余热回收型吸收式制冷循环系统的能效优化研究  

Energy efficiency optimization of waste heat recovery absorption refrigeration cycle system

作　　者：王新军 蔡艳平 李利[2] 高磊 WANG Xinjun;CAI Yanping;LI Li;GAO Lei(Rocket Force University of Engineering,Xi’an 710025,China;College of Electrical and Control Engineering,Xi’an University of Science and Technology,Xi’an 710054,China;10 th Institute of Telecommunication Science and Technology Co.,Ltd.,Xi’an 710086,China)

机构地区：[1]火箭军工程大学,陕西西安710025 [2]西安科技大学电气与控制工程学院,陕西西安710054 [3]电信科学技术第十研究所有限公司,陕西西安710086

出　　处：《西安科技大学学报》2024年第4期786-795,共10页Journal of Xi’an University of Science and Technology

基　　金：陕西省自然科学基础研究计划项目(2024JC-YBQN-0726)。

摘　　要：在21世纪的能源利用领域,随着化石燃料的过度开采和资源紧张,人们不断寻找着一种高效、可持续的能源利用方式。面对这样的挑战,能源的回收和高效利用显得尤为关键。基于此,提出一种溴化锂吸收式制冷系统,该系统专门用于回收低温能源和工业废热等余热回收。首先,通过使用溴化锂水溶液的状态方程以及水和蒸汽的状态方程,建立了数学模型,以获取系统热力计算所需的状态参数;其次,将最大化性能面积比作为目标函数进行优化设计,明确了不同工作条件下各个热力学参数与系统性能之间的内在联系,计算了系统中各环节热力参数;最后,通过仿真分析的方法,对制冷系统中的关键参数进行了深入探讨,重点考察了那些可能对系统性能产生显著影响的因素,包括但不限于吸收剂浓度、循环泵速和热交换器效率等。结果表明:所设计的系统将热力系数提高了11.32%,同时总换热面积下降了1.82%。该系统成功地回收了废热并实现了制冷效果,展示了广泛的应用前景。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 energy.In the face of such challenges,the recovery and efficient use of energy are particularly crucial.Against this backdrop,a lithium bromide absorption refrigeration system has been proposed,which is specifically 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 optimization 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 explored,with a focus on examining factors that may have a significant impact on system performance,including 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.

关 键 词：溴化锂 热力计算 目标函数 余热回收 制冷 

分 类 号：TB69[一般工业技术—制冷工程]