流体机械

2008, No.429(03) 71-75

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基于马丁-侯方程的CO_2超临界压力区热力性质的快速计算方程建立
Fast Calculation of Thermodynamic Properties of CO_2 in Supercritical Pressure Region Based on the Martin-hou Equation of State

胡欢;谷波;龙琼;曾伟平;张春路;
HU Huan1,GU Bo1,LONG Qiong1,ZENG Wei-ping1,ZHANG Chun-lu2 (1.Shanghai Jiaotong University,Shanghai 200240,China;2.Carrier China R&D Ltd.,Shanghai 201206,China)

摘要(Abstract):

提出了二氧化碳超临界压力区热力性质的显式计算模型。由于模型为显式形式,不存在迭代,保证了热力性质计算的高速性和绝对稳定性。以REFPROP7的计算结果作为数据源,对制冷剂环保替代中重要的自然工质二氧化碳的热力性质在压力为临界压力至三倍临界压力的区域进行拟合,并将该快速计算模型与REFPROP7相应公式的计算结果进行对比。对比结果表明,所有快速计算模型的总平均偏差小于0.193%,最大偏差小于13.85%。
An explicit fast calculation model for CO2 thermodynamic in supercritical pressure region,covering pressure from the pressure of critical point to three times of it,is presented.This method can guarantee the calculation stability and high calculation speed of thermodynamic properties of CO2 for its explicit expression and no need of iteration.The source data is calculated from REFPROP7,and the calculation accuracy of the fast calculation model is also validated by the comparison with REFPROP7.The total mean relative deviation and maximum relative deviation for all fast calculation models are less than 0.193 % and 13.85 %,respectively.

关键词(KeyWords): 二氧化碳;热力性质;超临界压力;快速计算
CO2;thermodynamic properties;supercritical pressure;fast calculation

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作者(Author): 胡欢;谷波;龙琼;曾伟平;张春路;
HU Huan1,GU Bo1,LONG Qiong1,ZENG Wei-ping1,ZHANG Chun-lu2 (1.Shanghai Jiaotong University,Shanghai 200240,China;2.Carrier China R&D Ltd.,Shanghai 201206,China)

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