蒸发器内置开孔毛细管强化换热的特性研究  

Study on Enhanced Heat Transfer Characteristics of the Evaporator with Built-in Perforated Capillary

作　　者：刘创创 刘斌[1] 赵松松 刘泳杉 黎劲松 高磊[3] Liu Chuangchuang;Liu Bin;Zhao Songsong;Liu Yongshan;Li Jinsong;Gao Lei;无(Tianjin Key Laboratory of Refrigeration Technology,International Joint Research Center of Engineering Thermophysics and Engineering,Key Laboratory of Low Carbon Cold Chain for Agricultural Products,Ministry of Agriculture and Rural Affairs,Tianjin University of Commerce,Tianjin,300134;School of Ship,Ocean,Energy and Power Engineering,Wuhan University of Technology,Wuhan,430010;Key Laboratory of Efficient Utilization of Low and Medium Grade Energy,Ministry of Education,Tianjin University,Tianjin,300134)

机构地区：[1]天津商业大学天津市制冷技术重点实验室、工程热物理基础及工程国际联合研究中心、农业农村部农产品低碳冷链重点实验室,天津300134 [2]武汉理工大学船海与能源动力工程学院,武汉430070 [3]天津大学中低温热能高效利用教育部重点实验室,天津300134

出　　处：《制冷与空调（四川）》2023年第4期479-487,共9页Refrigeration and Air Conditioning

基　　金：中国博士后科学基金(编号:2022T150503、2021M702541);国家自然科学基金项目(编号:51906178)。

摘　　要：为进一步强化蒸发器换热效率,降低系统能耗,通过在蒸发管中内置开孔毛细管,基于微通道结构和射流冲击相结合的蒸发管,提出了一种利用制冷剂在蒸发管内进行喷射的新型制冷系统。开展了不同管径、不同孔径、不同孔间距毛细管影响蒸发管换热效果及制冷系统性能的试验研究。试验结果表明:在环境温度为16℃、制冷剂流量为180g/min时,采用喷孔孔径为0.6mm、毛细管管径为3.0mm、孔间距为10cm的开孔毛细管结构,蒸发管的换热效果最好,蒸发管表面温度最低,蒸发管整体壁面温度能更快达到稳定且分布更均匀,换热系数更大。To further strengthen the evaporator heat transfer efficiency and reduce the system energy consumption.This paper proposes a novel refrigeration system that utilizes the injection of refrigerant into an evaporator tube through an embedded perforated capillary based on microchannel structures and jet impingement.The experimental study investigates the effects of different diameters,pore sizes,and pore spacing of capillaries on the heat transfer performance of the evaporator tube and the refrigeration system.The experimental results show that at an ambient temperature of 16℃ and a refrigerant flow rate of 180 g/min,the best heat transfer performance was achieved with an embedded perforated capillary structure with a pore diameter of 0.6 mm,a capillary tube diameter of 3.0 mm,and a pore spacing of 10 cm in the evaporator tube.The surface temperature of the evaporator tube was the lowest,and its overall wall temperature could reach stability more quickly and have a more uniform distribution with a higher heat transfer coefficient.

关 键 词：协同角 蒸发管 内置开孔毛细管 射流冲击 换热效果 

分 类 号：TB657.5[一般工业技术—制冷工程] TB611