Browsing by Author "Torras Ortiz, Santiago"Més informacióMés informació

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    • A 0D approach fot extended operational modeling of air ejectors in thermal systems 

      Schillaci, Eugenio; Oliet Casasayas, Carles; Ablanque Mejía, Nicolás; Torras Ortiz, Santiago; Vemula, Jagadish Babu; Duponcheel, Matthieu; Bartosiewicz, Yann; Planquart, Philippe (Begell House, 2023)
      Conference report
      Restricted access - publisher's policy
      Classic ejector models work accurately only in normal operating conditions, i.e. when the primary flow is in supercritical conditions. Moreover, they do not take into account abnormal situations, such as when the primary ...

    • A multivariable control strategy based on fuzzy logic interference rule for a solar-driven, direct air-cooled H2O-LiBr absorption chiller 

      Castro González, Jesús; Farnós Baulenas, Joan; Papakokkinos, Giorgos; Zheng, Jian; Torras Ortiz, Santiago (Elsevier, 2024-05)
      Article
      Open Access
      The operation of a solar-driven H2O-LiBr Absorption Chiller (AbC) is subjected to various limitations regarding its ability to satisfy efficiently the required cooling demand while avoiding certain internal conditions, ...

    • Advanced analysis of thermal energy storage in CSP plants 

      Pérez Segarra, Carlos David; González Acedo, Ignacio; Torras Ortiz, Santiago; Rigola Serrano, Joaquim; Oliva Llena, Asensio (2016-11-24)
      Research report
      Open Access

    • Coupling of thermal and electrical systems for the simulation of ECS architectures 

      Ablanque Mejía, Nicolás; Gurumurthy, Sriram; Torras Ortiz, Santiago; Monti, Antonello; Rigola Serrano, Joaquim; Oliet Casasayas, Carles (Linköping University, 2023)
      Conference report
      Restricted access - publisher's policy
      This work is focused on the coupling of two complex models based on different underlying physics: a vapor compression refrigerating system and its electrical drive system. The main challenge was to correctly handle the ...

    • Detailed numerical model for the resolution of molten salt storage tanks for CSP plants 

      Pérez Segarra, Carlos David; Rodríguez Pérez, Ivette María; Oliva Llena, Asensio; Torras Ortiz, Santiago; Lehmkuhl Barba, Oriol (2012)
      Conference report
      Open Access
      Considering the state-of-the-art in TES technologies, two-tank indirect system using molten salt is the most widespread within CSP plants. However, current techniques for design and optimization, as well as, for assessing ...

    • DNS and RANS simulations of a coil heat exchanger immersed in a tank 

      Vera i Fernández, Jordi; Torras Ortiz, Santiago; Schillaci, Eugenio; Oliva Llena, Asensio (Begell House, 2023)
      Conference lecture
      Restricted access - publisher's policy
      The operation of heat exchangers in a thermal system can be described by simple heat transfer equations. The heat exchange is normally defined by a global heat transfer coefficient, which takes into account internal and ...

    • Drain water heat recovery storage-type unit for residential housing 

      Torras Ortiz, Santiago; Oliet Casasayas, Carles; Rigola Serrano, Joaquim; Oliva Llena, Asensio (2016-06-25)
      Article
      Open Access
      The drain water heat recovery (DWHR) system is an interesting household technology to reduce energy costs and environmental impact. The objective of the utilisation of these devices is the recovery of the waste heat from ...

    • Dynamic simulation of indirect air conditioning systems with optimized computational time 

      Ablanque Mejía, Nicolás; Torras Ortiz, Santiago; Oliet Casasayas, Carles; Rigola Serrano, Joaquim; Pérez Segarra, Carlos David (2019)
      Conference report
      Open Access

    • Experimental and numerical study of the dynamic behavior of an air to water heat pump 

      Ablanque Mejía, Nicolás; Torras Ortiz, Santiago; Aizpurua Udabe, Imanol; Oliet Casasayas, Carles; Rigola Serrano, Joaquim (Phetradico Communication and Publishing, 2017)
      Conference report
      Restricted access - publisher's policy
      This work is focused on studying the dynamic behavior of an air to water heat pump both experimentally and numerically. The system consists of a conventional heat pump cycle (compressor, condenser, capillary tube and ...

    • Heat Exchanger Surrogates for a Vapor Compression System 

      Loka, Nasrulloh Ratu Bagus Satrio; Ablanque Mejía, Nicolás; Torras Ortiz, Santiago; Gurumurthy, Sriram; Monti, A.; Rigola Serrano, Joaquim; Oliet Casasayas, Carles; Couckuyt, Ivo; Dhaene, Tom (Linköping University, 2023)
      Conference report
      Restricted access - publisher's policy
      Given the computationally intensive nature of heat exchanger simulators, utilizing a data-driven surrogate model for efficiently computing the heat exchanger outputs is desirable. This study focuses on developing integrated ...

