filippín and Beascochea (2007), Badescu (2007), Larsen et al (2008), Omer (2008), Wang et al (2009), Chan et al (2010), and others, are some examples of these kinds of applications.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of passive and active solar strategies in buildings with complex topology

Conceição

Lúcio²

2010

Build. Simul.

View full text Add to dashboard Cite

In this paper a numerical software, that simulates the building thermal behaviour with complex topology in transient conditions, was developed and used in the study of kindergarten thermal response and the occupants' thermal comfort and air quality in Mediterranean conditions. In this numerical model a new building three-dimensional grid generation philosophy, closer to the reality, that considers the building and the surrounding buildings used in the long and short-wave calculus, the external and internal shading devices, the energy and mass balance integral equations philosophy generated by the building geometry, the equation system resolution done by the Runge-Kutta-Felberg with error control and the human thermal comfort level evaluated through human thermo-physiology, are developed.In the simulation, with a real occupation cycle, the compartments, the building opaque bodies, the building transparent bodies, and the external shading devices were considered. In passive strategies the kindergarten is equipped with multiple inclined aluminium shading devices placed above the transparent windows level and in front to the transparent door facing south, removable inclined tissue shading devices placed in front to the transparent windows facing east, and horizontal fabrics shading devices placed above the transparent panel levels facing south, south-west and west.In this study, made with natural and forced ventilation, the summer and winter conditions were used. In summer conditions, the forced ventilation active strategies in all spaces with cold air from the external environment during the night, and in occupied spaces with stored cold air from the underground space were used. In winter conditions forced ventilation from an internal greenhouse, to heat the internal occupied cold spaces, was used.

show abstract

Simple and accurate model for the ground heat exchanger of a passive house

Cited by 120 publications

References 16 publications

Experimental investigation and CFD simulation of multi-pipe earth-to-air heat exchangers (EAHEs) flow performance

Experimental investigation and CFD simulation of multi-pipe earth-to-air heat exchangers (EAHEs) flow performance

Parametric Study of to Design an Earth to Air Heat Exchanger with Experimental Validation

Numerical simulation of passive and active solar strategies in buildings with complex topology

Contact Info

Product

Resources

About