节点文献

Comparative Study on Two-Stage Absorption Refrigeration Systems with Different Working Pairs

  • 推荐 CAJ下载
  • PDF下载
  • 不支持迅雷等下载工具，请取消加速工具后下载。

【作者】 孔祥强； 孟祥熙； 李见波； 尚燕平； 崔福林；

【Author】 KONG Xiangqiang;MENG Xiangxi;LI Jianbo;SHANG Yanping;CUI Fulin;College of Mechanical and Electronic Engineering,Shandong University of Science and Technology;

【通讯作者】 孔祥强;

【机构】 College of Mechanical and Electronic Engineering,Shandong University of Science and Technology；

【摘要】 The objective of this paper is to present a simulation study on the two-stage absorption refrigeration systems of 2.5 kW capacity using LiBr-H2O,NH3-H2O and R124-DMAC as working pairs.Under the design condition that the generating,absorbing,evaporating and condensing temperatures are 75℃,45℃,5℃and40℃,respectively,the high and low pressure side solution circulation ratios and the coefficient of performance（COP） for the systems are calculated.Then the influences of medium,generating,absorbing,evaporating and condensing temperatures on system performances are analyzed.The results show that under the design condition,the COP of the LiBr-H2O system can reach 0.49,superior to those of the NH3-H2O and R124-DMAC systems,which are 0.32 and 0.31,respectively.Furthermore,the medium temperature for higher COP lies in an interval of64—67℃for the LiBr-H2O,NH3-H2O and R124-DMAC systems.High generating temperature and low absorbing temperature can decrease the high and low pressure side solution circulation ratios,and can also increase the COP.High evaporating temperature can decrease the low pressure side solution circulation ratio and increase the COP.Low condensing temperature can decrease the high pressure side solution circulation ratio and increase the COP.

【Abstract】 The objective of this paper is to present a simulation study on the two-stage absorption refrigeration systems of 2.5 kW capacity using LiBr-H2O,NH3-H2O and R124-DMAC as working pairs.Under the design condition that the generating,absorbing,evaporating and condensing temperatures are 75℃,45℃,5℃and40℃,respectively,the high and low pressure side solution circulation ratios and the coefficient of performance（COP） for the systems are calculated.Then the influences of medium,generating,absorbing,evaporating and condensing temperatures on system performances are analyzed.The results show that under the design condition,the COP of the LiBr-H2O system can reach 0.49,superior to those of the NH3-H2O and R124-DMAC systems,which are 0.32 and 0.31,respectively.Furthermore,the medium temperature for higher COP lies in an interval of64—67℃for the LiBr-H2O,NH3-H2O and R124-DMAC systems.High generating temperature and low absorbing temperature can decrease the high and low pressure side solution circulation ratios,and can also increase the COP.High evaporating temperature can decrease the low pressure side solution circulation ratio and increase the COP.Low condensing temperature can decrease the high pressure side solution circulation ratio and increase the COP.

【关键词】 absorption refrigeration； two-stage system； working pair； cycle characteristics；
【Key words】 absorption refrigeration； two-stage system； working pair； cycle characteristics；
【基金】 the National Natural Science Foundation of China (No.51776115);the Shandong Province Graduate Student Supervisor Guidance Ability Promotion Program (No.SDYY17037);the Shandong University of Science and Technology Graduate Student Supervisor Guidance Ability Promotion Program(No.KDYC17009)
  • 【文献出处】 Journal of Shanghai Jiao Tong University(Science) ,上海交通大学学报(英文版) , 编辑部邮箱 ,2021年02期
  • 【分类号】TB651
打印本页
节点文献中：