| 摘要: |
| 本文建立了LiBr-H2O吸收式热泵系统的理论模型，对热泵系统的热力学循环进行模拟计算。分析了不同操作参数（包括循环倍率、低温废水入口温度、热水入口温度、高温蒸汽入口温度）对热泵的性能系数（COP）、火积效率、?效率和熵产这4种性能评价指标的影响规律，对比了这4种性能评价标准下的系统性能变化的一致性，并探讨了作为新指标的火积效率是否适用于吸收式热泵分析。模拟结果表明：当循环倍率、热水入口温度和高温蒸汽入口温度增加时，热泵系统性能均变差，只有低温废水入口温度升高时，系统性能才逐渐提高。计算结果表明：在不同的操作参数条件下4种性能评价指标变化并不一致，有些甚至相反，但COP和火积效率的变化趋势却始终保持了很好的一致性，因此说明火积效率也可以用于吸收式热泵的性能分析。 |
| 关键词: 吸收式热泵 COP 性能分析 火积 㶲效率 熵产 |
| DOI： |
| 投稿时间：2018-11-28 修订日期：2018-02-07
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| 基金项目:国家电网公司总部科技项目“非市政集中采暖区电采暖规划及优化运行技术研究”资助。 |
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| Thermodynamic Analysis of LiBr-H2O Absorption Heat Pump |
|
Cheng Ling1, Zhang Jing2, Jin Lu1, Li Kecheng1, Tao Wenquan2
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| (1.China Electric Power Research Institute;2.Key Laboratory of Thermal Fluid Science and Engineering of Ministry of Education, School of Energy & Power Engineering, Xi'an Jiaotong University) |
| Abstract: |
| A theoretical model for analysis of single stage LiBr-H2O absorption heat pump was established and computer simulation for its thermodynamic cycle performance was conducted. The effects of varying operation conditions (circulation ratio, inlet temperature of low temperature waste water, inlet temperature of hot water and inlet temperature of high temperature vapor) on the four performance criteria (COP, entransy efficiency, exergy efficiency and entropy generation) are investigated, and the consistency of the four criteria are examined. It is found that the performance was degraded with the increases circulation ratio, inlet temperature of hot water and inlet temperature of high temperature vapor. Only when the inlet temperature of waste water increased, the performance was improved. It is also found that the variation trends of the four criteria with the operation conditions were different, and some were even opposite. To be specific, the increase of hot water inlet temperature worsens the system performance according to COP and entransy efficiency while improves the system performance according to exergy efficiency and entropy generation. However, the results obtained by the COP agree well with those by the entransy efficiency, indicating that the entransy efficiency is feasible for the heat pump performance analysis. |
| Key words: absorption heat pump COP performance analysis entransy exergy efficiency entropy generation |
