小型制冷系统中吸气管-毛细管回热器特性实验研究
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摘要
由吸气管与毛细管热交换形成的回热器对小型制冷装置的制冷性能有着重要影响。目前,回热器主要有以下四种类型:毛细管外穿式、铝箔覆盖式、铜锡焊式、毛细管内穿式。结合理论分析,实验研究了制冷装置采用不同类型回热器时毛细管进出口温度、吸气管进出口温度、蒸发器温度以及压缩机吸排气温度对其工作性能的影响。结果表明,从换热性能上看,毛细管内穿式回热器与铜锡焊式回热器的性能基本相同,从制冷装置总体制冷性能上看,毛细管内穿式回热器优于铜锡焊式,且比毛细管外穿式及铝箔覆盖式回热器同等条件下单位容积制冷量提高17.4%,采用毛细管内穿式回热器有利于提高系统的制冷性能。
Heat regenerator formed by capillary and suction pipe has an important influence on the performance of small refrigeration equipment. At present,there are four main types of regenerator: capillary wear type,aluminum foil cover type,copper and tin welding type,capillary inside pipe type. Combining with theoretical analysis,the refrigeration performance of regenerator was experimentally studied by capillary inlet and outlet temperature,suction pipe inlet and outlet temperature,evaporator temperature and discharge temperature of compressor suction. The results show that,wear inside the capillary regenerator and copper tin welding type regenerator have the same performance in heat transfer performance. However,the refrigerating capacity per unit of swept volume of capillary inside pipe type regenerator was 17. 4% higher than that of capillary wear type and aluminum foil cover type regenerator under the same conditions. The performance of refrigerator can be improved by using capillary inside pipe type regenerator.
Heat regenerator formed by capillary and suction pipe has an important influence on the performance of small refrigeration equipment. At present,there are four main types of regenerator: capillary wear type,aluminum foil cover type,copper and tin welding type,capillary inside pipe type. Combining with theoretical analysis,the refrigeration performance of regenerator was experimentally studied by capillary inlet and outlet temperature,suction pipe inlet and outlet temperature,evaporator temperature and discharge temperature of compressor suction. The results show that,wear inside the capillary regenerator and copper tin welding type regenerator have the same performance in heat transfer performance. However,the refrigerating capacity per unit of swept volume of capillary inside pipe type regenerator was 17. 4% higher than that of capillary wear type and aluminum foil cover type regenerator under the same conditions. The performance of refrigerator can be improved by using capillary inside pipe type regenerator.
引文
[1]赵丹,丁国良,任滔.非绝热毛细管快速计算方法[J].制冷学报,2013,34(2):38-43.(Zhao Dan,Ding Guoliang,Ren Tao.Fast calculation method for modeling nonadiabatic capmary tube[J].Journal of Refrigeration,2013,34(2):38-43.)
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[9]陈燕燕,罗二仓,戴巍.影响回热器换热的各参数讨论[J].工程热物理学报,2007,28(4):688-690.(Chen Yanyan,Luo Ercang,Dai Wei.Heat transper characteristics of oscillating-flow regenerators[J].Journal of Engineering Thermophsics,2007,28(4):688-690.)
[10]夏宇栋,陈曦,马诗旻,等.基于格子波尔兹曼方法的回热器数值模拟[J].低温工程,2012(5):41-45.(Xia Yudong,Chen Xi,Ma Shimin,et al.Numerial simulation of cryocooler regenerator using Lattice Boltzmann Method(LBM)[J].Cryogenics,2012(5):41-45.)
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[12]陈曦,郭永飞,张华,等.回热式低温制冷机用回热器结构研究综述[J].制冷学报,2011,32(3):6-14.(Chen Xi,Guo Yongfei,Zhang Hua,et al.Review of Investigation on regenerator for regenerative cryocoolers[J].Journal of Refrigeration,2011,32(3):6-14.)
[13]Martins L S,Ordonez J C,Vargas J V C,et al.Thermodynamic optimization of a regenerator heat exchanger[J].Applied Thermal Engineering,2012,45/46:42-51.
[14]E Natarajan,K Pitchandi.Thermodynamic optimization of periodic regenerative heat exchanger[J].World Academy of Science,Engineering and Technology,2009,56:509-517.
[15]Hermes C J L,Melo C,Knabben F T.Algebraic solution of capillary tube flows.Part II:Capillary tube suction line heat exchangers[J].Applied Thermal Engineering,2010,30(6/7):770-775.
[16]Yang C,Bansal P K.Numerical investigation of capillary tube-suction line heat exchanger performance[J].Applied Thermal Engineering,2005,25(13):2014-2018.
[17]Madsen P K,Wang G.Numerical analysis of chocked refrigerant flow in capillary tubes[J].Applied Thermal Engineering,2004,24:851-863.
[18]Drees H,Zwicker A.制冷装置[M].徐家驹,译.北京:机械工业出版社,1988:55-56.
