摘要
提出和研究了一种可根据用户所需调节比例的功/冷联供卡林纳循环系统.在三压力卡林纳循环基础上增加了一条由发生精馏塔、冷凝器、蒸发器和过冷器组成的制冷子回路,与锅炉和透平组成的动力回路相并联.新增制冷回路将锅炉出口热源进一步利用后提供额外制冷量,从而提升整个循环的综合性能.制冷蒸发器中的蒸发压力由循环基本溶液浓度所决定,因此制冷温度可以保持在较低水平(-25^-5℃).研究结果表明,在烟气热源、冷却水进口温度分别为350和32℃的条件下,系统取工作浓度0.54及对应的最小分流比0.53时,循环性能最佳,其综合动力回收效率可达23.41%,比相同条件下优化后的常规三压力卡林纳循环及氨水朗肯循环的动力回收效率分别提高了17.28%和43.18%.
A power/refrigeration cogeneration system was proposed and investigated based on the triple pressure Kalina cycle with the adjustable ratio of power and refrigeration capacities according to the user demands. The refrigeration branch, including generation-rectification column, condenser, evaporator and subcooler, was added parallel to the power generation branch of boiler and turbine, to further utilize the heat source from the boiler exit and to provide an additional refrigeration capacity, improving the performance of the entire cycle system. The pressure in the evaporator was determined by the basic solution of the cycle, thus the refrigeration temperature could be kept at -25 to -5 ℃. The results show that under the conditions of flue gas heat source and cooling water inlet temperatures of 350 and 32 ℃, the optimum cycle performance can be achieved with work concentration of 0.54 and the corresponding minimum split fraction of 0.53, and the comprehensive power recovery efficiency can reach 23.41%, which is 17.28% and 43.18% higher than that of the conventional triple pressure Kalina cycle and ammonia-water Rankine cycle under the same conditions.
作者
张少波
陈亚平
吴嘉峰
朱子龙
Zhang Shaobo;Chen Yaping;Wu Jiafeng;Zhu Zilong(Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education,Southeast University,Nanjing 210096,China;School of Energy and Environment,Southeast University,Nanjing 210096,China)
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2019年第3期514-519,共6页
Journal of Southeast University：Natural Science Edition
基金
国家自然科学基金资助项目(51776035)
关键词
氨水工质
卡林纳循环
分流比
功/
冷联供
综合动力回收效率
ammonia water mixture
Kalina cycle
split fraction
power/refrigeration cogeneration
comprehensive power recovery efficiency
