Now showing items 471-490 of 725

    • Natural convection from narrow horizontal plates at moderate Rayleigh numbers 

      Martorell, Ingrid; Herrero, Joan; Grau, Francesc X. (Elsevier, 2003)
      The present work deals with the natural convection flow and heat transfer from a horizontal plate cooled from above.Experiments are carried out for rectangular plates having aspect ratios between / ¼ 0:036 and 0.43 and ...
    • Natural convection heat transfer coefficients in phase change material (PCM) modules with external vertical fins 

      Castell, Albert; Solé Cutrona, Cristian; Medrano Martorell, Marc; Roca Enrich, Joan; Cabeza, Luisa F.; García, Daniel (Elsevier, 2008)
      To determine the heat transfer coefficient by natural convection for specific geometries, experimental correlations are used. No correlations were found in the literature for the geometries studied in this work. These ...
    • New database on phase change materials for thermal energy storage in buildings to help PCM selection 

      Cabeza, Luisa F.; Serrano, Susana; Fernández Renna, Ana Inés; Navarro Rivero, Helena; Barreneche Güerisoli, Camila (Elsevier, 2014)
      According to the International Energy Agency (IEA) the primary energy production was increased by 49% and CO2 emissions by 43% over the past 20 years. Furthermore, 30 - 40% of total energy consumption in developed countries ...
    • New database to select phase change materials: chemical nature, properties, and applications 

      Barreneche Güerisoli, Camila; Navarro, Maria E.; Cabeza, Luisa F.; Fernández Renna, Ana Inés (Elsevier, 2015)
      Today, thermal energy storage materials are proposed as a promising solution to increase the energy efficiency in building sector and to reduce the total energy demand because building sector accounts up to 34% of total ...
    • New equipment for testing steady and transient thermal performance of multilayered building envelopes with PCM 

      Gracia Cuesta, Alvaro de; Barreneche Güerisoli, Camila; Farid, Mohammed M.; Cabeza, Luisa F. (Elsevier, 2011)
      Thermal properties of the different building envelopes, such as thermal transmittance in steady state, heat storage capacity and dynamic thermal responses, must be taken into account during the design phase of buildings. ...
    • New formulation and characterization of enhanced bulk-organic phase change materials 

      Palacios, Anabel; Gracia Cuesta, Alvaro de; Cabeza, Luisa F.; Julià Bolivar, José Enrique; Fernández Renna, Ana Inés; Barreneche Güerisoli, Camila (Elsevier, 2018)
      The main drawbacks faced by researchers to successfully implement organic-PCM as materials to improve the thermal performance of building systems are their low thermal conductivity, their high flammability, and their low ...
    • New green facades as passive systems for energy savings on buildings 

      Coma Arpón, Julià; Pérez Luque, Gabriel; Solé Cutrona, Cristian; Castell, Albert; Cabeza, Luisa F. (Elsevier, 2014)
      The new technologies of plants integration on buildings offer new possibilities from the sustainable construction point of view, especially in energy savings. In previous studies the great capacity of double-skin green ...
    • New Inference Rules for Max-SAT 

      Li, Chu-Min; Manyà Serres, Felip; Planes Cid, Jordi (Association for the Advancement of Artificial Intelligence, 2007)
      Exact Max-SAT solvers, compared with SAT solvers, apply little inference at each node of the proof tree. Commonly used SAT inference rules like unit propagation produce a simplified formula that preserves satisfiability ...
    • Novel inorganic binary mixture for low‐temperature heat storage applications 

      Galazutdinova, Yana; Grágeda, Mario; Cabeza, Luisa F.; Ushak, Svetlana (Wiley, 2017)
      In this study, an inorganic mixture based on bischofite (industrial by‐product) was developed and characterized for its application as a phase change material for low‐temperature thermal energy storage. The most appropriate ...
    • Numerical analysis of a latent heat thermal energy storage system under partial load operating conditions 

      Arena, Simone; Casti, Efisio; Gasia, Jaume; Cabeza, Luisa F.; Cau, Giorgio (Elsevier, 2018)
      One of the features that should be considered when designing a thermal energy storage (TES) system is its behaviour when subjected to non-continuous (partial loads) operating conditions. Indeed, the system performance can ...
    • Numerical analysis of building envelope with movable phase change materials for heating applications 

