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Quasi-dynamic model for an organic Rankine cycle

机译：有机朗肯循环的准动力学模型

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摘要

When considering solar based thermal energy input to an organic Rankine cycle (ORC), intermittent nature of the heat input does not only adversely affect the power output but also it may prevent ORC to operate under steady state conditions. In order to identify reliability and efficiency of such systems, this paper presents a simplified transient modeling approach for an ORC operating under variable heat input. The approach considers that response of the system to heat input variations is mainly dictated by the evaporator. Consequently, overall system is assembled using dynamic models for the heat exchangers (evaporator and condenser) and static models of the pump and the expander. In addition, pressure drop within heat exchangers is neglected. The model is compared to benchmark numerical and experimental data showing that the underlying assumptions are reasonable for cases where thermal input varies in time. Furthermore, the model is studied on another configuration and mass flow rates of both the working fluid and hot water and hot water's inlet temperature to the ORC unit are shown to have direct influence on the system's response.
机译：当考虑将太阳能热能输入有机朗肯循环（ORC）时，热输入的间歇性不仅会对功率输出产生不利影响，而且可能会阻止ORC在稳态条件下运行。为了确定此类系统的可靠性和效率，本文针对在可变热量输入下运行的ORC提供了一种简化的瞬态建模方法。该方法认为系统对热输入变化的响应主要由蒸发器决定。因此，整个系统使用热交换器（蒸发器和冷凝器）的动态模型以及泵和膨胀机的静态模型组装而成。另外，热交换器内的压降可以忽略。将模型与基准数值和实验数据进行比较，结果表明基本假设对于热输入随时间变化的情况是合理的。此外，该模型是在另一种配置下进行研究的，工作流体和热水的质量流率以及ORC单元的热水入口温度都显示出对系统响应的直接影响。

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  • 来源
    《Energy Conversion & Management》 |2013年第8期|117-124|共8页
  • 作者

    Musbaudeen O. Bamgbopa; Eray Uzgoren;

  • 作者单位

    Sustainable Environment and Energy Systems, Middle East Technical University, Northern Cyprus Campus, Kalkanli, Cuzelyurt, TRNC, Mersin 10, Turkey;

    Sustainable Environment and Energy Systems, Middle East Technical University, Northern Cyprus Campus, Kalkanli, Cuzelyurt, TRNC, Mersin 10, Turkey;

  • 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

    Organic Rankine cycle; Transient analysis; Solar energy; R245fa;

    机译：有机朗肯循环;瞬态分析;太阳能;R245fa;

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