压缩式制冷循环R134a水合物蓄冷系统仿真研究  

Simulation Study on R134a Hydrate Cold Storage System of Compression Refrigeration Cycle

作　　者：郭郁 谢应明[1] 邹俊华 杨振 俞秀娟 GUO Yu;XIE Yingming;ZOU Junhua;YANG Zhen;YU Xiujuan(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093

出　　处：《制冷技术》2024年第5期21-27,共7页Chinese Journal of Refrigeration Technology

基　　金：国家自然科学基金(No.50806050)。

摘　　要：本文建立一种基于压缩式制冷循环的R134a水合物蓄冷实验台,研究反应釜内不同初始温度Ti和压力pi的水合物蓄冷性能,采用Matlab仿真方法分析了不同实验参数的影响。结果表明:降低Ti会缩短水合物生成的预冷时间,pi为150 kPa时,Ti为288.15 K的预冷时间比Ti为289.15 K的预冷时间降低了19.8 min;pi与水合物的生成温度以及蓄冷量成正比,Ti为293.15 K时,pi为150、200和250 kPa的蓄冷量为598.05、693.06和728.63 kJ,但是增长速率由15.9%下降到5.1%。改变环境温度由283.15 K增加至308.15 K,系统蓄冷平均速率下降7.8%;冷凝器风速的改变会影响蓄冷量与功耗比值,仿真发现环境温度为288.15、293.15、298.15和303.15 K时,最佳风速分别为2.75、3.00、3.25和3.50 m/s。A R134a hydrate cold storage test bench based on a compression refrigeration cycle is established to study the cold storage performance of hydrates with different initial temperatures(Ti)and pressures(pi)in the reactor.Matlab simulation method is used to analyze the influence of different experimental parameters.The results show that reducing Ti will shorten the precooling time of hydrate formation.When pi is 150 kPa,the precooling time of Ti at 288.15 K is 19.8 min lower than that at 289.15 K.pi is proportional to the formation temperature and cold storage capacity of hydrate.When Ti is 293.15 K,the cold storage capacity of pi at 150 kPa,200 kPa and 250 kPa is 598.05 kJ,693.06 kJ and 728.63 kJ,respectively,but the growth rate decreases from 15.9%to 5.1%.By changing the ambient temperature(Te)from 283.15 K to 308.15 K,the average rate of cold storage in the system decreases by 7.8%.The change of condenser wind speed will affect the ratio of cold storage capacity to power consumption.The simulation results show that when Te is 288.15 K,293.15 K,298.15 K and 303.15 K,the optimal wind speed is 2.75 m/s,3.00 m/s,3.25 m/s and 3.50 m/s,respectively.

关 键 词：R134a水合物 蓄冷系统 模型 优化 

分 类 号：TB611[一般工业技术—制冷工程] TK02[动力工程及工程热物理]