196,357 research outputs found
CAJA 157 - LEGAJO III - SIGNATURA 05
No full textFederico Montagud Díaz remite a la Sociedad el "Tratado de Urbanidad" que es la traducción de la obra italina "Nuevo Galateo un altra volta purgato", publicadas por Francisco Lonchena, que a su vez se limitó a reformar la obra de Melchor Gioja. Informe de la Comisión de Educación sobre este asunto.Giola, M.; Lonchena, F.; Montagud Díaz, F. (1863). Federico Montagud Díaz remite a la Sociedad el "Tratado de Urbanidad" que es la traducción de la obra italina "Nuevo Galateo un altra volta purgato", publicadas por Francisco Lonchena, que a su vez se limitó a reformar la obra de Melchor Gioja. Informe de. Real Sociedad Económica de Amigos del País de Valencia. https://riunet.upv.es/handle/10251/23074Importación Masiv
Implementation and Evaluation of an M/S Scheme for Inter-Destination Multimedia Synchronization (IDMS)
No full text[EN] Nowadays, the media consumption model is changing from passive isolated activities
towards dynamic group shared experiences. People separated in space can already interact
and collaborate within the context of simultaneous media content delivery (e.g. they can
launch a real time conversation during a shared video watching). However, to stimulate the
acceptance and usability of those socially aware interactive media services, synchronous
communications (i.e. consistent playout states) across separated locations must be guaranteed.
Inter-Destination Multimedia Synchronization (IDMS) has become a key research topic to
enable geographically dispersed consumers to experience a satisfying feeling of togetherness.
Several (distributed and centralized) approaches to perform IDMS have been adopted by the
research community up to date. In this paper, a Master/Slave (M/S) Control Scheme for
IDMS is implemented and tested, thus analyzing its strengths and weaknesses for distributed
networked environments. Simulation results prove the effectiveness and suitability of the
proposed M/S Scheme in those scenarios in which scalability, consistency, interactivity and
low control traffic overhead features must be provided.This work has been financed, partially, by Universitat Politècnica de Valencia (UPV), under its R&D Support Program in PAID-05-11-002-331 Project and in PAID-01-10.Montagud, M.; Boronat Segui, F. (2011). Implementation and Evaluation of an M/S Scheme for Inter-Destination Multimedia Synchronization (IDMS). Network Protocols and Algorithms. 3(3):80-98. https://doi.org/10.5296/npa.v3i3.1089S80983
Gollumjapyx smeagol gen. n., sp. n., an enigmatic hypogean japygid (Diplura: Japygidae) from the eastern Iberian Peninsula
No full textSendra, Alberto, Ortuño, Vicente M., Moreno, Agustín, Montagud, Sergio, Teruel, Santiago (2006): Gollumjapyx smeagol gen. n., sp. n., an enigmatic hypogean japygid (Diplura: Japygidae) from the eastern Iberian Peninsula. Zootaxa 1372: 35-52, DOI: 10.5281/zenodo.17494
Toward Interactive and Distributed Hybrid Extended Reality Experiences
No full textHybrid Extended reAliTy (HEAT) is a project born to pave the way for the next-generation distributed experiences: being realistically immersed (holo-ported) within real captured omni-directional and navigable hyper-realistic 3D spaces, feeling their atmosphere, and sharing these experiences with others, regardless of their location. This paper gives an overview on how HEAT aims at integrating immersive media technologies such as point cloud/holographic imaging, multi-sensorial media, Social VR in a multi-user, feedback- enabled communication system to provide the construction of compelling context-aware and embodied experiences for innovative hybrid XR applications
Las técnicas de dorado y plateado de superficies con láminas metálicas
No full textCarabal-Montagud, M.; Santamarina-Campos, V.; Esgueva López, MV. (2020). Las técnicas de dorado y plateado de superficies con láminas metálicas. 175-176. https://riunet.upv.es/handle/10251/177534S17517
Upgrade of the B2G dynamic geothermal heat exchanger model: Optimal location of the ground nodes
No full textIn order to optimize the design and operation of a ground source heat pump system, the modeling of the Borehole Heat Exchanger (BHE) and its coupling
to the heat pump operation becomes crucial. This becomes key for those systems with on/off operation, where it is important to model the short-term response
of the BHE accurately. Furthermore, the modeling of the local variation of the ground temperature near the BHE will be highly influenced by ground
thermal properties and the operation of the system. In this context, the novel B2G dynamic model was developed and experimentally validated in previous
works for a single U BHE and adapted to a novel coaxial spiral configuration. In order to consider the influence of the soil surrounding the BHE, two
ground nodes were initially defined and their position (penetration radii) was calculated for a specific type of soil and operating conditions. This paper
presents an upgrade of the B2G model, with a descripton of penetration radii calculation. For this purpose, a comparison between the B2G model and the
Infinite Cylindrical Source model was carried out to find the penetration radii that reproduce the ground thermal response with a higher accuracy under the
corresponding soil thermal properties and operating conditions.The present work has been supported by the European Community Horizon 2020 Program for European
Research and Technological Development (2014-2020) inside the framework of the project 656889 – GEOTeCH
(Geothermal Technology for Economic Cooling and Heating) and by the Generalitat Valenciana inside the program
“Ayudas para la contratación de personal investigador en formación de carácter predoctoral (ACIF/2016/131)”Cazorla-Marín, A.; Montagud- Montalvá, C.; Corberán, JM.; Tinti, F.; Focaccia, S. (2018). Upgrade of the B2G dynamic geothermal heat exchanger model: optimal location of the ground nodes. International Ground Source Heat Pump Association. 20-28. https://doi.org/10.22488/okstate.18.000013S202
Experimental validation of a short-term Borehole-to-Ground (B2G) dynamic model