    • Heat exchangers modelling and calibration for complete ECS architectures simulations 

      Ablanque Mejía, Nicolás; Torras Ortiz, Santiago; Oliet Casasayas, Carles; Rigola Serrano, Joaquim (European Conference for AeroSpace Sciences (EUCASS), 2022)
      Conference lecture
      Open Access
      The aeronautical industry is currently designing new Environmental Control System (ECS) architectures based on the More Electrical Aircraft (MEA) concept in order to improve the energy consumption efficiency inside commercial ...

    • Manual de pràctiques de laboratori de Termodinàmica (v1) 

      Torras Ortiz, Santiago; Ablanque Mejía, Nicolás; Román Concha, Frida Rosario; Oliet Casasayas, Carles; Rigola Serrano, Joaquim; Calventus Solé, Yolanda (Universitat Politècnica de Catalunya, 2023)
      Practical exercise
      Open Access

    • Modelling and experimental validation of the heat accumulator in a Low Trust Cryogenic Propulsion (LTCP) system¿¿e, 

      Torras Ortiz, Santiago; Castro González, Jesús; Rigola Serrano, Joaquim; Morales, Sergio; Riccius, Jorg; Leiner, Johannes (2013)
      Conference report
      Restricted access - publisher's policy
      The study of one of the components, the heat accumulator, of Low Thrust Cryogenic Propulsion systems (LTCP), is of scientific interest in the framework of ISP-1 project [1]. This device stores thermal energy from the fuel ...

    • Modular object-oriented methodology for the resolution of molten salt storage tanks for CSP plants 

      Oliva Llena, Asensio; Pérez Segarra, Carlos David; Rodríguez Pérez, Ivette María; Lehmkuhl Barba, Oriol; Torras Ortiz, Santiago (2012)
      Conference report
      Restricted access - publisher's policy

    • Multi-layered solid-PCM thermocline thermal storage for CSP. Numerical evaluation of its application in a 50 MWe plant 

      Galione Klot, Pedro Andrés; Pérez Segarra, Carlos David; Rodríguez Pérez, Ivette María; Torras Ortiz, Santiago; Rigola Serrano, Joaquim (2015-09-01)
      Article
      Open Access
      Thermocline storage concept is considered as a possible solution to reduce the cost of thermal storage in concentrated solar power (CSP) plants. Recently, a multi-layered solid-PCM (MLSPCM) concept—consisting of a ...

    • Multiphysics modeling and experimental validation of low temperature accumulator for cryogenic space propulsion systems 

      Torras Ortiz, Santiago; Castro González, Jesús; Rigola Serrano, Joaquim; Morales Ruíz, Sergio; Riccius, Jorg; Leiner, Johannes (2019-01-01)
      Article
      Restricted access - publisher's policy
      Within the framework of Low Thrust Cryogenic Propulsion (LTCP) systems, a low-temperature accumulator acting as thermal energy storage tank is an interesting option for cyclical processes under intermittent firings avoiding ...

    • Numerical evaluation of multi-layered solid-PCM thermocline-like tanks as thermal energy storage systems for CSP applications 

      Galione Klot, Pedro Andrés; Pérez Segarra, Carlos David; Rodríguez Pérez, Ivette María; Torras Ortiz, Santiago; Rigola Serrano, Joaquim (2015-05)
      Article
      Open Access
      The two-tank system is the technology used for thermal energy storage (TES) in current concentrating solar power (CSP) plants. Thermocline storage concept has been considered for more than a decade as a possible solution ...

    • Numerical investigation of phase change material integration in structured thermocline systems for concentrated solar power 

      Sanmartí Perona, Oriol; Vera i Fernández, Jordi; Torras Ortiz, Santiago; Pérez Segarra, Carlos David (Institute of Physics (IOP), 2024)
      Conference report
      Open Access
      The integration of encapsulated PCM in a structured thermal energy storage system is studied. The fluid and filler material are discretized using a one-dimensional approach, while the PCM is discretized two-dimensionally. ...

    • Numerical modeling and experimental validation of Thermal Energy Storage tanks for propulsion systems under cryogenic conditions 

      Torras Ortiz, Santiago; Castro González, Jesús; Rigola Serrano, Joaquim; Morales, Sergio; Galione Klot, Pedro Andrés; Lehmkuhl Barba, Oriol; Oliva Llena, Asensio (2014)
      Conference lecture
      Restricted access - publisher's policy
      Low Thrust Cryogenic Propulsion (LTCP) systems [1] need a thermal energy storage acting as a heat accumulator, where a cryogenic flow of (LOx) propellant is gasified inside, under a fast transient evaporation process. The ...

    • Numerical simulation of heat storage for domestic applications 

      Torras Ortiz, Santiago; Lehmkuhl Barba, Oriol; Rigola Serrano, Joaquim; Oliva Llena, Asensio (2011)
      Conference lecture
      Restricted access - publisher's policy
      The aim of this work is to perform a high-level numerical simulation platform for heat storage systems with or without phase change materials (PCM). The simulation allows to predict the thermal behavior of the aforementioned ...