Browsing by UPNA Author "Araiz Vega, Miguel"
Now showing items 1-20 of 24
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Auxiliary consumption: a necessary energy that affects thermoelectric generation
Aranguren Garacochea, Patricia
; Araiz Vega, Miguel ; Astrain Ulibarrena, David (Elsevier, 2018)
Artículo / Artikulua 
Waste heat recovery can apply to a wide range of applications, from transportation, or industries to domestic appliances. Thermoelectric generation technology applied to those cases could produce electrical energy and thus ... -
Computational study of geothermal thermoelectric generators with phase change heat exchangers
Catalán Ros, Leyre ; Araiz Vega, Miguel ; Aranguren Garacochea, Patricia ; Astrain Ulibarrena, David (Elsevier, 2020)
Artículo / Artikulua
The use of thermoelectric generators with phase change heat exchangers has demonstrated to be an interesting and environmentally friendly alternative to enhanced geothermal systems (EGS) in shallow hot dry rock fields ... -
Experimental and computational study on thermoelectric generators using thermosyphons with phase change as heat exchangers
Araiz Vega, Miguel ; Martínez Echeverri, Álvaro ; Astrain Ulibarrena, David ; Aranguren Garacochea, Patricia (Elsevier, 2017)
Artículo / Artikulua
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 development of a novel thermoelectric generator without moving parts to harness shallow hot dry rock fields
Alegría Cía, Patricia; Catalán Ros, Leyre ; Araiz Vega, Miguel ; Rodríguez García, Antonio ; Astrain Ulibarrena, David (Elsevier, 2022)
Artículo / Artikulua
Nowadays, geothermal energy in shallow hot dry rock fields is not exploited enough due to the high economic and environmental impact as well as the lack of scalability of the existing technologies. Here, thermoelectricity ... -
Experimental development of a novel thermoelectric generator without moving parts to harness shallow hot dry rock fields
Alegría Cía, Patricia; Rodríguez García, Antonio ; Catalán Ros, Leyre ; Astrain Ulibarrena, David ; Araiz Vega, Miguel (2021)
Contribución a congreso / Biltzarrerako ekarpena
Nowadays, geothermal energy in shallow hot dry rocks is not exploited enough due to the high economic and environmental impact as well as the lack of scalability of the existing technologies. Here, thermoelectricity has a ... -
Experimental evaluation of a transcritical CO2 refrigeration facility working with an internal heat exchanger and a thermoelectric subcooler: performance assessment and comparative
Casi Satrústegui, Álvaro ; Aranguren Garacochea, Patricia ; Araiz Vega, Miguel ; Sánchez, Daniel; Cabello, Ramón; Astrain Ulibarrena, David (Elsevier, 2022)
Artículo / Artikulua
The use of carbon dioxide in transcritical state has become one of the most used solutions to comply with the F-Gas directive and reduce greenhouse gases emissions from refrigeration systems at high ambient temperatures. ... -
Experimental evidence of the viability of thermoelectric generators to power volcanic monitoring stations
Catalán Ros, Leyre ; Garacochea Sáenz, Amaia; Casi Satrústegui, Álvaro ; Araiz Vega, Miguel ; Aranguren Garacochea, Patricia ; Astrain Ulibarrena, David (MDPI, 2020)
Artículo / Artikulua
Although there is an important lack of commercial thermoelectric applications mainly due to their low efficiency, there exist some cases in which thermoelectric generators are the best option thanks to their well-known ... -
Experimental validation and development of an advanced computational model of a transcritical carbon dioxide vapour compression cycle with a thermoelectric subcooling system
Casi Satrústegui, Álvaro ; Aranguren Garacochea, Patricia ; Sánchez, Daniel; Araiz Vega, Miguel ; Cabello, Ramón; Astrain Ulibarrena, David (Elsevier, 2022)
Artículo / Artikulua
The inclusion of a thermoelectric subcooler as an alternative to increment the performance of a vapour compression cycle has been proved promising when properly designed and operated for low-medium power units. In this ... -
Field test of a geothermal thermoelectric generator without moving parts on the Hot Dry Rock field of Timanfaya National Park
Catalán Ros, Leyre ; Alegría Cía, Patricia; Araiz Vega, Miguel ; Astrain Ulibarrena, David (Elsevier, 2023)
Artículo / Artikulua
Although in the last years thermoelectric generators have arisen as a solution to boost geothermal power generation, tests on field are still scarce. The vast majority of the available studies focus on computational ... -
Gamification and a low-cost laboratory equipment aimed to boost vapor compresion refrigeration learning
Aranguren Garacochea, Patricia ; Sánchez García-Vacas, Daniel; Casi Satrústegui, Álvaro ; Araiz Vega, Miguel ; Catalán Ros, Leyre (OmniaScience, 2022)
Artículo / Artikulua
