Browsing by Author "Romero, A."
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Item Analysis of the solidification and properties of plaster cast al based composites(2012-03-01) Egizabal, P.; Romero, A.; Torregaray, A.; Tecnalia Research & InnovationThe present work deals with aspects related to the solidification and properties of an Al-Si10Mg/SiC 20p alloy cast in plaster moulds. Several strategies were followed to shorten its solidification time such as embedding copper tubes into the mould to make circulate cooling fluids immediately after the casting step. The analysis of cooling curves provided valuable information on the effect of the particles on solidification events. The precipitation of different phases of the MMC takes place at higher temperatures and earlier than in the case of the non reinforced alloy. Particles affect the solidification pattern of the alloy and play a noticeable role in the precipitation of the phases. This fact should be taken into account to design the filling and feeding systems correctly and for modelling and processing parameters as well as in thermal treatments. Eventually samples were obtained under the highest solidification rate conditions to analyse the microstructure and tensile properties of the MMC material.Item City planning and energy efficiency: Towards an integrated urban design and planning process(WITPress, 2009) Barreiro, E.; Belausteguigoitia, J.; Perea, E.; Rodríguez, R.; Romero, A.; Turienzo, E.; GENERAL; DIGITAL ENERGY; Tecnalia Research & Innovation; EDIFICACIÓN DE ENERGÍA POSITIVA; ADAPTACIÓN AL CAMBIO CLIMÁTICOUrban environments are great consumers of energy. In Spain, the housingservices sector is responsible for almost 30% of the total energy consumption. There are many initiatives towards the reduction of energy consumption in buildings. However, many of the alternatives are diminished due to a lack of a holistic approach in the planning, design, and building of new communities. This paper reports a new methodology that integrates concepts of energy efficiency in the overall planning and design process. A community in Toledo, Spain, serves as a case study to extract conclusions later applicable to other areas. The methodology evaluates energy efficiency solutions at different scales and stages within the planning and building process of both neighbourhood and buildings. It then revises the planning and building protocols for the optimization of the community's energy efficiency, contemplating their practical applicability. With this, the proposed integrated methodology is improved and adapted to a widereaching design of energy efficient urban communities.Item Multiscale building modelling and energy simulation support tools(CRC Press/Balkema, 2016) Romero, A.; Izkara, J. L.; Mediavilla, A.; Prieto, I.; Pérez, J.; Christodoulou, Symeon E.; Scherer, Raimar; EDIFICACIÓN DE ENERGÍA POSITIVA; Tecnalia Research & Innovation; LABORATORIO DE TRANSFORMACIÓN URBANA; DIGITALIZACIÓN Y AUTOMATIZACIÓN DE LA CONSTRUCCIÓN; SGBuilding and district modelling (BIM, CityGML…) are key technologies for the deployment of energy efficiency strategies at building and district level, from the initial stages of planning and design to the operation and maintenance ones. These technologies allow satisfying the interoperability requirements that facilitate the cooperation among the multiple stakeholders and provide the framework to develop more intelligent tools. This paper introduces five complementary European R&D projects in which TECNALIA is collaborating, very good examples of innovative systems based on these concepts. MOEEBIUS enhances passive and active building elements modelling approaches enabling improved building energy performance simulations. HOLISTEEC focuses on building multi-physical simulations considering the neighborhood context. FASUDIR exploits the high potential of GIS tools for urban sustainability analysis and accurate building energy performance evaluation. EFFESUS integrates district and building scales in historic districts. OPTEEMAL develops a platform at district level, based on an IPD approach.Item Multiscale information management for sustainable districts rehabilitation: EFFESUS and FASUDIR projects(CRC Press/Balkema, 2015) Egusquiza, A.; Prieto, I.; Romero, A.; LABORATORIO DE TRANSFORMACIÓN URBANA; Tecnalia Research & Innovation; EDIFICACIÓN DE ENERGÍA POSITIVAThe Sustainable rehabilitation of the existing building stock through an urban and integrated approach is frequently the most sustainable and cost-effective of the strategies. In order to achieve the maximum sustainability potential of the districts these strategies should address all scales, include all domains and involve all stakeholders in the decision making processes. The EFFESUS and FASUDIR projects, partially funded by the 7th FP and both coordinated by Tecnalia, aim to research and develop the knowledge, strategies and tools to meet the challenges of the sustainable rehabilitation from a multiscale perspective. The methodologies and the consequent tools that are being developed in these projects will focus on the initial stage of the rehabilitation process at district level, in which the rehabilitation framework is established, the strategies are defined and the technological solutions are selected. Therefore the objective is to give to the stakeholder the tools for an informed decision regarding energy strategies at urban level.Item Strategies, methods and tools for managing nanorisks in construction(2015-05-26) López de Ipiña, J.M.; Vaquero-Moralejo, Celina; Boutry, D.; Damlencourt, J.F.; Neofytou, P.; Pilou, M.; Jankowska, E.; Larraza, I.; Pina, R.; Fernández, S.; Contreras, S.; Romero, A.; Calderon, M.; Swiezewsk, P.; Otkallo, K.; Pintea, A.; Salazar, C.; Oroz, T.; Hargreaves, B.; Ciobanu, R.; Tabrea, A.; Hazebrouck, B.; Salvi, O.; Stockmann-Juvala, H.; Vaananen, V.; Pui, D. H. Y.; Thompson, Drew; Tecnalia Research & Innovation; SMART_MON; PRINTEXThis paper presents a general overview of the work carried out by European project SCAFFOLD (GA 280535) during its 30 months of life, with special emphasis on risk management component. The research conducted by SCAFFOLD is focused on the European construction sector and considers 5 types of nanomaterials (TiO2, SiO2, carbon nanofibres, cellulose nanofibers and nanoclays), 6 construction applications (Depollutant mortars, selfcompacting concretes, coatings, self-cleaning coatings, fire resistant panels and insulation materials) and 26 exposure scenarios, including lab, pilot and industrial scales. The document focuses on the structure, content and operation modes of the Risk Management Toolkit developed by the project to facilitate the implementation of "nano-management" in construction companies. The tool deploys and integrated approach OHSAS 18001 - ISO 31000 and is currently being validated on 5 industrial case studies.