| 摘要: |
| 针对氨系、水系、氟利昂系等传统吸收式制冷工质对的缺陷，提出以[emim][Tf2N]为吸收剂的二元混合体系CO2-[emim][Tf2N]作为新型吸收制冷工质对。通过将PR状态方程和NRTL活度系数模型结合为一体，并以立方型方程和超额自由能模型结合得到的WS混合规则为纽带，建立GE-EOS热力学模型，得到高温高压下二元混合体系的超额吉布斯自由能，计算结果表明：当温度为453.15 K，压力为13.374 MPa，CO2液相摩尔分数为0.392时，CO2-[emim][Tf2N]二元混合体系的超额吉布斯自由能存在最大值。 |
| 关键词: CO2-[emim][Tf2N] 状态方程 混合法则 超额吉布斯自由能 |
| DOI： |
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| 基金项目: |
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| Prediction of Excess Gibbs Free Energy for a New Working Pair CO2-[emim][Tf2N] in Absorption Refrigeration |
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He Lijuan, Zhu Chaoqun, Liang Jingjing
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| (Institute of Energy and Environment, Inner Mongolia University of Science and Technology) |
| Abstract: |
| In view of the defects of traditional working pairs such as ammonia system, water system and Freon system,a new working pair, CO2-[emim][Tf2N], was proposed for the absorption refrigeration cycle. PR equation of state, NRTL model, and WS mixing rule which was obtained from cubic equation and the excess free energy model were utilized to develop GE-EOS thermodynamic model in the paper. The excess Gibbs free energy of binary mixture solution under high pressure and high temperature were obtained with the model. The results showed that the excess Gibbs free energy of the binary mixture solution had maximum when temperature is 453.15 K, pressure is 13.374 MPa and CO2 mole fraction in the liquid phase is 0.392. |
| Key words: CO2-[emim][Tf2N] equation of state mixing rule excess Gibbs free energy |
