小型太阳能吸收式空调系统的仿真研究  

Simulationand Analysis for a Small Solar Absorption Refrigeration System

作　　者：马瑞 谢应明[1] 庄雅琪 MA Rui;XIE Ying-ming;ZHUANG Ya-qi(University of Shanghai for Science and Technology,School of Energy and Power Engineering, Shanghai,China,Post Code :200082)

机构地区：[1]上海理工大学能源与动力工程学院,上海200082

出　　处：《热能动力工程》2019年第2期132-136,156,共6页Journal of Engineering for Thermal Energy and Power

基　　金：国家自然科学基金资助项目(50806050);上海市教委科研创新项目(14YZ097)~~

摘　　要：以20 kW太阳能溴化锂单效吸收式制冷系统为仿真对象,从制冷量及系统能效比(COP)两方面分析了热媒水、冷却水、冷冻水对系统的影响,同时,考虑到太阳辐射与其他外界环境的不断变化,在仿真过程中将模糊控制与PID(比例-积分-微分)控制相结合,使得电加热量不断做出调整,以更节能的方式避免了热媒水水温的波动,仿真结果表明:集热器瞬时效率随入口水温的升高而降低;随着热媒水由92℃增长到98℃,COP由0. 62提升到0. 74;冷却水入口温度的上升会使COP及制冷量逐渐降低;制冷量与COP随冷冻水入口温度升高均有所增加,但增长速率逐渐放缓。With the simulation object of a small solar energy lithium bromide single-effect absorption refrigeration system,which could provide 20 kW thermal load,the effects of heat medium water,cooling water,and chilled water on the refrigerating output and COP are investigated and analyzed. At the same time,considering the constant changes in solar radiation and other external environments,the fuzzy control with PID( proportional-integral-derivative) control is combined to avoid the fluctuation of thermal water temperature for more energy-saving. The results show that the instantaneous efficiency of heat collector would decrease if the inlet water temperature increases. For example,when the heat medium water temperature rises from 92 ℃ to 98 ℃,COP will increase from 0. 62 to 0. 74,the refrigerating output and COP will be decreased gradually with the increase in the inlet temperature of cooling water,and the chilled water inlet temperature increases,leading to slow increase in the COP and refrigerating output.

关 键 词：吸收式制冷 运行状态 模糊控制 制冷量 COP 

分 类 号：TK511.3[动力工程及工程热物理—热能工程]