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    • Simulación y procesado de aleaciones de aluminio mediante estirado en canal angular constante (ECAD) 

      Luis Pérez, Carmelo Upna; Garcés, Y. Upna (CENIM, 2002)   Artículo / Artikulua  OpenAccess
      En este trabajo se estudia el proceso denominado ECAD (Equal Channel Angular Drawing) que consiste en hacer atravesar un material a través de una matriz de sección transversal constante, que presenta un ángulo comprendido, ...

    • Strain mapping and nanocrystallite size determination by neutron diffraction in an aluminum alloy (AA5083) severely plastically deformed through equal channel angular pressing 

      González Crespo, Pedro Antonio Upna; Luis Pérez, Carmelo Upna; Hughes, Darren J.; Turrillas, X. (Hindawi, 2013)   Artículo / Artikulua  OpenAccess
      Six specimens of an aluminum alloy (AA-5083) extruded by Equal Channel Angular Pressing following two different routes plus a blank sample were examined with a neutron radiation of 1.5448 ˚ A. Macrostrain maps from the ...

    • Study of a complete thermoelectric generator behavior including water-to-ambient heat dissipation on the cold side 

      Aranguren Garacochea, Patricia Upna Orcid; Astrain Ulibarrena, David Upna Orcid; Martínez Echeverri, Álvaro Upna Orcid (Springer USTMSIEEE, 2014)   Artículo / Artikulua  OpenAccess
      The reduction of the thermal resistances of the heat exchangers of a thermoelectric generation system (TEG), leads to a significant increase in the TEG efficiency. For the cold side of a thermoelectric module (TEM), a wide ...

    • Study of corrosion in a biomass boiler 

      Berlanga Labari, Carlos Upna Orcid; Ruiz Bermejo, José Antonio Upna Orcid (Hindawi, 2013)   Artículo / Artikulua  OpenAccess
      Biomass plants, apart from producing energy, help to reduce CO2(g) emissions. One of the biggest problems for their development is superheater corrosion due to fuel corrosivity, especially of the straw. This limits both ...

    • Study of thermoelectric systems applied to electric power generation 

      Rodríguez García, Antonio Upna Orcid; González Vian, José Upna; Astrain Ulibarrena, David Upna Orcid; Martínez Echeverri, Álvaro Upna Orcid (Elsevier, 2009)   Artículo / Artikulua  OpenAccess
      A computational model has been developed in order to simulate the thermal and electric behaviour of the thermoelectric generators. This model solves the non linear system of equations of the thermoelectric and heat transfer ...

    • Symbolic multibody methods for real-time simulation of railway vehicles 

      Ros Ganuza, Javier Upna Orcid; Plaza Puértolas, Aitor Upna Orcid; Iriarte Goñi, Xabier Upna Orcid; Pintor Borobia, Jesús María Upna Orcid (Springer, 2018)   Artículo / Artikulua  OpenAccess
      In this work, recently developed state-of-the-art symbolic multibody methods are tested to accurately model a complex railway vehicle. The model is generated using a symbolic implementation of the principle of virtual ...

    • A theoretical model of the endothelial cell morphology due to different waveforms 

      Sáez, Pablo; Malvè, Mauro Upna Orcid; Martínez, Miguel Ángel (Elsevier, 2015)   Artículo / Artikulua  OpenAccess
      Endothelial cells are key units in the regulatory biological process of blood vessels. They represent an interface to transmit variations on the fluid dynamic changes. They are able to adapt its cytoskeleton, by means of ...

    • Thermoelectric generators for waste heat harvesting: a computational and experimental approach 

      Aranguren Garacochea, Patricia Upna Orcid; Araiz Vega, Miguel Upna Orcid; Astrain Ulibarrena, David Upna Orcid; Martínez Echeverri, Álvaro Upna Orcid (Elsevier, 2017)   Artículo / Artikulua  OpenAccess
      Waste heat generation has a widespread presence into daily applications, however, due to the low-temperature grade which presents, its exploitation with the most common technologies is complicated. Thermoelectricity ...

    • Thermoelectric self-cooling for power electronics: increasing the cooling power 

      Martínez Echeverri, Álvaro Upna Orcid; Astrain Ulibarrena, David Upna Orcid; Aranguren Garacochea, Patricia Upna Orcid (Elsevier, 2016)   Artículo / Artikulua  OpenAccess
      Thermoelectric self-cooling was firstly conceived to increase, without electricity consumption, the cooling power of passive cooling systems. This paper studies the combination of heat pipe exchangers and thermoelectric ...

    • Thermoelectric-driven autonomous sensors for a biomass power plant 

      Rodríguez García, Antonio Upna Orcid; Astrain Ulibarrena, David Upna Orcid; Martínez Echeverri, Álvaro Upna Orcid; Gubía Villabona, Eugenio Upna Orcid; Sorbet Presentación, Francisco Javier Upna (Springer USTMSIEEE, 2013)   Artículo / Artikulua  OpenAccess
      This work presents the design and development of a thermoelectric generator intended to harness waste heat in a biomass power plant, and generate electric power to operate sensors and the required electronics for wireless ...

    • Zero-power-consumption thermoelectric system to prevent overheating in solar collectors 

      Martínez Echeverri, Álvaro Upna Orcid; Astrain Ulibarrena, David Upna Orcid; Rodríguez García, Antonio Upna Orcid (Elsevier, 2014)   Artículo / Artikulua  OpenAccess
      Highly promoted by the European Union Climate and Energy Package for 2020, solar collectors stand out as the most promising alternative to meet water heating demands. One of the most limiting problems in these systems ...
      El Repositorio ha recibido la ayuda de la Fundación Española para la Ciencia y la Tecnología para la realización de actividades en el ámbito del fomento de la investigación científica de excelencia, en la Línea 2. Repositorios institucionales (convocatoria 2020-2021).
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