摘要
对一种新型并联型可调功冷比例的卡林纳循环在制冰时段的性能进行了模拟计算及分析,在第一回热器中增加了换热面,引入第二回热器出口稀溶液参与对基本溶液的加热,分析了循环工作浓度、分流比、锅炉泡点处端差、过热度等参数对循环性能的影响。结果表明:随着锅炉泡点处端差的增加,循环的分流比范围逐渐增大;当端差由20 K增大为60 K时,循环最小分流比范围可以从0.518~1.000扩展为0.383~1.000,此时循环所输出的最大制冷量从315.4 kW增大为489.7 kW,但动力回收效率有所降低。
The performance of a new parallel type Kalina cycle with adjustable power/cold ratio was simulated and analyzed in the period of ice making.The heat exchange surface in the first regenerator was increased to introduce the dilute solution from the second regenerator to participate in the heating of the basic solution.The effects of the following factors on the cycle performance were analyzed,such as the working medium concentration,split fraction,pinch temperature difference at boiler bubble point and the superheat degree.Results show that the cycle split fraction gradually increases with the rise of pinch temperature difference at boiler bubble point.When the pinch temperature difference is increased from 20 K to 60 K,the range of minimum split fraction of cycle can be extended from 0.5181.000 to 0.3831.000,while the maximum refrigeration output of cycle is increased from 315.4 kW to 489.7 kW,but the power recovery efficiency is somewhat reduced.
作者
方芳
陈亚平
吴嘉峰
张少波
Fang Fang;Chen Yaping;Wu Jiafeng;Zhang Shaobo(School of Energy and Environment, Southeast University, Nanjing 210096, China)
出处
《发电设备》
2020年第6期379-385,391,共8页
Power Equipment
基金
国家自然科学基金项目(51776035)。
关键词
功冷联供
卡林纳循环
热力学分析
分流比
端差
可调功冷比例
power and refrigeration cogeneration
Kalina cycle
thermodynamic analysis
split fraction
pinch temperature difference
adjustable power/cold ratio