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首页> 外文期刊>Heat Transfer Engineering >Off-Design Analysis of a Supercritical CO_2 Brayton Cycle with Ambient Air as the Cold Source Driven by Waste Heat from Gas Turbine
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Off-Design Analysis of a Supercritical CO_2 Brayton Cycle with Ambient Air as the Cold Source Driven by Waste Heat from Gas Turbine

机译：超临界CO_2 Brayton循环与环境空气作为燃气涡轮机驱动的冷源的超临界CO_2布雷顿循环的偏移设计分析

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摘要

Utilizing energy efficiently could greatly relieve current energy crisis. Therefore, in this article, a simple supercritical CO_2 Brayton cycle for waste heat recovery from gas turbine is presented. The system uses ambient air as its cold source, which is more convenient and economic. Considering temperature difference between heat source and turbine inlet, it is of great significance to research the effects of turbine inlet temperature on the system performance due to the high temperature range of the exhaust gas from gas turbine. For this purpose, a control strategy is proposed and a mathematical model is established on off-design conditions to predict system performance when turbine inlet temperature increases from 673.15 K to 773.15 K. Results indicate that both turbine power output and system net power output increase with the rise of turbine inlet temperature, as well as total heat transfer in heater and cooler. Furthermore, the system thermal efficiency also increases until it becomes maximum on design point. In addition, the efficiency of turbomachinery varies slightly.
机译：有效地利用能源可以大大缓解当前能源危机。因此，在本文中，提出了一种简单的超临界CO_2布雷顿循环，用于废气涡轮机废热回收。该系统使用环境空气作为其冷源，这更方便和经济。考虑到热源和涡轮机入口之间的温差，对于研究汽轮机的高温范围，研究涡轮机入口温度对系统性能的影响具有重要意义。为此，提出了一种控制策略，并且在涡轮机入口温度从673.15 k增加到773.15k时，建立了在非设计条件下建立数学模型，以预测系统性能。结果表明涡轮机电源输出和系统净功率输出增加涡轮机入口温度的兴起，以及加热器和冷却器的总热传递。此外，系统热效率也会增加，直到设计点最大限度地增加。此外，涡轮机械的效率略有不同。

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  • 来源
    《Heat Transfer Engineering》 |2021年第18期|1321-1331|共11页
  • 作者

    Jianming Han; Qingya Ma; Zihua Wang; Mengjuan Xu; Yunfei Song; Jiangfeng Wang; Yiping Dai;

  • 作者单位

    Institute of Turbomachinery State Key Laboratory of Multiphase Flow in Power Engineering;

    Institute of Turbomachinery State Key Laboratory of Multiphase Flow in Power Engineering;

    Institute of Turbomachinery State Key Laboratory of Multiphase Flow in Power Engineering;

    Institute of Turbomachinery State Key Laboratory of Multiphase Flow in Power Engineering;

    Institute of Turbomachinery State Key Laboratory of Multiphase Flow in Power Engineering;

    Institute of Turbomachinery State Key Laboratory of Multiphase Flow in Power Engineering;

    Institute of Turbomachinery State Key Laboratory of Multiphase Flow in Power Engineering;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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