No full textThe design and optimization of ground source heat pump systems require the ability to accurately reproduce the dynamic thermal behavior of the system on a short-term basis, specially in a system control perspective. In this context, modeling borehole heat exchangers (BHEs) is one of the most relevant and difficult tasks. Developing a model that is able to accurately reproduce the instantaneous response of a BHE while keeping a good agreement on a long-term basis is not straightforward. Thus, decoupling the short-term and long-term behavior will ease the design of a fast short-term focused model. This work presents a short-term BHE dynamic model, called Borehole-to-Ground (B2G), which is based on the thermal network approach, combined with a vertical discretization of the borehole.The proposed model has been validated against experimental data from a real borehole located in Stockholm, Sweden. Validation results prove the ability of the model to reproduce the short-term behavior of the borehole with an accurate prediction of the outlet fluid temperature, as well as the internal temperature profile along the U-tube
On the power profiles of contact lenses measured with NIMO TR1504
No full textThis study was supported by the Ministerio de Economía y Competitividad and FEDER (Grant DPI2015-71256-R) and by the Generalitat Valenciana (Grant PROMETEOII-2014-072), Spain.Rodríguez-Vallejo, M.; Montagud-Martínez, D.; Monsoriu Serra, JA.; Furlan, WD. (2017). On the power profiles of contact lenses measured with NIMO TR1504. Journal of Optometry. 10(4):265-266. https://doi.org/10.1016/j.optom.2016.10.002S26526610
Borehole modelling: a comparison between a steady-state model and a novel dynamic model in a real ON/OFF GSHP operation
No full textThe correct design and optimization of complex energy systems requires the ability to reproduce the dynamic thermal behavior of each system component. In ground source heat pump (GSHP) systems, modelling the borehole heat exchangers (BHE) dynamic response is especially relevant in the development of control strategies for energy optimization purposes. Over the last years, several models have been developed but most of them are based on steady state approaches, which makes them unsuitable for short-term simulation purposes. In fact, in order to accurately predict the evolution of the fluid temperatures due to the ON/OFF cycles of the heat pump, it is essential to correctly characterize the dynamic response of BHE for very short time periods. The aim of the present paper is to compare the performance of an analytical steady-state model, available in TRNSYS environment (Type 557), with a novel short-term dynamic model. The new dynamic model is based on the thermal-network approach coupled with a vertical discretization of the borehole which takes into account both
the advection due to the fluid circulating along the U-tube, and the heat transfer in the borehole
and in the ground. These two approaches were compared against experimental data collected from a real GSHP system installed at the Universitat Polit ècnica de Val ència. The analysis was performed comparing the outlet temperature profiles predicted by both models during daily standard ON/OFF operating conditions, both in heating and cooling mode, and the between both approaches were highlighted. Finally, the obtained results have been discussed focusing on the potential impact that the differences found in the prediction of the temperature evolution could have in design and optimization of GSHP systems.De Rosa, M.; Ruiz Calvo, F.; Corberán Salvador, JM.; Montagud Montalvá, CI.; Tagliafico, L. (2014). Borehole modelling: a comparison between a steady-state model and a novel dynamic model in a real ON/OFF GSHP operation. Journal of Physics: Conference Series. 547:1-10. doi:10.1088/1742-6596/547/1/012008S11054
A novel TRNSYS type of a coaxial borehole heat exchanger for both short and mid term simulations: B2G model
No full text[EN] A dynamic model of a ground source heat pump system is a very useful tool in order to optimize its design and operation. In order to fairly predict the performance of such a system, the dynamic evolution of the fluid entering the heat pump and coming from the borehole heat exchanger (BHE) must be accurately reproduced not only in the long term but also in the short-mid term operating conditions, as it directly affects the coefficient of performance of the heat pump unit.
In this context, the B2G model was developed to reproduce the short-term dynamic evolution of the fluid temperature inside the BHE. This work presents the new upgraded version of the B2G dynamic model for a coaxial BHE, which includes several new features to better reproduce not only the short-term but also the mid-term behaviour of the BHE. For that purpose, the model of the surrounding ground has been improved: vertical heat conduction in the grout and ground, heterogenous ground with different layers, and a higher number of ground nodes in the thermal network considered in the model were added, which are automatically located by means of polynomial correlations for any type of ground, geometry and operating conditions. This novel approach has been implemented in TRNSYS for accurately modelling the dynamic behaviour of a coaxial BHE with low computational cost (2.5¿s for a 24¿h simulation period in a modern computer).
The model has been validated against experimental data from a dual source heat pump installation in Tribano (Padua, Italy) and has proven capable of accurately reproducing the short-mid term (up to five days) behaviour of the BHE, with a deviation lower than 0.12¿K.The present work has been supported by the European Community Horizon 2020 Program for European Research and Technological Development (2014-2020) inside the framework of the project 656889 –GEOTeCH (Geothermal Technology for Economic Cooling and Heating) and by the Generalitat Valenciana inside the program “Ayudas para la contratación de personal investigador en formación de carácter predoctoral (ACIF/2016/131)”.Cazorla-Marín, A.; Montagud- Montalvá, C.; Tinti, F.; Corberán, JM. (2019). A novel TRNSYS type of a coaxial borehole heat exchanger for both short and mid term simulations: B2G model. Applied Thermal Engineering. 164(114500):1-15. https://doi.org/10.1016/j.applthermaleng.2019.114500S11516411450
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