Browsing by Author "Uriarte, Amaia"
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Item Calibration procedures for multidimensional heat transfer models based on on-site experimental data(2015-11-01) Garay, Roberto; Uriarte, Amaia; Apraiz, Inés; Martinez, Roberto Garay; Arrien, Amaia Uriarte; Egaña, Ines Apraiz; Tecnalia Research & Innovation; EDIFICACIÓN DE ENERGÍA POSITIVAAn experimental and numerical approach to the characterization of thermal bridges is presented, based on on-site taken measurements. Commonly on-site applied numerical thermal assessments perform one-dimensional heat transfer analysis over planar elements such as facades. However, it is well known that within thermal bridges in a building one-dimensional heat transfer analysis cannot be applied. A procedure is proposed, based on the creation of a numerical 2D thermal model which is calibrated against experimental data from several temperature and heat flux sensors which are located at specific points in the thermal bridge elements. Results of one particular implementation of this method are discussed.Item Comparison between Energy Simulation and Monitoring Data in an Office Building(2021-12-30) Martin-Escudero, Koldobika; Atxalandabaso, Garazi; Erkoreka, Aitor; Uriarte, Amaia; Porta, Matteo; EDIFICACIÓN DE ENERGÍA POSITIVA; Tecnalia Research & InnovationOne of the most important steps in the retrofitting process of a building is to understand its pre-retrofitting stage energy performance. The best choice for carrying this out is by means of a calibrated building energy simulation (BES) model. Then, the testing of different retrofitting solutions in the validated model allows for quantifying the improvements that may be obtained, in order to choose the most suitable solution. In this work, based on the available detailed building drawings, constructive details, building operational data and the data sets obtained on a minute basis (for a whole year) from a dedicated energy monitoring system, the calibration of an in-use office building energy model has been carried out. It has been possible to construct a detailed white box model based on Design Builder software. Then, comparing the model output for indoor air temperature, lighting consumption and heating consumption against the monitored data, some of the building envelope parameters and inner building inertia of the model were fine tuned to obtain fits fulfilling the ASHRAE criteria. Problems found during this fitting process and how they are solved are explained in detail. The model calibration is firstly performed on an hourly basis for a typical winter and summer week; then, the whole year results of the simulation are compared against the monitored data. The results show a good agreement for indoor temperature, lighting and heating consumption compared with the ASHRAE criteria for the mean bias error (MBE).Item Energy efficiency achievements in 5 years through experimental research in KUBIK(2015-06) Garay, Roberto; Chica, José Antonio; Apraiz, Inés; Campos, José María; Tellado, Borja; Uriarte, Amaia; Sánchez, V.; Tecnalia Research & Innovation; SG; DIGITAL ENERGY; EDIFICACIÓN DE ENERGÍA POSITIVAThe European construction sector (a fragmented SMEs dominated business with high economic and environmental impact and high technological inertia) faces a major challenge to reduce the emissions by almost 90% in 2050. This requires new innovative solutions and services to be rapidly implemented in the market. Research Infrastructures that give support for later-stage developments (high Technology Readiness Levels) can play a relevant role in both the technological development and market introduction of construction products for energy efficient buildings. The following paper describes such an infrastructure (KUBIKby (Tecnalia)) located in Bilbao (Spain) and its major outcomes in the period 2011-2015.Item Passive solar collector module for building facades (DE)(2009-12-29) Amundarain, Aitor; Campos, José María; Chica, José Antonio; Meno, Sandra; Uriarte, Amaia; Garay, Roberto; Herrero, Julio Cesar; Oliver, Marc; Pérez, Sergio; Elguezabal, Peru; Romero, Ander; Apraiz, InésThe invention relates to a passive solar collector module for building facades comprising a transparent panel and a heat absorbing panel, separated from one another by an air chamber and assembled in a frame; an upper air conduit for communicating the air chamber with an area close to the ceiling of a story of a building; a lower air conduit for communicating the air chamber with an area close to the floor of a story of a building; an environmental air inlet in the lower part of the module and a heated air outlet and in the upper part of the module; a first air directing system operable such that in a first position it blocks the air outlet and in a second position it blocks the upper air conduit; a second air directing system operable such that in a first position it blocks the lower air conduit, in a second position it blocks the air flow towards the air outlet and in a third position it does not block either the lower air conduit or the