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首页> 外文期刊>Thermal engineering >Thermodynamic Evaluation of the Possibility to Increase Cogeneration Turbine Efficiency by Using a Heat Pump Operating with Steam
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Thermodynamic Evaluation of the Possibility to Increase Cogeneration Turbine Efficiency by Using a Heat Pump Operating with Steam

机译：通过使用带有蒸汽的热泵提高热电联产涡轮机效率的热力学评估

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摘要

Cogeneration turbines operate in different operation modes that considerably differ as to the working process conditions. In summer time, when heat demand is minimal, almost all steam flow passes through all turbine stages and enters into the condenser (condensing mode of operation). When heat supply is needed, the steam bleed-offs are used. The several last stages of the turbine (low-pressure part-LPP) have a control diaphragm at the inlet. When the heat supply is large, the diaphragm is maximally closed, and the entire steam flow, with an exception for a minimal ventilation flow is delivered to the steam bleed-offs (cogeneration mode). LPP flow path is designed for the optimal operation in the condensing mode. While running in cogeneration mode, the LPP operating conditions are far from optimal. Depending on the ventilation steam flow rate and outlet pressure, the LPP power can drop to zero or even become negative (ventilation mode). It is proposed to control an outlet steam pressure by using the heat pump that operates with steam. The heat pump energy consumption can be compensated and even exceeded by optimizing the steam expansion process in LPP. In this respect, operating conditions of cogeneration turbine LPPs during the cold season are analyzed. A brief description of a heat pump operating with steam is made. The possibility of increasing cogeneration turbine efficiency by using a steam heat pump is shown.
机译：热电联产涡轮机在不同的运行模式下运行，这些运行模式在工作过程条件方面存在很大差异。在夏季，当热量需求最小时，几乎所有蒸汽流都将穿过所有涡轮机级并进入冷凝器（冷凝操作模式）。当需要供热时，使用蒸汽排放装置。涡轮机的最后几个阶段（低压部分-LPP）在入口处具有控制膜片。当供热较大时，膜片最大程度地关闭，并且除最小的通风量外，整个蒸汽流都被输送到蒸汽放气口（热电联产模式）。 LPP流路设计为在冷凝模式下实现最佳运行。在热电联产模式下运行时，LPP的运行条件远非最佳。根据通风蒸汽流量和出口压力，LPP功率可能降至零甚至变为负值（通风模式）。提出了通过使用与蒸汽一起运行的热泵来控制出口蒸汽压力。通过优化LPP中的蒸汽膨胀过程，可以补偿甚至超过热泵的能耗。在这方面，分析了热电联产涡轮LPP在寒冷季节的运行条件。简要描述了用蒸汽运行的热泵。显示了通过使用蒸汽热泵来提高热电联产涡轮机效率的可能性。

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  • 来源
    《Thermal engineering》 |2016年第1期|1-6|共6页
  • 作者

    V. M. Batenin; V. V. Datsenko; Yu. A. Zeigarnik; A. S. Kosoi; M. V. Sinkevich;

  • 作者单位

    Joint Institute for High Temperatures, Russian Academy of Sciences, ul. Izhorskaya 13, bd. 2, Moscow, 125412 Russia;

    Joint Institute for High Temperatures, Russian Academy of Sciences, ul. Izhorskaya 13, bd. 2, Moscow, 125412 Russia,Moscow Power Engineering Institute (MPEI, National Research University), ul. Krasnokazarmennaya 14, Moscow, 111250 Russia;

    Joint Institute for High Temperatures, Russian Academy of Sciences, ul. Izhorskaya 13, bd. 2, Moscow, 125412 Russia;

    Joint Institute for High Temperatures, Russian Academy of Sciences, ul. Izhorskaya 13, bd. 2, Moscow, 125412 Russia,Moscow Power Engineering Institute (MPEI, National Research University), ul. Krasnokazarmennaya 14, Moscow, 111250 Russia;

    Joint Institute for High Temperatures, Russian Academy of Sciences, ul. Izhorskaya 13, bd. 2, Moscow, 125412 Russia;

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

    Steam turbine; cogeneration turbine; condenser; heat pump; operation mode; ventilation flow; thermodynamic process;

    机译：汽轮机;热电联产涡轮机冷凝器热泵;操作模式;通风量热力学过程;

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