平行流换热器管内换热的数值模拟研究
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- 英文论文题名：NUMERICAL SIMULATION INCESTIGATION OF HEAT TRANSFER PER FOFMANCE IN PARALLEL FLOW HEAT EXCHANGER TUBER
- 论文作者：周智勇 ; 刘斌 ; 邸倩倩 ; 申志远 ; 郭蘅
- 英文论文作者：Zhou Zhiyong ; Liu Bin ; Di Qianqian ; Shen Zhiyuan ; Guo Heng ; Tianjin Key Lab of Refrigeration Technology ; Tianjin University of Commerce
- 年：2014
- 作者机构：天津商业大学天津市制冷技术重点实验室;
- 论文关键词：平行流蒸发器 ; 数值模拟 ; COMSOL
- 英文论文关键词：Parallel flow evaporator ; simulation ; COMSOL
- 会议召开时间：2014-11-27
- 会议录名称：第九届全国食品冷藏链大会暨第六届全国冷冻冷藏产业创新发展年会论文集
- 语种：中文
- 分类号：TK172
- 学会代码：GDKL
- 会议名称：第九届全国食品冷藏链大会暨第六届全国冷冻冷藏产业创新发展年会
- 会议地点：中国广东广州
- 主办单位：中国制冷学会、国内贸易工程设计研究院
- 学会名称：广东省科学技术协会科技交流部
- 页数：6
- 文件大小：1264k
- 原文格式：O
- 会议级别：全国
摘要
平行流蒸发器由于其良好的换热性能而广受关注,但目前用在低温下的平行流蒸发器较少,且流场温度均匀性较差。本文采用COMSOL中的广义传热模型和不可压缩N-S方程对其二维模型进行模拟,研究了在相同R134a制冷剂充注量下,8根与10根管平行流蒸发器在孔径大小不变时,调整进口制冷剂流量和管间距后温度场的变化情况;研究了在模拟工况与实验工况一致的情况下,平行流蒸发器降温速率的差异;为改善管内流量的均匀,优化换热器的传热性能提供了参数依据。
Parallel flow evaporator enjoys great popularity with its favorable heat exchange properties,but it's used in low temperature is less and flow temperature uniformity is poor.The thesis simulates a two-dimensional model by applying the generalized heat exchange mould and incompressible Navier-Stokes equations in COMSOL.Under the same R134 a refrigerant charge amount,when 8 and 10 parallel flow evaporators remains the same size,changes of temperature fields after regulation imported refrigerant flow rates and inter-tubular distances have been studied in this dissertation;Studied in simulated conditions consistent with the experimental condition,the different rate of parallel flow evaporator cooling;In order to improve the uniform rate of the flow,optimize of heat transfer performance of heat exchanger providing the foundation for parameters.
Parallel flow evaporator enjoys great popularity with its favorable heat exchange properties,but it's used in low temperature is less and flow temperature uniformity is poor.The thesis simulates a two-dimensional model by applying the generalized heat exchange mould and incompressible Navier-Stokes equations in COMSOL.Under the same R134 a refrigerant charge amount,when 8 and 10 parallel flow evaporators remains the same size,changes of temperature fields after regulation imported refrigerant flow rates and inter-tubular distances have been studied in this dissertation;Studied in simulated conditions consistent with the experimental condition,the different rate of parallel flow evaporator cooling;In order to improve the uniform rate of the flow,optimize of heat transfer performance of heat exchanger providing the foundation for parameters.
引文
[1]P.Yuan,GB Jiang,Y.L.He,X.L.Yi,W.Q.Tao.Experimental study on the performance of a novel structure for two-phase flow distribution in parallel vertical channels.International Journal of Multiphase Flow.2013,53:65-74.
[2]P.Yuan,GB.Jiang.Experimental study on the performance of a novel structure for two-phase flow distribution in parallel vertical channels.International Journal of Multiphase Flow.2013,53:65-74.
[3]刘巍,朱春玲.内部结构对微通道平行流蒸发器性能的影响[J].南京航空航天大学学报.2012,44(6):893-897.
[4]邓敏锋,廖胜明,赵凤娇,李英玉.多元平行流蒸发器数值模拟与性能分析.建筑热能通风空调.2007,26(2).
[5]Chiou,J.P.The Effect of the Flow Nonuninformity in the Sizing of the Engine Radiator.ASE Paper 800035,Feb.1980,222-230.
[6]周森泉,过增元,胡桅林,李志信.来流温度速度不均匀时换热器效能的分析[J].工程热物理学报,1994,15(4):403—407.
[7]鲁红亮,陶红歌,胡云鹏等.平行流换热器中热流体分布均匀性的研究进展[J].制冷学报.2010.31(6):39-45
[8]张鸣远,景思睿,李国君.高等工程流体力学[M].西安:西安交通大学出版社,2006.
[9]楼江燕,楼华山.平行流蒸发器制冷剂测得换热性能研究[J].广西工学学院学报.2011,22(3):64-66.
[2]P.Yuan,GB.Jiang.Experimental study on the performance of a novel structure for two-phase flow distribution in parallel vertical channels.International Journal of Multiphase Flow.2013,53:65-74.
[3]刘巍,朱春玲.内部结构对微通道平行流蒸发器性能的影响[J].南京航空航天大学学报.2012,44(6):893-897.
[4]邓敏锋,廖胜明,赵凤娇,李英玉.多元平行流蒸发器数值模拟与性能分析.建筑热能通风空调.2007,26(2).
[5]Chiou,J.P.The Effect of the Flow Nonuninformity in the Sizing of the Engine Radiator.ASE Paper 800035,Feb.1980,222-230.
[6]周森泉,过增元,胡桅林,李志信.来流温度速度不均匀时换热器效能的分析[J].工程热物理学报,1994,15(4):403—407.
[7]鲁红亮,陶红歌,胡云鹏等.平行流换热器中热流体分布均匀性的研究进展[J].制冷学报.2010.31(6):39-45
[8]张鸣远,景思睿,李国君.高等工程流体力学[M].西安:西安交通大学出版社,2006.
[9]楼江燕,楼华山.平行流蒸发器制冷剂测得换热性能研究[J].广西工学学院学报.2011,22(3):64-66.