air flow towards the air outlet.Item Passive solar collector module for building facades (EPO)(2009-12-29) Amundarain, Aitor; Campos, José María; Chica, José Antonio; Meno, Sandra; Uriarte, Amaia; Garay, Roberto; Herrero, Julio Cesar; Oliver, Marc; Pérez, Sergio; Elguezabal, Peru; Romero, Ander; Apraiz, InésThe invention relates to a passive solar collector module for building facades comprising a transparent panel and a heat absorbing panel, separated from one another by an air chamber and assembled in a frame; an upper air conduit for communicating the air chamber with an area close to the ceiling of a story of a building; a lower air conduit for communicating the air chamber with an area close to the floor of a story of a building; an environmental air inlet in the lower part of the module and a heated air outlet and in the upper part of the module; a first air directing system operable such that in a first position it blocks the air outlet and in a second position it blocks the upper air conduit; a second air directing system operable such that in a first position it blocks the lower air conduit, in a second position it blocks the air flow towards the air outlet and in a third position it does not block either the lower air conduit or the air flow towards the air outlet.Item Passive solar collector module for building facades (ES)(2009-12-29) Amundarain, Aitor; Campos, José María; Chica, José Antonio; Meno, Sandra; Uriarte, Amaia; Garay, Roberto; Herrero, Julio Cesar; Oliver, Marc; Pérez, Sergio; Elguezabal, Peru; Romero, Ander; Apraiz, InésThe invention relates to a passive solar collector module for building facades comprising a transparent panel and a heat absorbing panel, separated from one another by an air chamber and assembled in a frame; an upper air conduit for communicating the air chamber with an area close to the ceiling of a story of a building; a lower air conduit for communicating the air chamber with an area close to the floor of a story of a building; an environmental air inlet in the lower part of the module and a heated air outlet and in the upper part of the module; a first air directing system operable such that in a first position it blocks the air outlet and in a second position it blocks the upper air conduit; a second air directing system operable such that in a first position it blocks the lower air conduit, in a second position it blocks the air flow towards the air outlet and in a third position it does not block either the lower air conduit or the air flow towards the air outlet.Item Passive solar collector module for building facades (FR)(2009-12-29) Amundarain, Aitor; Campos, José María; José Antonio, Chica; Meno, Sandra; Uriarte, Amaia; Garay, Roberto; Herrero, Julio Cesar; Oliver, Marc; Pérez, Sergio; Elguezabal, Peru; Romero, Ander; Apraiz, InésThe invention relates to a passive solar collector module for building facades comprising a transparent panel and a heat absorbing panel, separated from one another by an air chamber and assembled in a frame; an upper air conduit for communicating the air chamber with an area close to the ceiling of a story of a building; a lower air conduit for communicating the air chamber with an area close to the floor of a story of a building; an environmental air inlet in the lower part of the module and a heated air outlet and in the upper part of the module; a first air directing system operable such that in a first position it blocks the air outlet and in a second position it blocks the upper air conduit; a second air directing system operable such that in a first position it blocks the lower air conduit, in a second position it blocks the air flow towards the air outlet and in a third position it does not block either the lower air conduit or the air flow towards the air outlet.Item Passive solar collector module for building facades (GB)(2009-12-29) Amundarain, Aitor; Campos, José María; Chica, José Antonio; Meno, Sandra; Uriarte, Amaia; Garay, Roberto; Herrero, Julio Cesar; Oliver, Marc; Pérez, Sergio; Elguezabal, Peru; Romero, Ander; Apraiz, InésThe invention relates to a passive solar collector module for building facades comprising a transparent panel and a heat absorbing panel, separated from one another by an air chamber and assembled in a frame; an upper air conduit for communicating the air chamber with an area close to the ceiling of a story of a building; a lower air conduit for communicating the air chamber with an area close to the floor of a story of a building; an environmental air inlet in the lower part of the module and a heated air outlet and in the upper part of the module; a first air directing system operable such that in a first position it blocks the air outlet and in a second position it blocks the upper air conduit; a second air directing system operable such that in a first position it blocks the lower air conduit, in a second position it blocks the air flow towards the air outlet and in a third position it does not block either the lower air conduit or the air flow towards the air outlet.Item Passive solar collector module for