[2]孔祥敏,刘何清,王浩.小型空调装置毛细管长度计算方法研究[J].制冷,2013,32(1):1-6.(Kong Xiangmin,Liu Heqing,Wang Hao.Research on the calculation method of capillary length about small air conditioning equipment[J].Refrigeration,2013,32(1):1-6.)
[3]林朝光,陈则韶,胡芃,等.冰箱毛细管内流动特性的研究[J].流体机械,2000,28(10):42-46.(Lin Zhaoguang,Chen Zeshao,Hu Fan,et al.Research on flow characteristics of capillary in refrigerator[J].Fluid Machinery,2000,28(10):42-46.)
[4]胡修民,余晓明.风冷冷柜中毛细管特性的试验研究[J].低温与超导,2013,41(9):79-88.(Hu Xiumin,Yu Xiaoming.An experimental study on the application of capillary tube in the air-cooled freezer[J].Cryogenics and Superconductivity,2013,41(9):79-88.)
[5]王栋,李蒙,戚利利,等.二氧化碳制冷系统毛细管的设计及实验研究[J].化工学报,2011,62(10):2753-2757.(Wang Dong,Li Meng,Qi Lili,et al.Design and experimental study of capillary tube in transcritical carbon dioxide refrigeration system[J].CIESC Journal,2011,62(10):2753-2757.)
[6]刘益才,杨智辉,郭方中.冰箱回热毛细管计算模型[J].华中科技大学学报(自然科学版),2007,35(3):96-99.(Liu Yicai,Yang Zhihui,Guo Fangzhong.Calculation model for refrigerant capillary tubes in refrigerateors[J].Journal of Huazhong University of Science and Technology(Nature Science Edition),2007,35(3):96-99.)
[7]杨智辉,刘益才,刘振利,等.冰箱回热毛细管内部流动特性研究[J].真空与低温,2006,12(4):210-214.(Yang Zhihui,Liu Yicai,Liu Zhenli,et al.Research on flow characteristics of the refrigerator non-adiabatic capillary[J].Vacuum&Cryogenics,2006,12(4):210-214.)
[8]吴晓敏,B L Webb,王维城.回热器对制冷系统性能的影响[J].上海理工大学学报,2001,23(3):247-250.(Wu Xiaomin,B L Webb,Wang Weicheng.Effects of suction line heat exchanger on performance of refrigeration system[J].Journal of University of Shanghai for Science and Technology,2001,23(3):247-250.)
[9]陈燕燕,罗二仓,戴巍.影响回热器换热的各参数讨论[J].工程热物理学报,2007,28(4):688-690.(Chen Yanyan,Luo Ercang,Dai Wei.Heat transper characteristics of oscillating-flow regenerators[J].Journal of Engineering Thermophsics,2007,28(4):688-690.)
[10]夏宇栋,陈曦,马诗旻,等.基于格子波尔兹曼方法的回热器数值模拟[J].低温工程,2012(5):41-45.(Xia Yudong,Chen Xi,Ma Shimin,et al.Numerial simulation of cryocooler regenerator using Lattice Boltzmann Method(LBM)[J].Cryogenics,2012(5):41-45.)
[11]向立平,曹小林,席占利,等.回热器对制冷循环性能影响的研究[J].制冷与空调(四川),2005(4):38-42.(Xiang Liping,Cao Xiaolin,Xi Zhanli,et al.A theoretical investigation on the performance of refrigeration system with liquid-suctin heat exchargers[J].Refrigeration&Air Conditioning,2005(4):38-42.)
[12]陈曦,郭永飞,张华,等.回热式低温制冷机用回热器结构研究综述[J].制冷学报,2011,32(3):6-14.(Chen Xi,Guo Yongfei,Zhang Hua,et al.Review of Investigation on regenerator for regenerative cryocoolers[J].Journal of Refrigeration,2011,32(3):6-14.)
[13]Martins L S,Ordonez J C,Vargas J V C,et al.Thermodynamic optimization of a regenerator heat exchanger[J].Applied Thermal Engineering,2012,45/46:42-51.
[14]E Natarajan,K Pitchandi.Thermodynamic optimization of periodic regenerative heat exchanger[J].World Academy of Science,Engineering and Technology,2009,56:509-517.
[15]Hermes C J L,Melo C,Knabben F T.Algebraic solution of capillary tube flows.Part II:Capillary tube suction line heat exchangers[J].Applied Thermal Engineering,2010,30(6/7):770-775.
[16]Yang C,Bansal P K.Numerical investigation of capillary tube-suction line heat exchanger performance[J].Applied Thermal Engineering,2005,25(13):2014-2018.
[17]Madsen P K,Wang G.Numerical analysis of chocked refrigerant flow in capillary tubes[J].Applied Thermal Engineering,2004,24:851-863.
[18]Drees H,Zwicker A.制冷装置[M].徐家驹,译.北京:机械工业出版社,1988:55-56.