Modeling and performance analysis of Rankine cycle coupled double-effect lithium bromide absorption refrigeration
LIU Jian
TAN Xianlin
BI Cheng
LIANG Ziyuan
FU Yule
ZENG Yang
YANG Yuanzhi
Abstract：In order to improve the efficiency of waste heat recovery in marine diesel engines,MATLAB is used to model and thermal dynamically analyze the Rankine cycle and dual effect lithium bromide absorption refrigeration system.The factors affecting the thermal efficiency of the Rankine cycle and the effects of exhaust gas temperature,high-pressure generator temperature,and low-pressure generator temperature on the refrigeration capacity and performance coefficient during the dual effect lithium bromide absorption refrigeration stage are determined.The results indicate that the optimal working fluid for the Rankine cycle is water.Raising the initial temperature,the initial pressure and reducing back pressure can improve the thermal efficiency of the Rankine cycle.As the exhaust gas temperature increases,the refrigeration capacity of the dual effect lithium bromide absorption refrigeration system increases,and the refrigeration performance coefficient decreases.As the temperature of the high-pressure generator increases,the cooling capacity decreases and the coefficient of refrigeration performance decreases.As the temperature of the low-pressure generator decreases,the cooling capacity increases and the refrigeration performance coefficient decreases.The relevant parameters of the dual effect lithium bromide absorption refrigeration system should be adjusted according to different environmental and occasion requirements.
Keywords：rankine cycledouble-effect lithium bromide absorption refrigerationwaste heat recoveryMATLAB modeling
Publication Date：2023-12-28
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：7( 104-110 )