Listar EMC_Articles por autoría "574d1aed-8572-4790-9b24-23b5d3157c12"
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Mechanical reliability analysis of nanoencapsulated phase change materials combining Monte Carlo technique and the finite element method
Forner Escrig, Josep; Mondragon, Rosa; Hernandez, Leonor; Palma Guerrero, Roberto Elsevier (2021-07)Nanoencapsulated phase change materials (nePCMs) are one of the technologies currently under research for energy storage purposes. These nePCMs are composed of a phase change core surrounded by a shell which confines the ... -
Microstructure and mechanical properties of grains of silica nanofluids dried in an acoustic levitator
Mondragon, Rosa; Juliá Bolívar, José Enrique; Barba-Juan, Antonio; Jarque Fonfría, Juan Carlos Elsevier (2012)The microstructure and mechanical properties of spray-dried grains are key factors in many applications. In this work single droplets of silica nanofluids were dried in an acoustic levitator under different experimental ... -
Modeling of Drying Curves of Silica Nanofluid Droplets Dried in an Acoustic Levitator Using the Reaction Engineering Approach (REA) Model
Mondragon, Rosa; Juliá Bolívar, José Enrique; Hernandez, Leonor; Jarque Fonfría, Juan Carlos Taylor & Francis (2013)The use of nanoparticles has become of great interest in different industrial applications. The spray drying of nanofluids forms nanostructured grains, preserving the nanoparticle properties. In this work, individual ... -
New coloured coatings to enhance silica sand absorbance for direct particle solar receiver applications
Gimeno Furió, Alexandra; Hernandez, Leonor; Martinez Cuenca, Raul; Mondragon, Rosa; VELA GASULLA, ANTONIO FABIAN; Cabedo, Luis; Barreneche, Camila; Iacob, Mihail Elsevier (2020-06-30)New systems using solid particles for solar energy capturing, heat transfer and thermal energy storage have been proposed and analysed in direct particle solar receivers. In this work, black coloured silica sand was ... -
Non-isothermal modeling of drying kinetics of ceramic tiles
Jarque Fonfría, Juan Carlos; Segarra Ferrando, Carmen; Cantavella Soler, Vicente; Mondragon, Rosa Taylor & Francis (2016)The present study has been undertaken to optimize the drying stage in ceramic tile manufacture. Tests were conducted to determine drying kinetics, establishing how air temperature and relative humidity influenced this ... -
Non-linear finite element modelling of light-to-heat energy conversion applied to solar nanofluids
Forner Escrig, Josep; Mondragon, Rosa; Hernandez, Leonor; Palma Guerrero, Roberto Elsevier (2020-07-19)Nanoparticles (NPs) exhibit remarkable photothermal conversion efficiency under optical illumination. This light-induced heating on NPs is interesting in many different applications, such as solar radiation absorption in ... -
Numerical analysis of performance uncertainty of heat exchangers operated with nanofluids
Kamenik, B.; Begum Elcioglu, E.; Turgut, A.; Mondragon, Rosa; Hernandez, Leonor; Vallejo, Javier P.; Lugo, Luis; Buschmann, Matthias; Ravnik, Jure Elsevier Ltd. (2022-03-07)In this paper, we analyse the performance of two types of heat exchangers with nanofluid as the working fluid in turbulent flow regime ( 4, 000–180, 000). Based on the experimental uncertainty of the thermophysical properties ... -
Numerical Modeling of the Mechanical Reliability of Multicoated Nanoencapsulated Phase-Change Materials with Improved Thermal Performance
Forner Escrig, Josep; Navarrete Argilés, Nuria; Palma Guerrero, Roberto; La Zara, Damiano; Goulas, Aristeidis; Valdesueiro, David; van Ommen, J. Ruud; Hernandez, Leonor; Mondragon, Rosa Wiley (2021-12-21)Nanoencapsulated phase-change materials (nePCMs) are investigated for enhancing thermal energy storage. However, the shell of these nanocapsules may fail due to stress developed during thermal processes, leading to melting ... -
On the relationship between the specific heat enhancement of salt-based nanofluids and the ionic exchange capacity of nanoparticles
Mondragon, Rosa; Juliá Bolívar, José Enrique; Cabedo, Luis; Navarrete Argilés, Nuria Nature Publishing Group (2018)Nanoparticles have been used in thermal applications to increase the specific heat of the molten salts used in Concentrated Solar Power plants for thermal energy storage. Although several mechanisms for abnormal enhancement ... -
Optical characterisation and photothermal conversion efficiency of a water-based carbon nanofluid for direct solar absorption applications.
