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New calculation method for thermodynamic properties of humid air in humid air turbine cycle - The general model and solutions for saturated humid air

机译:湿空气透平循环中湿空气热力学性质的新计算方法-饱和湿空气的通用模型和解

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摘要

The article proposes a new calculation method for thermodynamic properties (i.e. specific enthalpy, specific entropy and specific volume) of humid air in humid air turbine cycle. The research pressure range is from 0.1 MPa to 5 MPa. The fundamental behaviors of dry air and water vapor in saturated humid air are explored in depth. The new model proposes and verifies the relationship between total gas mixture pressure and gas component pressures. This provides a good explanation of the fundamental behaviors of gas components in gas mixture from a new perspective. Another discovery is that the water vapor component pressure of saturated humid air equals Ps, always smaller than its partial pressure (f·Ps) which was believed in the past researches. In the new model, "Local Gas Constant" describes the interaction between similar molecules. "Improvement Factor" is proposed for the first time by this article, and it quantitatively describes the magnitude of interaction between dissimilar molecules. They are combined to fully describe the real thermodynamic properties of humid air. The average error of Revised Dalton's Method is within 0.1% compared to experimentally-based data.
机译:这篇文章提出了一种新的计算方法,用于计算湿空气涡轮机循环中湿空气的热力学性质(即比焓,比熵和比体积)。研究压力范围为0.1 MPa至5 MPa。深入探讨了干燥空气和饱和湿空气中水蒸气的基本行为。新模型提出并验证了总气体混合物压力和气体组分压力之间的关系。这从新的角度为气体混合物中气体成分的基本行为提供了很好的解释。另一个发现是饱和湿空气的水蒸气分压等于Ps,始终小于过去研究中认为的分压(f·Ps)。在新模型中,“局部气体常数”描述了相似分子之间的相互作用。本文首次提出“改进因子”,定量描述了异种分子之间相互作用的程度。它们结合起来可以充分描述湿空气的真实热力学性质。与基于实验的数据相比,修正的道尔顿方法的平均误差在0.1%以内。

著录项

  • 来源
    《Energy》 |2013年第1期|606-616|共11页
  • 作者单位

    Department of Mechanical Engineering, Shanghai Jiao Tong University, Dongchuan Road 800, Shanghai 200040, PR China;

    Department of Mechanical Engineering, Shanghai Jiao Tong University, Dongchuan Road 800, Shanghai 200040, PR China;

    Department of Mechanical Engineering, Shanghai Jiao Tong University, Dongchuan Road 800, Shanghai 200040, PR China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Humid air; Thermodynamic properties; Humid air turbine cycle; Saturation;

    机译:潮湿的空气热力学性质;湿空气涡轮机循环;饱和;

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