building facades (IT)(2009-12-29) Amundarain, Aitor; Campos, José María; Chica, José Antonio; Meno, Sandra; Uriarte, Amaia; Garay, Roberto; Herrero, Julio Cesar; Oliver, Marc; Pérez, Sergio; Elguezabal, Peru; Romero, Ander; Apraiz, InésThe invention relates to a passive solar collector module for building facades comprising a transparent panel and a heat absorbing panel, separated from one another by an air chamber and assembled in a frame; an upper air conduit for communicating the air chamber with an area close to the ceiling of a story of a building; a lower air conduit for communicating the air chamber with an area close to the floor of a story of a building; an environmental air inlet in the lower part of the module and a heated air outlet and in the upper part of the module; a first air directing system operable such that in a first position it blocks the air outlet and in a second position it blocks the upper air conduit; a second air directing system operable such that in a first position it blocks the lower air conduit, in a second position it blocks the air flow towards the air outlet and in a third position it does not block either the lower air conduit or the air flow towards the air outlet.Item Passive solar collector module for building facades (PCT)(2009-12-29) Amundarain, Aitor; Campos, José María; Chica, José Antonio; Meno, Sandra; Uriarte, Amaia; Garay, Roberto; Herrero, Julio Cesar; Oliver, Marc; Pérez, Sergio; Elguezabal, Peru; Romero, Ander; Apraiz, InésThe invention relates to a passive solar collector module for building facades comprising a transparent panel and a heat absorbing panel, separated from one another by an air chamber and assembled in a frame; an upper air conduit for communicating the air chamber with an area close to the ceiling of a story of a building; a lower air conduit for communicating the air chamber with an area close to the floor of a story of a building; an environmental air inlet in the lower part of the module and a heated air outlet and in the upper part of the module; a first air directing system operable such that in a first position it blocks the air outlet and in a second position it blocks the upper air conduit; a second air directing system operable such that in a first position it blocks the lower air conduit, in a second position it blocks the air flow towards the air outlet and in a third position it does not block either the lower air conduit or the air flow towards the air outlet.Item Performance assessment of thermal bridge elements into a full scale experimental study of a building façade(2014-12) Garay, Roberto; Uriarte, Amaia; Apraiz, Inés; Tecnalia Research & Innovation; EDIFICACIÓN DE ENERGÍA POSITIVAIn this paper, an experimental and numerical approach to the characterization of thermal bridges is presented. The need for this characterization was found within an experimental study in a 2 floor high facade. This facade was constructed with 3 concrete elements which were placed in it to produce a similar thermal bridge effect to the one created by floor slabs traditional building construction in Spain. Commonly applied thermal assessments perform one-dimensional heat transfer analysis over planar elements such as the facades studied in this experiment. However, it is well known that thermal bridges are locations in buildings where one-dimensional heat transfer analysis cannot be applied. This problem was approached by creating a numerical 2D thermal model which was calibrated against experimental data from several temperature and heat flux sensors which were located at specific points in the thermal bridge elements.Item “Plug and play” modular façade construction system for building renovation to achieve nearly Zero Energy Building (nZEB)(Architectural Science Association, 2020) Torres, J.; Garay-Martinez, Roberto; Torrens-Galdiz, J. Ignacio; Uriarte, Amaia; Pracucci, A.; Casadei, O.; Magnani, S.; Arroyo, N.; Cea, A.M.; Tecnalia Research & InnovationFollowing energy performance improvement policies, there is a need for the massive renovation of the European building stock. The prevalence of multi-rise buildings with concrete structure and poor thermal performance offers a significant opportunity for renovation packages that facilitate the improvement of the building fabric, with its insulation, air-tightness and integration of building services and solar technologies. The RenoZEB project develops a "plug and play" modular facade construction system answering to this need. This prefabricated plug and play modular system has been tested by reproducing the holistic methodology and new technologies in the market by means of real and virtual demonstrators. The applicability and effectiveness of the methodology has been tested by means of a full-scale mock-up system has been constructed and installed in the KUBIK by Tecnalia test facility. The design, construction, manufacture & installation cycle has been tested. Its applicability for a real construction project for a multi-rise residential building in Spain is presented.Item SOLUCIONES SUPERAISLANTES PARA LA REHABILITACIÓN