基于和声搜索-长短记忆的NH_(3)/CO_(2)复叠制冷循环的最佳参数预测  

Optimal Parameter Prediction of NH_(3)/CO_(2) Cascade Refrigeration Cycle Based on Harmony Search with Long and Short Term Memory

作　　者：吴兴应 蒯大秋 向夏楠 段姣姣 WU Xingying;KUAI Daqiu;XIANG Xianan;DUAN Jiaojiao(Institute of Municipal and Mapping Engineering,Hunan City University,Yiyang 413000,Hunan,China)

机构地区：[1]湖南城市学院市政与测绘工程学院,湖南益阳413000

出　　处：《制冷技术》2024年第5期35-40,共6页Chinese Journal of Refrigeration Technology

基　　金：湖南省教育厅科学研究项目(No.22C0514);湖南省自然科学省市联合基金(No.2021JJ50154)

摘　　要：为了研究NH_(3)/CO_(2)复叠制冷循环系统的性能系数COP与热力学参数间的关系,本文通过设定NH_(3)/CO_(2)复叠制冷循环系统的高温级冷凝温度、低温级蒸发温度,采用了和声搜索(HS)与长短记忆(LSTM)神经网络相结合进行极值寻优的方法,利用LSTM控制HS的搜索精度,收敛速度快,获得了最大COP时的最佳中间温度与最佳蒸发冷凝器的传热温差,在高温级冷凝温度为30℃不变,而低温级蒸发温度在-50~-25℃内变化时,最佳中间温度的寻优结果为-18.49~-9.15℃,而所获得的最佳蒸发冷凝器的传热温差为其寻优范围的最低值。In order to study the relationship between the coefficient of performance(COP)of NH_(3)/CO_(2) refrigeration cycle system and thermodynamic parameters,the high temperature condensation temperature and low temperature evaporation temperature of NH_(3)/CO_(2) refrigeration cycle system is set,and the combination of Harmony search(HS)and long and short term memory(LSTM)neural network is adopted to find the best parameters in this paper.The LSTM is used to control the search accuracy of HS,and the convergence speed is fast.The heat transfer temperature difference between the optimal intermediate temperature and the optimal evaporative condenser at the maximum COP is obtained.When the condensation temperature of the high temperature stage remains unchanged at 30℃,while the evaporation temperature of the low temperature stage varies from-50℃to-25℃,the optimization result of the optimal intermediate temperature is-18.49℃to-9.15℃,and the heat transfer temperature difference of the optimal evaporation condenser is the lowest value in the optimization range.

关 键 词：NH_(3)/CO_(2)复叠制冷 中间温度 极值寻优 和声搜索 长短记忆 

分 类 号：TB611[一般工业技术—制冷工程] TB612