Gimeno Furió, Alexandra; Martinez Cuenca, Raul; Mondragon, Rosa; VELA GASULLA, ANTONIO FABIAN; Doñate-Buendía, Carlos; Mínguez-Vega, Gladys; Hernandez, Leonor Elsevier (2020-12-01)Carbon nanoparticles are very useful in solar thermal applications as they absorb much of the solar spectrum and can be inexpensive. Water-based carbon nanofluids with two different concentrations (3 and 33 mg l−1) were ... -
Photothermal properties and performance of hybrid carbon-paraffin/water emulsions
Burgos Rodríguez, Jorge; Mondragon, Rosa; Martinez Cuenca, Raul; Udayashankar, Nithiyanantham; Barison, Simona; mancin, simone; Fabregat-Santiago, Francisco; Hernandez, Leonor Elsevier (2023-10-09)Solar thermal energy has attracted renewed research interest for its excellent energy efficiency among different types of solar technologies. However, the limiting factor of them all is the intermittent nature of solar ... -
El proceso de secado por atomización: formación de gránulos y cinética de secado de gotas
Mondragon, Rosa; Juliá Bolívar, José Enrique; Barba-Juan, Antonio; Jarque Fonfría, Juan Carlos Sociedad Española de Cerámica y Vídrio (2013-07)Spray drying is a unit operation very common in many industrial processes. For each particular application, the resulting granulated material must possess determined properties that depend on the conditions in which the ... -
Single droplet drying of detergents: Experimentation and modelling
Hernández, Borja; Mondragon, Rosa; Pinto, Mark A.; Hernandez, Leonor; Juliá Bolívar, José Enrique; Jarque Fonfría, Juan Carlos; chiva, sergio; Martin, Mariano Elsevier (2021-03-03)This study evaluates the single droplet drying (SDD) of detergents. Experimental data are used to validate a theoretical multistage model. The experiments are carried out in an acoustic levitator analysing six different ... -
Stabilization and characterization of a nanofluid based on a eutectic mixture of diphenyl and diphenyl oxide and carbon nanoparticles under high temperature conditions
Gimeno Furió, Alexandra; Navarrete Argilés, Nuria; Mondragon, Rosa; Hernandez, Leonor; Martinez Cuenca, Raul; Cabedo, Luis; Juliá Bolívar, José Enrique Elsevier (2017-06)(C12H10O), and it is used as an HTF with a maximum working temperature of 400 °C. However, one of the drawbacks of Therminol VP1 is its low thermal conductivity. In recent years it has been demonstrated that the addition ... -
Study of the drying behavior of high load multiphase droplets in an acoustic levitator at high temperature conditions
Mondragon, Rosa; Hernandez, Leonor; Juliá Bolívar, José Enrique; Jarque Fonfría, Juan Carlos; chiva, sergio; Zaitone, Belal; Tropea, Cameron Elsevier (2011-06-15)Experimental data on the drying behavior of suspension droplets is limited, despite its importance in industrial applications for material processing, chemical or the food industry involving spray dryers. This fact is ... -
Synthesis and characterization of gold/water nanofluids suitable for thermal applications produced by femtosecond laser radiation
Mondragon, Rosa; Torres-Mendieta, Rafael; Meucci, Marco; Mínguez-Vega, Gladys; Juliá Bolívar, José Enrique; Sani, Elisa Society of Photo-optical Instrumentation Engineers (SPIE) (2016-07)A laser-based “green” synthesis of nanoparticles (NPs) was used to manufacture gold NPs in water. The light source is a Ti:Sapphire laser with 30 fs FWHM pulses, 800 nm mean wavelength, and 1 kHz repetition rate. The ... -
The contact angle of nanofluids as thermophysical property
Hernaiz, M.; Alonso, V.; estellé, patrice; Wu, Z.; Sundén, B.; Doretti, L.; mancin, simone; Çobanoğlu, Nur; Karadeniz, Ziya Haktan; Garmendia, N.; Lasheras-Zubiate, L.; Hernandez, Leonor; Mondragon, Rosa; Martinez Cuenca, Raul; Barison, Simona; Kujawska, A.; Turgut, A.; Amigo, A.; HUMINIC, Gabriela; Huminic, Angel; Kalus, M.-R.; Schroth, K.-G.; Buschmann, Matthias Elsevier (2019-07-01)Droplet volume and temperature affect contact angle significantly. Phase change heat transfer processes of nanofluids – suspensions containing nanometre-sized particles – can only be modelled properly by understanding these ... -
Thermal energy storage of molten salt ebased nanofluid containing nano-encapsulated metal alloy phase change materials
Navarrete Argilés, Nuria; Mondragon, Rosa; Wen, Dongsheng; Navarro, María Elena; Ding, Yulong; Juliá Bolívar, José Enrique Elsevier (2019-01-15)The availability of Thermal Energy Storage systems in Concentrated Solar Power plants makes them suitable to handle the gap between energy supply and power demand. Increasing the total thermal energy storage capacity of ... -
Tribological Analysis and Operation Issues of SiO2 Nanolubricants for MQL Machining Operations
Mondragon, Rosa; Abellán-Nebot, José V.; Habib Ameen, Kudama; Serrano Mira, Julio Trans Tech Publications (2023-10)Minimum Quantity Lubrication (MQL) has been proved to be an efficient lubricant technique in machining that increases tool life, improves surface roughness, facilitates the recycling of the resulting chips, brings more ... -
Water temperature effect on upward air-water flow in a vertical pipe: Local measurements database using four-sensor conductivity probes and LDA
Monrós Andreu, Guillem; chiva, sergio; Martinez Cuenca, Raul; Torró Cueco, Salvador Francisco; Juliá Bolívar, José Enrique; Hernandez, Leonor; Mondragon, Rosa E D P SCIENCES (2013)Experimental work was carried out to study the effects of temperature variation in bubbly, bubbly to slug transition. Experiments were carried out in an upward air-water flow configuration. Four sensor conductivity probes ...