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Descripción
This paper focus on two low energy systems, thermo-active building systems (TABS) and energy foundations, both with the common use of building concrete elements, that are already required for structural reasons, but which simultaneously work as heat exchangers. The aim of this paper is study the mechanical behaviour of these concrete elements due to the inclusion of polyethylene pipe heat exchangers cast directly in their concrete core and the influence of fluids flowing inside at a moderate temperature. Cylindrical and cubic specimens have been manufactured in order to study the influence of temperature through compression and pull-out tests and the influence the embedded pipes in different positions using compression tests. The analysis of results shows that mechanical properties decrease when the temperature increases in both types of concrete (H-25 and H-30), with a sharper decline in H-30 specimens. The layout of the pipes reduces the mechanical resistance of the structural elements regardless of the type of concrete used, being the most damaging position the one perpendicular to the load. Therefore, thermo-active reinforced concrete elements best behaviour occurs when polyethylene pipes are placed in parallel to the load, and the temperature of the fluids in the pipes is lower than 70ºC.
Internacional	Si
JCR del ISI	Si
Título de la revista	Magazine of Concrete Research
ISSN	0024-9831
Factor de impacto JCR	0,563
Información de impacto	Datos JCR del año 2012
Volumen	67(6)
DOI	http://dx.doi.org/10.1680/macr.14.00237
Número de revista	67
Desde la página	271
Hasta la página	281
Mes	NOVIEMBRE
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• Autor: Alfonso Cobo Escamilla (UPM)
• Autor: Maria Isabel Prieto Barrio (UPM)
• Autor: Inmaculada Martinez Perez (UPM)
• Autor: Maria Esther Moreno Fernandez (UPM)

• Creador: Departamento: Construcción y Tecnología Arquitectónicas
• Departamento: Tecnología de la Edificación
• Departamento: Construcciones Arquitectónicas y su Control