Articles producció científica> Enginyeria Mecànica

Experimental study of an ammonia/water bubble absorber using a plate heat exchanger for absorption refrigeration machines

  • Identification data

    Identifier: imarina:5121831
    Authors:
    Cerezo, JesusBourouis, MahmoudValles, ManelCoronas, AlbertoBest, Roberto
    Abstract:
    The development of absorption chillers activated by renewable heat sources has increased due mainly to the increase in primary energy consumption that causes problems such as greenhouse gases and air pollution among others. These machines, which could be a good substitute for compression systems, could be used in the residential and food sectors which require a great variety of refrigeration conditions. Nevertheless, the low efficiency of these machines makes it necessary to enhance heat and mass transfer processes in the critical components, mainly the absorber, in order to reduce their large size. This study used ammonia-water as the working fluid to look at how absorption takes place in a plate heat exchanger operating under typical conditions of absorption chillers, driven by low temperature heat sources. Experiments were carried out using a corrugated plate heat exchanger model NB51, with three channels, where ammonia vapor was injected in bubble mode into the solution in the central channel. The results achieved for the absorption flux were in the range of 0.0025-0.0063 kg m-2 s-1, the solution heat transfer coefficient varied between 2.7 and 5.4 kW m-2 K-1, the absorber thermal load from 0.5 to 1.3 kW. In addition, the effect of the absorber operating conditions on the most significant efficiency parameters was analyzed. The increase in pressure, solution and cooling flow rates positively affect the absorber performance, on the other hand an increase in the concentration, cooling, and solution temperature negatively affects the absorber performance. © 2008 Elsevier Ltd. All rights reserved.
  • Others:

    Author, as appears in the article.: Cerezo, Jesus; Bourouis, Mahmoud; Valles, Manel; Coronas, Alberto; Best, Roberto
    Department: Enginyeria Mecànica
    URV's Author/s: Bourouis Chebata, Mahmoud / CEREZO ROMÁN, JESÚS / Coronas Salcedo, Alberto / Vallès Rasquera, Joan Manel
    Keywords: Plate heat exchanger Bubble absorber Bubble Ammonia-water Ammonia Absorption refrigeration Absorption cycle Absorption Absorber
    Abstract: The development of absorption chillers activated by renewable heat sources has increased due mainly to the increase in primary energy consumption that causes problems such as greenhouse gases and air pollution among others. These machines, which could be a good substitute for compression systems, could be used in the residential and food sectors which require a great variety of refrigeration conditions. Nevertheless, the low efficiency of these machines makes it necessary to enhance heat and mass transfer processes in the critical components, mainly the absorber, in order to reduce their large size. This study used ammonia-water as the working fluid to look at how absorption takes place in a plate heat exchanger operating under typical conditions of absorption chillers, driven by low temperature heat sources. Experiments were carried out using a corrugated plate heat exchanger model NB51, with three channels, where ammonia vapor was injected in bubble mode into the solution in the central channel. The results achieved for the absorption flux were in the range of 0.0025-0.0063 kg m-2 s-1, the solution heat transfer coefficient varied between 2.7 and 5.4 kW m-2 K-1, the absorber thermal load from 0.5 to 1.3 kW. In addition, the effect of the absorber operating conditions on the most significant efficiency parameters was analyzed. The increase in pressure, solution and cooling flow rates positively affect the absorber performance, on the other hand an increase in the concentration, cooling, and solution temperature negatively affects the absorber performance. © 2008 Elsevier Ltd. All rights reserved.
    Thematic Areas: Thermodynamics Química Medicina iii Mechanics Mechanical engineering Materiais Matemática / probabilidade e estatística Interdisciplinar Industrial and manufacturing engineering Fluid flow and transfer processes Engineering, mechanical Engenharias iv Engenharias iii Engenharias ii Engenharias i Energy engineering and power technology Energy & fuels Ciências biológicas ii Ciências ambientais Ciências agrárias i Ciência de alimentos Ciência da computação Biodiversidade Astronomia / física
    licence for use: https://creativecommons.org/licenses/by/3.0/es/
    Author's mail: alberto.coronas@urv.cat manel.valles@urv.cat mahmoud.bourouis@urv.cat
    Author identifier: 0000-0002-6109-3680 0000-0002-0748-1287 0000-0003-2476-5967
    Record's date: 2023-07-31
    Papper version: info:eu-repo/semantics/acceptedVersion
    Link to the original source: https://www.sciencedirect.com/science/article/abs/pii/S1359431108002305
    Papper original source: Applied Thermal Engineering. 29 (5-6): 1005-1011
    APA: Cerezo, Jesus; Bourouis, Mahmoud; Valles, Manel; Coronas, Alberto; Best, Roberto (2009). Experimental study of an ammonia/water bubble absorber using a plate heat exchanger for absorption refrigeration machines. Applied Thermal Engineering, 29(5-6), 1005-1011. DOI: 10.1016/j.applthermaleng.2008.05.012
    Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
    Article's DOI: 10.1016/j.applthermaleng.2008.05.012
    Entity: Universitat Rovira i Virgili
    Journal publication year: 2009
    Publication Type: Journal Publications
  • Keywords:

    Energy & Fuels,Energy Engineering and Power Technology,Engineering, Mechanical,Fluid Flow and Transfer Processes,Industrial and Manufacturing Engineering,Mechanical Engineering,Mechanics,Thermodynamics
    Plate heat exchanger
    Bubble absorber
    Bubble
    Ammonia-water
    Ammonia
    Absorption refrigeration
    Absorption cycle
    Absorption
    Absorber
    Thermodynamics
    Química
    Medicina iii
    Mechanics
    Mechanical engineering
    Materiais
    Matemática / probabilidade e estatística
    Interdisciplinar
    Industrial and manufacturing engineering
    Fluid flow and transfer processes
    Engineering, mechanical
    Engenharias iv
    Engenharias iii
    Engenharias ii
    Engenharias i
    Energy engineering and power technology
    Energy & fuels
    Ciências biológicas ii
    Ciências ambientais
    Ciências agrárias i
    Ciência de alimentos
    Ciência da computação
    Biodiversidade
    Astronomia / física
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