Browsing by Subject "Termodinàmica"

Now showing items 1-20 of 208

    • A comparative molecular dynamics study of sulfuric and methanesulfonic acids 

      Canales Gabriel, Manel; Guàrdia Manuel, Elvira (2016-12-01)
      Article
      Open Access
      The molecular dynamics computer simulation method has been used to study sulfuric and methanesulfonic acids. Calculations have been carried out between 200 K and 400 K using reliable force fields. Thermodynamic properties, ...

    • A consistent methodology to characterize BAW resonators 

      Rocas Cantenys, Eduard; Collado Gómez, Juan Carlos; Aigner, Robert; Mateu Mateu, Jordi; Hueltes Escobar, Alberto; Booth, James C. (2012)
      Conference report
      Restricted access - publisher's policy
      We present a methodology to characterize BAW resonators both linearly and nonlinearly. The procedure uses physical modeling along with measurements that exploit different manifestations of the nonlinear phenomena to ...

    • A new shoreline instability mechanism related to high-angle waves 

      Kakeh Burgada, Nabil; Falqués Serra, Albert; Calvete Manrique, Daniel (2017)
      Conference lecture
      Open Access
      The alongshore wave driven sediment transport can render a rectilinear coastline unstable in case of very oblique wave incidence.

    • A suitable criterion for tube sizing in reverse cycle machines 

      Rivero Vilà, Oriol del (Universitat Politècnica de Catalunya / Université de Lorraine, 2011)
      Master thesis (pre-Bologna period)
      Open Access
      To find the optimal diameters for the connecting tubes in reverse cycle machines we use in this paper a new criterion that we have recently developed, the Ecological Cost, “EC" (Kheiri et al. 2011) EC includes the environmental ...

    • Activity driven modeling of time varying networks 

      Perra, N.; Gonçalves, B.; Pastor Satorras, Romualdo; Vespignani, Alessandro (2012-06-25)
      Article
      Restricted access - publisher's policy
      Network modeling plays a critical role in identifying statistical regularities and structural principles common to many systems. The large majority of recent modeling approaches are connectivity driven. The structural ...

    • Actuator behaviour of tailored poly(Thiourethane) shape memory thermosets 

      Gamardella, Francesco; Serra Albet, Maria Àngels; Ramis Juan, Xavier; Flor López, Sílvia de la (Multidisciplinary Digital Publishing Institute (MDPI), 2021-05-01)
      Article
      Open Access
      n this work, a new family of poly(thiourethane) shape memory thermosetting actuators was developed and characterized. These materials can be easily prepared from mixtures of two different aliphatic diisocyanates and a ...

    • Advanced study for the numerical resolution of the Navier-Stokes equations. Application to thermal energy storage systems 

      Sanmartí Perona, Oriol (Universitat Politècnica de Catalunya, 2022-07-19)
      Master thesis
      Open Access
      The resolution of the Navier Stokes equations in three dimensions in a turbulent regime applying turbulence models is studied. To accomplish this objective, it is done a brief introduction to the work done on the Final ...

    • An innovative natural air-cooling system technique for temperature-rise suppression on the permanent magnet synchronous machines 

      Asef, Pedram; Bargalló Perpiñá, Ramón; Barzegaran, M.R. (2018-01)
      Article
      Open Access

    • An integrated view of theiInfluence of temperature, pressure, and humidity on the stability of trimorphic cysteamine hydrochloride 

      Gana, Inès; Barrio Casado, María del; Ghaddar, Carine; Nicolai, Beatrice; Do, Bernard; Tamarit Mur, José Luis; Safta, Fathi; Rietveld, Ivo B. (2015-07-01)
      Article
      Open Access
      Understanding the phase behavior of pharmaceuticals is important for dosage form development and regulatory requirements, in particular after the incident with ritonavir. In the present paper, a comprehensive study of the ...

