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Effects of the generator and evaporator temperature differences on a double absorption heat transformer-Different control strategies on utilizing heat sources

机译：发生器和蒸发器温度差对双吸收式热转换器的影响-利用热源的不同控制策略

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摘要

The combination of the absorption heat transformer with renewable energy systems, like solar thermal systems, is raising more and more concern. In those combined systems the strategies on utilizing heat sources can affect system thermodynamic performance significantly. Therefore, this study presents a detailed analysis on the effect of the heat source temperature and different heat source flow patterns on the performance of a double absorption heat transformer (DAHT). A detailed comparative study is carried out to clarify the impact of the generator and evaporator temperature differences (GETD) on the coefficient of performance (COP), exergy efficient (ECOP), exergy destruction rates in the individual components and heat transfer areas needed for each component. The results show that the generator, condenser and absorber-evaporator are responsible for most of the exergy destruction rate in the DAHT system; the parallel-flow configuration (the generator temperature is equal to the evaporator temperature) performs better under the high gross temperature lift conditions; in the case of the counter flow configuration (the generator temperature is relatively higher), better performance can be obtained in both the COP and ECOP under the proper heat source temperature (85 and 95 degrees C); the fair-flow configuration (higher temperature in the evaporator) is not recommended in this paper due to no advantages found in either thermodynamic performance or system size. (C) 2017 Elsevier Ltd. All rights reserved.
机译：吸收式热转换器与可再生能源系统（例如太阳能热系统）的结合越来越引起人们的关注。在那些组合的系统中，利用热源的策略会显着影响系统的热力学性能。因此，本研究详细分析了热源温度和不同热源流型对双吸收式热转换器（DAHT）性能的影响。进行了详细的比较研究，以阐明发生器和蒸发器的温差（GETD）对性能系数（COP），能效效率（ECOP），单个组件的能级破坏率和每个组件所需的传热面积的影响。零件。结果表明，在DAHT系统中，发生器，冷凝器和吸收器-蒸发器是造成最大火用破坏率的原因。在高总温度升程条件下，平行流配置（发电机温度等于蒸发器温度）表现更好；在逆流配置的情况下（发电机温度相对较高），在适当的热源温度（85和95摄氏度）下，COP和ECOP均可获得更好的性能；由于在热力学性能或系统尺寸上都没有优势，因此不建议采用公平流动配置（蒸发器中温度较高）。 （C）2017 Elsevier Ltd.保留所有权利。

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  • 来源
    《Energy Conversion & Management》 |2017年第4期|12-21|共10页
  • 作者

    Wang Hanzhi; Li Huashan; Bu Xianbiao; Wang Lingbao;

  • 作者单位

    Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China|CAS Key Lab Renewable Energy, Guangzhou 510640, Guangdong, Peoples R China|Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Guangdong, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

    Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China|CAS Key Lab Renewable Energy, Guangzhou 510640, Guangdong, Peoples R China|Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Guangdong, Peoples R China;

    Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China|CAS Key Lab Renewable Energy, Guangzhou 510640, Guangdong, Peoples R China|Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Guangdong, Peoples R China;

    Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China|CAS Key Lab Renewable Energy, Guangzhou 510640, Guangdong, Peoples R China|Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Guangdong, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Exergy destruction rate; Double absorption heat transformer; Generator temperature; Evaporator temperature; Heat source temperature; Control strategies;

    机译：火用破坏率;双吸收式热转换器;发电机温度;蒸发器温度;热源温度;控制策略;

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