临界喷嘴式分流器改善冷库用翅片蒸发器性能的实验研究
|
摘要
对采用临界喷嘴式分流器的冷库用翅片蒸发器性能进行实验研究,在0、-4、-8、-12、-16、-18及-20℃七种不同环境工况下进行传热性能测试,并将测试结果与采用气液分离式分流器、CAL分流器和文丘里式分流器进行对比分析。研究结果表明:库温为0℃时,对应的翅片式蒸发器的制冷量和传热系数分别为8.5 kW和37.9 W/(m~2·℃),相比气液分离式分流器、德国CAL分流器、文丘里分流器其对应冷风机的制冷量分别提高了8.1%、17.4%和21.7%,传热系数提高了4.5%、13.9%和18.6%。库温为-18℃时,对应的翅片式蒸发器的制冷量和传热系数分别为5.5 kW和30.9 W/(m~2·℃),其对应的蒸发器的制冷量分别提高了7.2%、14.3%和18.7%。库温为-18℃时,对应的传热系数分别提高了0.9%、10.1%和13.2%。实验结论为有效提高翅片蒸发器性能提供了一种解决方案。
The Experiments were carried out on the performance of the finned-tubed evaporator with the critical nozzle refrigerant distributor. The evaporator was tested at 7 different conditions, which were 0,-4,-8,-12,-16,-20, and -18 ℃. Then, the results were compared with CAL refrigerant distributor and Venturi refrigerant distributor. The research results show that when the temperature is 0 ℃, the cooling capacity of the evaporator is 8.5 kW, the heat transfer coefficient is 37.9 W/(m~2·℃), compared to the gas-liquid separation type diverter, Germany CAL shunt, cooling capacity the corresponding Venturi shunt evaporator are increased by 8.1%, 17.4%, and 21.7%, the heat transfer coefficient is increased by 4.5%, 13.9%, 18.7% and 0.9%, 10.1%, 13.2%. when the temperature were 18 ℃, the cooling capacity of the evaporator is 5.5 kW, the heat transfer coefficient is 30.9 W/(m~2·℃), The refrigerating capacity of the corresponding evaporator are increased by 7.2%, 14.3%, and 18.7%, the heat transfer coefficient is increased by 0.9%, 10.1%, 13.2%. The experimental results provide a solution for effectively improving the performance of finned-tubed evaporators.
The Experiments were carried out on the performance of the finned-tubed evaporator with the critical nozzle refrigerant distributor. The evaporator was tested at 7 different conditions, which were 0,-4,-8,-12,-16,-20, and -18 ℃. Then, the results were compared with CAL refrigerant distributor and Venturi refrigerant distributor. The research results show that when the temperature is 0 ℃, the cooling capacity of the evaporator is 8.5 kW, the heat transfer coefficient is 37.9 W/(m~2·℃), compared to the gas-liquid separation type diverter, Germany CAL shunt, cooling capacity the corresponding Venturi shunt evaporator are increased by 8.1%, 17.4%, and 21.7%, the heat transfer coefficient is increased by 4.5%, 13.9%, 18.7% and 0.9%, 10.1%, 13.2%. when the temperature were 18 ℃, the cooling capacity of the evaporator is 5.5 kW, the heat transfer coefficient is 30.9 W/(m~2·℃), The refrigerating capacity of the corresponding evaporator are increased by 7.2%, 14.3%, and 18.7%, the heat transfer coefficient is increased by 0.9%, 10.1%, 13.2%. The experimental results provide a solution for effectively improving the performance of finned-tubed evaporators.
引文
[1] 韩清,张驰,徐博,等.制冷剂分液器分配特性的实验研究 [J].制冷学报,2014,35(3):1-7.HAN Qing,ZHANG Chi,XU Bo,et al.Experimental study on the distribution characteristics of refrigerant liquid separator [J].Journal of Refrigeration,2014,35(3):1-7.(in Chinese)
[2] 姬卫川.蒸发器用分流器的理论分析与实验研究 [D].天津:天津商业大学,2016.JI Wei-chuan.Theoretical Analysis and Experimental Study of Diverter for Evaporator [D].Tianjin:Tianjin University of Commerce,2016.(in Chinese)
[3] ZHANG B,ZHANG X,WANG D,et al.Equal quality distribution of gas-liquid two-phase flow by partial separation method [J].International Journal of Multiphase Flow,2013,57(3):66-77.
[4] KABEEL A E,BASSUONI M M,ABDELGAIED M.Experimental study of a novel integrated system of indirect evaporative cooler with internal baffles and evaporative condenser [J].Energy Conversion & Management,2017,138:518-525.
