流体机械

2002, (10) 43-46

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二氧化碳膨胀机的热力计算与选型分析
Thermodynamic Calculation and Analysis of Carbon Dioxide Expander

马一太,魏东,查世彤,李敏霞
Ma Yitai Wei Dong Zha Shitong Li Minxia

摘要(Abstract):

从往复式、转子式、螺杆式和涡旋式膨胀机的几何结构出发 ,对其膨胀过程进行了理论分析 ,并研究了各自的运动规律。通过对带有不同类型膨胀机的CO2 跨临界系统进行热力计算 ,得出了各种膨胀机的实际功率范围和特征结构尺寸。考虑到超临界二氧化碳的膨胀特性 ,提出了理想的CO2 膨胀机应该满足的要求并比较了它们各自的优缺点
From the viewpoint of geometric structure of reciprocating, rotary, scroll, and screw expander, CO 2 expansion process and their movement characteristics were analyzed respectively. On the basis of thermodynamic calculation for CO 2 transcritical system with different expander, the actual recover power and structural size are obtained. Considering the expansion behavior of supercritical CO 2, the general requirements of ideal expander are put forward and the pros and cons of different type of expanders are also compared.

关键词(KeyWords): 二氧化碳;膨胀机;跨临界循环;自然工质
carbon dioxide;expander;transcritical cycle;natural refrigerants

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基金项目(Foundation): 国家自然科学基金项目 (5 98760 2 8);; 高等学校博士学科点专项科研基金课题 (D0 2 0 0 10 5 )

作者(Author): 马一太,魏东,查世彤,李敏霞
Ma Yitai Wei Dong Zha Shitong Li Minxia

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