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CN 34-1054/N

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Energy and exergy analyses of seawater desalination system based on absorption heat transformer driven by solar energy

  • Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230027, China

Cite this:
https://doi.org/10.3969/j.issn.0253-2778.2020.05.003
  • Received Date: 17 February 2019
  • Accepted Date: 06 May 2019
  • Rev Recd Date: 06 May 2019
  • Publish Date: 31 May 2020
    Abstract

  • Abstract

    The absorption heat transformer (AHT) can raise the temperature of low-temperature thermal energy. In this study, a seawater desalination system was developed based on the AHT driven by solar energy, where AHT was used to raise the temperature of the solar collector heat source to heat and evaporate the seawater and then condense the steam to obtain fresh water while preheating the seawater. Through energy and exergy analyses of each component in the system, changes in system performance with time were obtained. Comparisons were conducted between the effects of condenser preheating or its absence on system performance. The results show that the seawater preheated by the condenser can increase the average thermal efficiency of the system by 12.9%, the average efficiency by 16.2%, and the average freshwater production by 29.2%.

    Abstract

    The absorption heat transformer (AHT) can raise the temperature of low-temperature thermal energy. In this study, a seawater desalination system was developed based on the AHT driven by solar energy, where AHT was used to raise the temperature of the solar collector heat source to heat and evaporate the seawater and then condense the steam to obtain fresh water while preheating the seawater. Through energy and exergy analyses of each component in the system, changes in system performance with time were obtained. Comparisons were conducted between the effects of condenser preheating or its absence on system performance. The results show that the seawater preheated by the condenser can increase the average thermal efficiency of the system by 12.9%, the average efficiency by 16.2%, and the average freshwater production by 29.2%.
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    • References(12)
  • [1]
    DELYANNIS E. Historic background of desalination and renewable energies[J]. Solar Energy, 2003, 75(5): 357-366.
    [2]
    KORONEOS C, DOMPROS A, ROUMBAS G. Renewable energy driven desalination systems modelling[J]. Journal of Cleaner Production, 2007, 15(5): 449-464.
    [3]
    MOH’D S A J, KAMIYA I, NARASAKI Y. Proving test for a solar-powered desalination system in Gaza-Palestine[J]. Desalination, 2001, 137: 1-6.
    [4]
    KALOGIROU S A. Seawater desalination using renewable energy sources[J]. Progress in Energy and Combustion Science, 2005, 31(3): 242-281.
    [5]
    王芳. 基于减压膜蒸馏法太阳能海水淡化系统研究[D]. 上海: 东华大学, 2016.
    [6]
    解梦秋, 郑宏飞, 李正良, 等. 吸收式太阳能海水淡化系统中降膜吸收与再生过程研究[J]. 太阳能学报, 2007, 28(5): 477-481.
    [7]
    GOMRI R. Energy and exergy analyses of seawater desalination system integrated in a solar heat transformer[J]. Desalination, 2009, 249(1): 188-196.
    [8]
    贺晓雷, 于贺军, 李建英, 等. 太阳方位角的公式求解及其应用[J]. 太阳能学报, 2008, 29(1): 69-73.
    [9]
    HAY J E. Calculation of monthly mean solar radiation for horizontal and inclined surfaces[J]. Solar Energy, 1979, 23(4): 301-307.
    [10]
    王林. 小型吸收式制冷机原理与应用[M]. 北京: 中国建筑工业出版社, 2011: 26-35.
    [11]
    KOTAS T J. The exergy method of thermal plant analysis[M]. Elsevier, 2013.
    [12]
    KHOUKHI M, MARUYAMA S. Theoretical approach of a flat plate solar collector with clear and low-iron glass covers taking into account the spectral absorption and emission within glass covers layer[J]. Renewable Energy, 2005, 30(8): 1177-1194.)
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    [1]
    DELYANNIS E. Historic background of desalination and renewable energies[J]. Solar Energy, 2003, 75(5): 357-366.
    [2]
    KORONEOS C, DOMPROS A, ROUMBAS G. Renewable energy driven desalination systems modelling[J]. Journal of Cleaner Production, 2007, 15(5): 449-464.
    [3]
    MOH’D S A J, KAMIYA I, NARASAKI Y. Proving test for a solar-powered desalination system in Gaza-Palestine[J]. Desalination, 2001, 137: 1-6.
    [4]
    KALOGIROU S A. Seawater desalination using renewable energy sources[J]. Progress in Energy and Combustion Science, 2005, 31(3): 242-281.
    [5]
    王芳. 基于减压膜蒸馏法太阳能海水淡化系统研究[D]. 上海: 东华大学, 2016.
    [6]
    解梦秋, 郑宏飞, 李正良, 等. 吸收式太阳能海水淡化系统中降膜吸收与再生过程研究[J]. 太阳能学报, 2007, 28(5): 477-481.
    [7]
    GOMRI R. Energy and exergy analyses of seawater desalination system integrated in a solar heat transformer[J]. Desalination, 2009, 249(1): 188-196.
    [8]
    贺晓雷, 于贺军, 李建英, 等. 太阳方位角的公式求解及其应用[J]. 太阳能学报, 2008, 29(1): 69-73.
    [9]
    HAY J E. Calculation of monthly mean solar radiation for horizontal and inclined surfaces[J]. Solar Energy, 1979, 23(4): 301-307.
    [10]
    王林. 小型吸收式制冷机原理与应用[M]. 北京: 中国建筑工业出版社, 2011: 26-35.
    [11]
    KOTAS T J. The exergy method of thermal plant analysis[M]. Elsevier, 2013.
    [12]
    KHOUKHI M, MARUYAMA S. Theoretical approach of a flat plate solar collector with clear and low-iron glass covers taking into account the spectral absorption and emission within glass covers layer[J]. Renewable Energy, 2005, 30(8): 1177-1194.)
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