    • An introduction to parallel in time discretization of transport equations 

      Coronel Varillas, Solange (Universitat Politècnica de Catalunya, 2021-07)
      Master thesis
      Restricted access - confidentiality agreement
      Covenantee:   Barcelona Supercomputing Center
      Parallel in time integration methods is an interesting field of study, because of its new direction over parallelize. That is, when parallelization in space becomes saturated, the time direction becomes a new way in which ...

    • An OpenFOAM set-up for simulating thermal winds in mountain/valley configurations 

      Athota, Rathan Babu; Rojas Gregorio, José Ignacio; Arias Calderón, Santiago; Villardi de Montlaur, Adeline de (2021)
      Conference report
      Open Access

    • Analisis termodinamico de los ciclos de rankine 

      Fuste Paredes, Sergi (Universitat Politècnica de Catalunya, 2015-04)
      Bachelor thesis
      Open Access

    • Analysis of a set of modi cation proposals of Ascó's Nuclear Power Plant Cooling Towers 

      González Escudero, Francisco de Borja (Universitat Politècnica de Catalunya, 2014-02)
      Master thesis
      Restricted access - author's decision
      The electrical production of a Nuclear Power Plant depends on the performance of the Circulating Water System, which works removes the residual heat of the plant according to regulations. Owing to the old age of Ascó's ...

    • Analysis of heat transfer and fluid flow in thermal equipment 

      Zhang, Lei (Universitat Politècnica de Catalunya, 2019-10-09)
      Master thesis
      Open Access
      Heat transfer and flow fluid in thermal equipment is a concerned and basic topic in thermal area. The main objective of this thesis is tocultivate basic skills of analyzing athermal problemand selecting an appropriate ...

    • Anàlisi termodinàmica de cicles criogènics per a la producció d'hidrogen líquid. 

      Janer Cifre, Cristòfol (Universitat Politècnica de Catalunya, 2021-11-01)
      Bachelor thesis
      Open Access
      La demanda energètica a escala mundial no ha deixat de créixer en els darrers anys, i les previsions científiques indiquen que així ho seguirà fent. Els combustibles fòssils com el carbó, el petroli o el gas natural, tot ...

    • Anàlisi termomecànica d'una pinça de fre en servei 

      Vázquez Romero, Adrián (Universitat Politècnica de Catalunya, 2021-10-19)
      Bachelor thesis
      Restricted access - author's decision
      L’objectiu d’aquest treball és analitzar el comportament d’una pinça de fre en servei, tenint en compte les càrregues mecàniques i tèrmiques. Per assolir aquest objectiu, es realitzen una sèrie de simulacions tèrmiques, ...

    • Anàlisis d’una incineradora de RSU amb aprofitament de l'energia generada 

      Martí Tubert, Marcel (Universitat Politècnica de Catalunya, 2015-01)
      Bachelor thesis
      Open Access
      Històricament desfer-se de les deixalles sempre havia resultat un problema. Usualment s’utilitzaven els abocadors o s’enterraven sota terra però en ambdós casos la seva afectació tant per la natura com per la població no ...

    • Análisis exergético de bienes de equipo 

      Orellana Abreu, Andrea (Universitat Politècnica de Catalunya, 2009-09)
      Master thesis (pre-Bologna period)
      Open Access
      El análisis exergético es una metodología que permite analizar los mecanismos básicos de la eficiencia exergética de cualquier sistema, mediante la aplicación de las leyes de la termodinámica. Por ello, es considerada ...

    • Asacción 2019 

      Vima Grau, Sara (2020-02-18)
      Internal report
      Open Access

    • Asymptotic analysis of the Gunn effect with realistic boundary conditions 

      Bonilla, L. L.; Rodríguez Cantalapiedra, Inma; Gomila Lluch, Gabriel; Rubí Capaceti, José Miguel (The American Physical Society, 1997-08-31)
      Article
      Open Access
      A general asymptotic analysis of the Gunn effect in n-type GaAs under general boundary conditions for metal-semiconductor contacts is presented. Depending on the parameter values in the boundary condition of the injecting ...