      Gracia Cuesta, Alvaro de (MDPI, 2019)
      Latent heat storage materials have been tested by several researchers for decades to be used as passive heating and cooling systems in buildings but their implementation into building components is still stacked as is ...
    • Numerical model evaluation of a PCM cold storage tank and uncertainty analysis of the parameters 

      Zsembinszki, Gabriel; Moreno Argilés, Pere; Solé Cutrona, Cristian; Castell, Albert; Cabeza, Luisa F. (Elsevier, 2014)
      Thermal energy storage (TES) tanks for cold storage can be used for peak load shaving. This paper presents and evaluates a mathematical model where a TES tank is filled with commercial phase change material (PCM) flat ...
    • Numerical modelling o f ventilated facades: A review 

      Gracia Cuesta, Alvaro de; Castell, Albert; Navarro Farré, Lidia; Oró Prim, Eduard; Cabeza, Luisa F. (Elsevier, 2013)
      The use of double skin facades (DSF) in the building sector and its thermal benefits have been widely studied numerically over the last 30 years. These modelling and simulations are based on different typologies, which ...
    • Numerical parametric study of a hotspot-targeted microfluidic cooling array for microelectronics 

      Laguna Benet, Gerard; Vilarrubí, Montse; Ibáñez, Manuel; Betancourt, Yina; Illa i Alibés, Josep; Azarkish, Hassan; Amnache, Amrid; Collin, Louis-Michel; Coudrain, Perceval; Fréchette, L. G.; Barrau, Jérôme (Elsevier, 2018-11-05)
      Thermal management in integrated chips is one of the major challenges on micro- and nanoelectronics. The rise of power density raised the need for microchannel liquid cooling solutions. This technology has poor temperature ...
    • Numerical simulation of a finned-tube LHTES system: influence of the mushy zone constant on the phase change behaviour 

      Arena, Simone; Casti, Efisio; Gasia, Jaume; Cabeza, Luisa F.; Cau, Giorgio (Elsevier, 2017)
      This work presents a numerical investigation on latent heat thermal energy storage (LHTES) systems during the phase change process. The numerical analysis, based on the apparent heat capacity formulation, was carried out ...
    • Numerical simulation of a PCM packed bed system: A review 

      Gracia Cuesta, Alvaro de; Cabeza, Luisa F. (Elsevier, 2016)
      The detailed study of latent packed bed thermal energy storage (TES) system has been a great topic of interest in the literature. Experimental measurements have been conducted to analyze the performance of these systems, ...
    • Numerical study of dynamic melting enhancement in a latent heat thermal energy storage system 

      Gasia, Jaume; Groulx, Dominic; Tay, N. H. Steven; Cabeza, Luisa F. (Elsevier, 2020)
      In the present work, a 2D Cartesian numerical model is implemented to simulate the transient behaviour of a latent heat thermal energy storage system under the effect of the dynamic melting enhancement technique. This ...
    • Numerical study on the thermal performance of a ventilated facade with PCM 

      Gracia Cuesta, Alvaro de; Navarro Farré, Lidia; Castell, Albert; Cabeza, Luisa F. (Elsevier, 2013)
      A new type of ventilated facade (VF) with macro-encapsulated phase change material (PCM) in its air cavity is presented in this paper. Two identical house-like cubicles located in Puigverd de Lleida (Spain) were monitored ...
    • Obtaining the three-dimensional structure of tree orchards from remote 2D terrestrial LIDAR scanning 

      Rosell Polo, Joan Ramon; Llorens Calveras, Jordi; Sanz Cortiella, Ricardo; Arnó Satorra, Jaume; Ribes Dasi, Manuel; Masip Vilalta, Joan; Escolà i Agustí, Alexandre; Camp, Ferran; Solanelles Batlle, Francesc; Gràcia, Felip; Gil Moya, Emilio; Val, Luis; Planas de Martí, Santiago; Palacín Roca, Jordi (Elsevier, 2009)
      In recent years, LIDAR (light detection and ranging) sensors have been widely used to measure environmental parameters such as the structural characteristics of trees, crops and forests. Knowledge of the structural ...
    • Obtención de Modelos 3D a partir de Proyecciones Axonométricas 

      Béjar Torres, Ramón; Cabiscol i Teixidó, Alba; Fernàndez Camon, César; López, M.; Manyà Serres, Felip (2002)
      En este artículo presentamos un método computacional para la resolución del problema de la interpretación de una escena 3D a partir de una proyección axonométrica de la misma. Si bien este problema había sido tratado ...