Browsing by UPNA Author "Martínez Echeverri, Álvaro"

Now showing items 1-19 of 19

    • Assessing the reliability of current simulation of thermoelectric heat pumps for nearly zero energy buildings: expected deviations and general guidelines 

      Martínez Echeverri, Álvaro Upna Orcid; Díaz de Garayo, Sergio; Aranguren Garacochea, Patricia Upna Orcid; Astrain Ulibarrena, David Upna Orcid (Elsevier, 2019)   Artículo / Artikulua  OpenAccess
      This paper makes evident that a rigorous review of simulation methods for thermoelectric heat pumps in nearly-zero energy buildings is needed, as incoherent results during verification and validation of simulation models ...

    • Computational study on the thermal influence of the components of a thermoelectric ice maker on the ice production 

      Rodríguez García, Antonio Upna Orcid; Astrain Ulibarrena, David Upna Orcid; Martínez Echeverri, Álvaro Upna Orcid; González Vian, José Upna (Springer USTMSIEEE, 2012)   Artículo / Artikulua  OpenAccess
      The main objective of this paper is to study the thermal resistances of two components of a thermoelectric ice maker installed in a no-frost refrigerator, in order to optimize the ice production. This study is conducted ...

    • Development and experimental validation of a thermoelectric test bench for laboratory lessons 

      Rodríguez García, Antonio Upna Orcid; Astrain Ulibarrena, David Upna Orcid; Martínez Echeverri, Álvaro Upna Orcid; Aranguren Garacochea, Patricia Upna Orcid; Pérez Artieda, Miren Gurutze Upna Orcid (OmniaScience, 2013)   Artículo / Artikulua  OpenAccess
      The refrigeration process reduces the temperature of a space or a given volume while the power generation process employs a source of thermal energy to generate electrical power. Because of the importance of these two ...

    • Experimental and computational study on thermoelectric generators using thermosyphons with phase change as heat exchangers 

      Araiz Vega, Miguel Upna Orcid; Martínez Echeverri, Álvaro Upna Orcid; Astrain Ulibarrena, David Upna Orcid; Aranguren Garacochea, Patricia Upna Orcid (Elsevier, 2017)   Artículo / Artikulua  OpenAccess
      An important issue in thermoelectric generators is the thermal design of the heat exchangers since it can improve their performance by increasing the heat absorbed or dissipated by the thermoelectric modules. Due to its ...

    • Experimental investigation of the applicability of a thermoelectric generator to recover waste heat from a combustion chamber 

      Aranguren Garacochea, Patricia Upna Orcid; Astrain Ulibarrena, David Upna Orcid; Rodríguez García, Antonio Upna Orcid; Martínez Echeverri, Álvaro Upna Orcid (Elsevier, 2015)   Artículo / Artikulua  OpenAccess
      A thermoelectric generator prototype has been built; it produces 21.56 W of net power, the produced thermoelectric power minus the consumption of the auxiliary equipment, using an area of 0.25 m2 (approximately 100 W/m2). ...

    • Experimental study and optimization of thermoelectric-driven autonomous sensors for the chimney of a biomass power plant 

      Rodríguez García, Antonio Upna Orcid; Astrain Ulibarrena, David Upna Orcid; Martínez Echeverri, Álvaro Upna Orcid; Aranguren Garacochea, Patricia Upna Orcid (2014)   Artículo / Artikulua  OpenAccess
      In the work discussed in this paper a thermoelectric generator was developed to harness waste heat from the exhaust gas of a boiler in a biomass power plant and thus generate electric power to operate a flowmeter installed ...

    • Heat exchangers for thermoelectric devices 

      Astrain Ulibarrena, David Upna Orcid; Martínez Echeverri, Álvaro Upna Orcid (InTechOpen, 2012)   Capítulo de libro / Liburuen kapitulua  OpenAccess
      This chapter shows in the first place the influence of heat exchangers on the performance of both thermoelectric generation and thermoelectric refrigeration devices. Then, there are presented different types of heat ...

    • Heat pipes thermal performance for a reversible thermoelectric cooler-heat pump for a nZEB 

      Aranguren Garacochea, Patricia Upna Orcid; Díaz de Garayo, Sergio; Martínez Echeverri, Álvaro Upna Orcid; Araiz Vega, Miguel Upna Orcid; Astrain Ulibarrena, David Upna Orcid (Elsevier, 2019)   Artículo / Artikulua  OpenAccess
      The nZEB standards reduce the energy demand of these buildings to a minimum, obtaining this little energy from renewable resources. Taking these aspect into consideration, a thermoelectric cooler-heat pump is proposed to ...

    • Improvement of a thermoelectric and vapour compression hybrid refrigerator 

      Astrain Ulibarrena, David Upna Orcid; Martínez Echeverri, Álvaro Upna Orcid; Rodríguez García, Antonio Upna Orcid (Elsevier, 2012)   Artículo / Artikulua  OpenAccess
      This paper presents the improvement in the performance of a domestic hybrid refrigerator that combines vapour compression technology for the cooler and freezer compartments, and thermoelectric technology for a new compartment. ...

    • Influence of temperature and aging on the thermal contact resistance in thermoelectric devices 

      Rodríguez García, Antonio Upna Orcid; Pérez Artieda, Miren Gurutze Upna Orcid; Beisti Antoñanzas, Irene Upna Orcid; Astrain Ulibarrena, David Upna Orcid; Martínez Echeverri, Álvaro Upna Orcid (Springer, 2020)   Artículo / Artikulua  OpenAccess
      During thermal design in the first phases development, thermoelectric systems, such as thermoelectric generators, the most important parameter affecting the performance is thermal resistance of the components. This paper ...

    • Modelización y desarrollo experimental de un sistema de generación termoeléctrica basado en efecto Seebeck. Aplicación a gases de escape en calderas de combustión 

      Araiz Vega, Miguel Upna Orcid (2018)   Tesis doctoral / Doktoretza tesia  OpenAccess
      La situación energética actual y todos los problemas medioambientales, políticos y económicos asociados a ella, hacen cada vez más necesaria una optimización de los sistemas de generación eléctrica y una incorporación ...

    • Net thermoelectric power generation improvement through heat transfer optimization 

      Aranguren Garacochea, Patricia Upna Orcid; Astrain Ulibarrena, David Upna Orcid; Rodríguez García, Antonio Upna Orcid; Martínez Echeverri, Álvaro Upna Orcid (Elsevier, 2017)   Artículo / Artikulua  OpenAccess
      Thermoelectric generation contributes to obtain a more sustainable energetic system giving its potential to harvest waste heat and convert it into electric power. In the present study a computational optimal net generation ...

    • Prospects of waste-heat recovery from a real industry using thermoelectric generators: economic and power output analysis 

      Araiz Vega, Miguel Upna Orcid; Casi Satrústegui, Álvaro Upna Orcid; Catalán Ros, Leyre Upna Orcid; Martínez Echeverri, Álvaro Upna Orcid; Astrain Ulibarrena, David Upna Orcid (Elsevier, 2020)   Artículo / Artikulua  OpenAccess
      One of the options to reduce industrial energy costs and the environmental impact is to recover the waste-heat produce in some processes. This paper proposes the use of thermoelectric generators at a stone wool manufacturing ...

    • 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 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 ...

    • 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 ...

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