Energy efficiency optimization of waste heat recovery absorption refrigeration cycle system
In the realm of energy utilization in the 21st century,as fossil fuels are excessively exploited and resources become tight,people are continually seeking efficient,sustainable ways to harness ener-gy.In the face of such challenges,the recovery and efficient use of energy are particularly crucial.A-gainst this backdrop,a lithium bromide absorption refrigeration system has been proposed,which is spe-cifically designed for the recovery of low-grade energy and industrial waste heat.Firstly,a mathematical model was established by using the state equations of lithium bromide aqueous solution and water and steam to obtain the state parameters required for system thermodynamic calculations.Secondly,the opti-mization design was carried out with maximizing the performance area ratio as the objective function,clarifying the inherent relationship between various thermodynamic parameters and system performance under different working conditions,and calculating the thermodynamic parameters of each link in the system.Finally,through simulation analysis,key parameters in refrigeration systems were deeply ex-plored,with a focus on examining factors that may have a significant impact on system performance,in-cluding but not limited to absorbent concentration,circulating pump speed,heat exchanger efficiency,etc.The simulation results show that the designed system increases the coefficient of performance by 11.32%and reduces the total heat exchange area by 1.82%.The successful recovery of waste heat and the resultant refrigeration effect demonstrate a wide range of potential applications.
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