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CO_2跨临界动力循环性能理论及实验研究
Theoretical and Experimental Study on Performance of CO_2 Transcritical Power Cycle
查看参考文献8篇
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文摘
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非常规工质动力循环具有高效回收低品位热能的显著优势,CO_2环境友好,是较为理想的利用低品位热能的动力循环工质。采用理论和实验方法研究了 CO_2跨临界动力循环的理论循环性能和膨胀机性能。研究结果表明,无回热时导热油出口温度随加热压力的升高而升高,并且不随膨胀机进口温度的变化而变化;有回热时导热油出口温度受回热器换热的影响存在极大值。随着超临界加热压力的升高,循环热效率和净输出功率存在极大值;回热能够显著提高循环热效率和净输出功率。初步实验结果表明内部泄露对CO_2滚动转子膨胀机性能具有重要影响,为提升膨胀机性能需尽量降低膨胀机内部泄露。 |
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其他语种文摘
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Power cycle using unconventional working fluid has significant advantages in recovering low-grade heat energy efficiently. CO_2 is environment friendly and is an ideal working fluid for power cycle using low-grade heat energy. Theoretical and experimental methods are used to study on theoretical cycle performance of CO_2 transcritical power cycle and expander performance. The results show that when regenerator is not used, thermal oil outlet temperature increases with the increase of heating pressure and doesn't vary with inlet temperature at turbine entrance. When regenerator is used, there is maximum of thermal oil outlet temperature with the increase of heating pressure. There are maximum thermal efficiency and net power output with the increase of heating pressure. Regenerator can enhance thermal efficiency and net power output significantly. Preliminary experimental results show that internal leakage impacts on CO_2 rolling rotor expander performance and internal leakage should be as lower as possible in order to enhance expander performance. |
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来源
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工程热物理学报
,2015,36(3):478-481 【核心库】
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关键词
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CO_2
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跨临界动力循环
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回热器
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滚动转子膨胀机
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地址
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中国科学院力学研究所, 高温气体动力学国家重点实验室, 北京, 100190
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0253-231X |
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学科
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能源与动力工程 |
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基金
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国家自然科学基金资助项目
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文献收藏号
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CSCD:5372509
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