Analysis of the technical, environmental and economic potential of phase change materials (PCM) for root zone heating in Mediterranean greenhouses
Llorach-Massana, Pere (Universitat Autònoma de Barcelona. Institut de Ciència i Tecnologia Ambientals)
Peña, Javier (Peña Andrés) (Universitat de Vic - Universitat Central de Catalunya. Elisava, Facultat de Disseny i Enginyeria)
Rieradevall, Joan (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Montero Camacho, Juan Ignacio (Institut de Recerca i Tecnologia Agroalimentàries)

Fecha:	2017
Resumen:	Root zone heating systems offer increasing crops quality and productivity. However, these systems are based on the use of nonrenewable fuels. This paper reports on a study of different design solutions for a root zone heating system, based on thermal energy storage with PCM. The objective of the study was to define, through multiple experiments, the most efficient PCM melting/freezing temperature and location with respect to the substrate (i. e. , under the substrate) for the application under study; as well as, to determine the system's environmental and economic feasibility, with life cycle assessment and life cycle cost methodologies. Results show that the best melting temperature for the application under study is 15 °C. To increase the efficiency of the system, PCMs may be macro encapsulated and wrap the entire perlite bag. Moreover, it seems that PCMs are far to substitute conventional root zone heating systems because it does not provided enough heat during nights. Nevertheless, PCMs can help to reduce the operation time of conventional systems. Based on one night results it seem that PCM could provide annual saving of between 22 and 30 kg of eq. CO2/ha·day. However, it does not seem to be feasible if PCM prices (8€/kg) do not decrease significantly.
Ayudas:	Ministerio de Economía y Competitividad CTM2013-47067-C2-1-R
Nota:	Unidad de excelencia María de Maeztu MdM-2015-0552
Nota:	Altres ajuts: the Catalan Government, La Generalitat de Catalunya, for awarding a research scholarship (FI-AGUAR 2015) to Pere Llorach Massana ; INIA RTA2012-00039-C02-01
Derechos:	Tots els drets reservats.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió acceptada per publicar
Materia:	Phase change materials (PCM) ; Root zone heating ; Soilless crops ; Environmental assessment ; Economic assessment
Publicado en:	Renewable Energy, Vol. 103 (April 2017) , p. 570-581, ISSN 1879-0682

DOI: 10.1016/j.renene.2016.11.040

Postprint 22 p, 1.6 MB

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Documentos de investigación > Documentos de los grupos de investigación de la UAB > Centros y grupos de investigación (producción científica) > Ciencias > Institut de Ciència i Tecnologia Ambientals (ICTA) > Sostenibilidad y Prevención Ambiental (Sostenipra)
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