ENERGÉTICA POR EL INTERIOR DE LOS EDIFICIOS(Congreso Euro-Americano REHABEND 2016, 2016-05-24) Garay, Roberto; Uriarte, AmaiaLos requisitos prestacionales para el aislamiento térmico en la edificación se están incrementando mediante el endurecimiento progresivo de la reglamentación técnica de la edificación en los países desarrolados. Estos requisitos son obligados no sólo para edificios de nueva planta sino también para edificios a rehabilitar, en los que la disponibilidad de espacio es muchas veces escasa. En este contexto, se genera un nicho de mercado para los materiales superaislantes tales como los Aerogeles y los Paneles Aislantes de Vacío (Vacuum Insilation Panels-VIPs), por sus posibilidades para integrarse en soluciones de aislamiento por el interior con sustanciales reducciones del espacio necesario. Sin embargo, la implementación de estos materiales a gran escala implica el desarrollo y actualización de sistemas constructivos para garantizar que el global de la solución de aislamiento por el interior garantice altos niveles de aislamiento. Los estudios presentados en este artículo buscan dar respuesta a esta problemática mediante la evaluación de los efectos de puentes térmicos de varias soluciones ligeras para VIPs y aerogeles, además de campañas experimentales en la Infraestructura experimental Kubik by Tecnalia. Las conclusiones fundamentales de estos estudios son que deben evitarse los sistemas que requieran de perfiles metálicos atravesando la capa de material aislante, pues estas incrementan la transferencia de calor a través del sistema en hasta un 40%, y que este problema puede mitigarse substituyendo los metales por materiales composites, o empleando sistemas de anclaje a forjado que eviten el apoyo de los perfiles sobre la fachada. Todo esto se demuestra en ensayos a escala real en los que se verifica que las prestaciones térmicas de estos materiales aislantes permiten sustanciales reducciones de espacio.Item Transición energética hacia distritos sostenibles mediante nodos energéticos renovables(2019) Eguiarte-Fernández, Olaia; de Agustin-Camacho, Pablo; Uriarte, Amaia; Usobiaga, Elena; Tecnalia Research & InnovationActualmente, los edificios son los causantes del 36% de las emisiones de CO2 en Europa, lo que los convierte en uno de los objetivos principales de actuacion local para el cumplimiento de los objetivos energeticos y medioambientales de la Union Europea (UE). Para alcanzar la transicion hacia barrios sostenibles y neutros en carbono es necesaria una regeneracion urbana hacia los edificios de consumo casi nulo (nZEB) o incluso, siendo mas ambiciosos, edificios energeticamente positivos. Para conseguirlo, no solo se deben construir nuevos edificios para que cumplan estas exigencias, sino que el parque edificado actual debe ser rehabilitado con el fin de reducir su demanda energetica, la cual deberá ser cubierta en gran medida por energias renovables. Sin embargo, la integracion y gestion de algunas tecnologias, como la solar termica y fotovoltaica, en los edificios presentan un reto debido a la intermitencia de las mismas, el desajuste entre las horas de generacion y las de consumo en sectores como el residencial, o la disponibilidad de espacio para desplegarlas.Item Vacuum insulation panels in construction solutions for energy efficient retrofitting of buildings. Two case studies in Spain and Sweden(2019-08-15) Uriarte, Amaia; Garai, Iñigo; Ferdinando, Andrew; Erkoreka, Aitor; Nicolas, Olatz; Barreiro, Eneritz; EDIFICACIÓN DE ENERGÍA POSITIVA; Tecnalia Research & Innovation; LABORATORIO DE TRANSFORMACIÓN URBANA; GENERALVacuum insulation panels (VIPs) represent a huge opportunity to achieve nearly zero energy buildings, especially in the retrofitting of existing buildings. VIPs can be applied in conjunction with façade cladding elements, considerably reducing the heat losses or gains from the building by means of very slim wall construction systems or retrofit solutions. However, the fact that VIPs cannot be cut on-site, can be easily damaged during their handling, installation and use and have an envelope that can cause thermal bridging in the junction between panels or when combined with other materials, has hindered their penetration in the construction market. This paper presents two innovative façade retrofitting solutions, a rear ventilated façade and a stud mounted internal solution, that have tackled all these issues and provide thermal transmittances of 0.28 and 0.14 W/m2 K in relatively slim insulation systems of 10 cm widths. Solutions have been installed on the entire façade of two existing buildings located in Bilbao (Spain) and Malmö (Sweden) subjected to an integral rehabilitation process, covering 2100 m2. Buildings energy use have been monitored before and after the renovation, showing energy cuts of around 35% from pre-intervention status. This paper presents the lessons learnt during the design and installation process of the vacuum insulation integrating solutions in the façade of two existing buildings and the thermal performance results achieved after their retrofitting.