The nowadays European educational framework boosts applying the learned theoretical concepts to real situations. Hence, practice sessions are key resources to present students direct applications of the theoretical concepts ... -
Geothermal thermoelectric generator for Timanfaya National Park
Catalán Ros, Leyre ; Astrain Ulibarrena, David ; Aranguren Garacochea, Patricia ; Araiz Vega, Miguel (2019)
Contribución a congreso / Biltzarrerako ekarpena
Despite being one of the largest renewable sources, geothermal energy is not widely utilized for electricity generation. In the case of shallow Hot Dry Rock (HDR) fields, thermoelectric generators can entail a sustainable ... -
Heat pipes thermal performance for a reversible thermoelectric cooler-heat pump for a nZEB
Aranguren Garacochea, Patricia ; Díaz de Garayo, Sergio; Martínez Echeverri, Álvaro ; Araiz Vega, Miguel ; Astrain Ulibarrena, David (Elsevier, 2019)
Artículo / Artikulua
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 ... -
Impact of a thermoelectric subcooler heat exchanger on a carbon dioxide transcritical refrigeration facility
Casi Satrústegui, Álvaro ; Aranguren Garacochea, Patricia ; Araiz Vega, Miguel ; Alegría Cía, Patricia; Astrain Ulibarrena, David (Elsevier, 2022)
Artículo / Artikulua
To improve the performance of vapour compression refrigeration cycles, the inclusion of a thermoelectric subcooler for low-medium power units has been the focus of recent studies due to its robustness, compactness and ... -
The importance of the assembly in thermoelectric generators
Araiz Vega, Miguel ; Catalán Ros, Leyre ; Herrero Mola, Óscar ; Pérez Artieda, Miren Gurutze ; Rodríguez García, Antonio (IntechOpen, 2018)
Capítulo de libro / Liburuen kapitulua
Generally, in the optimization of thermoelectric generators, only the heat exchangers or the thermoelectric modules themselves are taken into account. However, the assembly of the generator as a whole is of vital importance ... -
Improvements in the cooling capacity and the COP of a transcritical CO 2 refrigeration plant operating with a thermoelectric subcooling system
Astrain Ulibarrena, David ; Merino Vicente, Amaya ; Catalán Ros, Leyre ; Aranguren Garacochea, Patricia ; Araiz Vega, Miguel ; Sánchez, Daniel; Cabello, Ramón; Llopis, R. (Elsevier, 2019)
Artículo / Artikulua
Restrictive environmental regulations are driving the use of CO 2 as working fluid in commercial vapour compression plants due to its ultra-low global warming potential (GWP 100 = 1) and its natural condition. However, at ... -
Investigation of direct contact membrane distillation coupling with a concentrated photovoltaic solar system
Krnac, Andrew; Araiz Vega, Miguel ; Rana, Sohel; Velardo, Jason; Date, Abhijit (Elsevier, 2019)
Contribución a congreso / Biltzarrerako ekarpena
The scarcity of fresh water amongst a growing population is an impending global issue, which must be addressed by utilizing renewable energy sources. A Concentrated Photovoltaic (CPV) and Direct Contact Membrane Distillation ... -
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 (2018)
Tesis doctoral / Doktoretza tesia
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 ... -
New opportunities for electricity generation in shallow hot dry rock fields: a study of thermoelectric generators with different heat exchangers
Catalán Ros, Leyre ; Aranguren Garacochea, Patricia ; Araiz Vega, Miguel ; Pérez Artieda, Miren Gurutze ; Astrain Ulibarrena, David (Elsevier, 2019)
Artículo / Artikulua
Despite being one of the largest renewable sources, geothermal energy is not widely utilized for electricity generation. In order to leverage shallow hot dry rock (HDR) fields, the present paper proposes an alternative to ... -
Performance assessment of an experimental CO2 transcritical refrigeration plant working with a thermoelectric subcooler in combination with an internal heat exchanger
Casi Satrústegui, Álvaro ; Aranguren Garacochea, Patricia ; Araiz Vega, Miguel ; Sánchez, Daniel; Cabello, Ramón; Astrain Ulibarrena, David (Elsevier, 2022)
Artículo / Artikulua
Regulations in the refrigeration sector are forcing the transition to low global warming potential fluids such as carbon dioxide in order to decrease direct greenhouse gases emissions. Several technologies have arisen over ... -
Prospects of autonomous volcanic monitoring stations: experimental investigation on thermoelectric generation from fumaroles
Catalán Ros, Leyre ; Araiz Vega, Miguel ; Padilla, Germán D.; Hernández, Pedro A.; Pérez, Nemesio M.; García de la Noceda, Celestino; Albert, José F.; Astrain Ulibarrena, David (MDPI, 2020)
Artículo / Artikulua
Fumaroles represent evidence of volcanic activity, emitting steam and volcanic gases at temperatures between 70 and 100 °C. Due to the well-known advantages of thermoelectricity, such as reliability, reduced maintenance ...
