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中国电机工程学报 2008, 28(17) 1-7 DOI:
ISSN: 0258-8013 CN: 11-2107/TM |
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| 热能工程 |
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氨吸收式动力/制冷复合循环的敏感性分析 |
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罗尘丁 张娜 蔡睿贤 刘猛 |
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中国科学院工程热物理研究所 中国科学院工程热物理研究所 中国科学院工程热物理研究所 中国科学院研究生院 |
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摘要:
对氨水混合工质动力/制冷正逆耦合循环进行了模拟计算分析,该循环通过分流、精馏、吸收冷凝,满足了不同热力过程对工质氨浓度的不同需求。选取热效率h、火用效率e等指标作为评价准则,当循环透平进汽参数为375 ℃/7 000 kPa时,h约为20%,e约为40%。对循环重要参数分流比S、基本工质氨质量浓度X变化对热力性能、评价准则的影响进行敏感性分析,讨论不同X下如何设置分流比S使循环能量利用更为合理。研究表明:综合考虑循环功冷联供性能、经济性能等因素,建议分流比S取0.4左右,基本工质氨质量浓度X取0.28~0.32。如需较大的冷输出,可适当加大S及X,但S过高(>0.8)循环热力性能会恶化。
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关键词:
动力/制冷正逆耦合循环
氨水混合工质
分流比
工质浓度
热力性能
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Sensitivity Analysis of Ammonia Absorption Power/ Refrigeration Combined Cycle |
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LUO Chen-ding ZHANG Na CAI Rui-xian LIU Meng |
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Institute of Engineering Thermophysics, Chinese Academy of Sciences Institute of Engineering Thermophysics, Chinese Academy of Sciences Institute of Engineering Thermophysics, Chinese Academy of Sciences Graduate School of the Chinese Academy of Sciences |
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Abstract:
An ammonia absorption power/refrigeration combined (APC) cycle was simulated and analyzed. The desirable working fluid ammonia concentrations in both cycle heat addition and condensation process were maintained by introducing a split/absorption condensation process. The system performance was evaluated in terms of energy and exergy efficiencies, which were found to be about 20% and 40% with the turbine inlet parameters being 375 ℃/7 000 kPa. Parametric sensitivity study was conduced to investigate the influence of some key parameters, including the split fraction S and the basic working fluid ammonia concentration X, on the cycle thermodynamic performance. It is found that there exist optimal S values around 0.4 which maximize the efficiencies, and the desirable X range is 0.28~0.32. Higher S and X favor the refrigeration output, but too high S (>0.8) deteriorates the system performance. |
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Keywords:
power/refrigeration combined cycle
ammonia-water
split fraction
ammonia concentration
thermodynamic performance
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收稿日期 2007-12-11 修回日期 1900-01-01 网络版发布日期 |
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DOI: |
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基金项目:
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通讯作者: 罗尘丁 |
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作者简介: |
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作者Email: luochending06@mails.gucas.ac.cn |
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| Copyright by 中国电机工程学报 |