[5] 高晶丹,丁国良,胡海涛,等.不同结构分流器的分流性能比较 [J].制冷技术,2013,33(3):24-26,30.GAO Jing-dan,DING Guo-liang,HU Hai-tao,et al.The performance of different structure technology,shunt shunt [J].Refrigeration,2013,33(3):24-26,30.(in Chinese)
[6] ZHANG Z,MEHENDALE S,TIAN J J,et al.Experimental investigation of distributor configuration on flow maldistribution in plate-fin heat exchangers [J].Applied Thermal Engineering,2015,85:111-123.
[7] YUAN P,JIANG G B,HE Y L,et al.Performance simulation of a two-phase flow distributor for plate-fin heat exchanger [J].Applied Thermal Engineering,2016,99:1236-1245.
[8] 梁法春,杨桂云,王金龙,等.基于临界分流理论的气液两相流均匀分配器 [J].化工学报,2014,65(10):3798-3804.LIANG Fa-chun,YANG Gui-yun,WANG Jin-long,et al.Gas-liquid two-phase flow uniform distributor based on critical split flow theory [J].Journal CIESC,2014,65(10):3798-3804.(in Chinese)
[9] AMINUDDIN M,ZUBAIR S M.Analytical solutions to counter-flow heat exchanger subjected to external heat flux and axial conduction [J].International Journal of Refrigeration,2016,74:22-37.
[10] 刘亚哲,臧润清.冷冻冷藏装置冷风机性能实验研究 [J].制冷学报,2014,35(5):61-65,82.LIU Ya-zhe,ZANG Run-qing.Experimental study on performance of air cooler for refrigeration and refrigeration equipment [J].Journal of Refrigeration,2014,35(5):61-65,82.(in Chinese)
[11] 臧润清,刘建勋,袁波,等.制冷系统液体冷媒融霜与电热融的对比研究 [J].热科学与技术,2015,14(1):40-44.ZANG Run-qing,LIU Jian-xun,YUAN Bo,et al.Comparison study of liquid refrigerant defrosting and electric heating defrosting in refrigeration system [J].Journal of Thermal Science and Technology,2015,14(1):40-44.(in Chinese)
[2] 姬卫川.蒸发器用分流器的理论分析与实验研究 [D].天津:天津商业大学,2016.JI Wei-chuan.Theoretical Analysis and Experimental Study of Diverter for Evaporator [D].Tianjin:Tianjin University of Commerce,2016.(in Chinese)
[3] ZHANG B,ZHANG X,WANG D,et al.Equal quality distribution of gas-liquid two-phase flow by partial separation method [J].International Journal of Multiphase Flow,2013,57(3):66-77.
[4] KABEEL A E,BASSUONI M M,ABDELGAIED M.Experimental study of a novel integrated system of indirect evaporative cooler with internal baffles and evaporative condenser [J].Energy Conversion & Management,2017,138:518-525.
[5] 高晶丹,丁国良,胡海涛,等.不同结构分流器的分流性能比较 [J].制冷技术,2013,33(3):24-26,30.GAO Jing-dan,DING Guo-liang,HU Hai-tao,et al.The performance of different structure technology,shunt shunt [J].Refrigeration,2013,33(3):24-26,30.(in Chinese)
[6] ZHANG Z,MEHENDALE S,TIAN J J,et al.Experimental investigation of distributor configuration on flow maldistribution in plate-fin heat exchangers [J].Applied Thermal Engineering,2015,85:111-123.
[7] YUAN P,JIANG G B,HE Y L,et al.Performance simulation of a two-phase flow distributor for plate-fin heat exchanger [J].Applied Thermal Engineering,2016,99:1236-1245.
[8] 梁法春,杨桂云,王金龙,等.基于临界分流理论的气液两相流均匀分配器 [J].化工学报,2014,65(10):3798-3804.LIANG Fa-chun,YANG Gui-yun,WANG Jin-long,et al.Gas-liquid two-phase flow uniform distributor based on critical split flow theory [J].Journal CIESC,2014,65(10):3798-3804.(in Chinese)
[9] AMINUDDIN M,ZUBAIR S M.Analytical solutions to counter-flow heat exchanger subjected to external heat flux and axial conduction [J].International Journal of Refrigeration,2016,74:22-37.
[10] 刘亚哲,臧润清.冷冻冷藏装置冷风机性能实验研究 [J].制冷学报,2014,35(5):61-65,82.LIU Ya-zhe,ZANG Run-qing.Experimental study on performance of air cooler for refrigeration and refrigeration equipment [J].Journal of Refrigeration,2014,35(5):61-65,82.(in Chinese)
[11] 臧润清,刘建勋,袁波,等.制冷系统液体冷媒融霜与电热融的对比研究 [J].热科学与技术,2015,14(1):40-44.ZANG Run-qing,LIU Jian-xun,YUAN Bo,et al.Comparison study of liquid refrigerant defrosting and electric heating defrosting in refrigeration system [J].Journal of Thermal Science and Technology,2015,14(1):40-44.(in Chinese)
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |