摘要
基于EES软件,利用分布参数法建立蒸发冷凝器仿真计算模型,并实验验证模型的准确性,选取R236fa为工质,计算分析不同管长、管径、微肋等结构参数变化对蒸发冷凝器换热性能的影响。研究表明：蒸发冷凝器的结构参数对其换热性能影响较大,在文中的研究工况下,长度为7~9m,内管外径为9~11mm,外管内径为30~36mm时,蒸发冷凝器换热效果最优。另外,微肋管的齿高、螺旋角、齿顶角变化也会影响蒸发冷凝器的换热性能,换热量随着肋高和螺旋角的增大而增大,随着齿顶角的增大而减小,本研究可为下一步蒸发冷凝器的优化设计提供参考和理论依据。
In this paper the evaporative-condenser performance analysis model was established based on the distributed parameter method and verified with experimental test data. R236 fa was selectedas refrigerant. The influence of structure parameters such as different length,inner and outside pipe diameter,tooth depth,spiral angle and apex angle on the heat exchange performance was analysed. Research shows that the heat transfer performance is influenced by the changes of structure parameters. The heat transfer of evaporative-condenser can be achieve optimal effect as the length of the pipe is from 7m to 9m,inner tube diameter is between 9mm and 11 mm,outside tube diameter is between 30 mm and 36 mm. Meanwhile,the heat transfer performance is influenced by the changes of tooth depth,spiral angle and tooth apex angle of slight ribbed tube. The heat transfer increases with tooth depth and spiral angle increase,and decreases with tooth apex angle increase. This paper can provide the reference and theoretical basis for evaporative-condenser optimized design.
出处
《低温与超导》
CAS
北大核心
2015年第12期67-72,共6页
Cryogenics and Superconductivity
基金
国家自然科学基金(51306214)
河南省高校科技创新人才计划(14HASTIT003)
河南省科技攻关项目(142102210286
142106000135)
河南省供热空调开放实验室(2013HAC202)项目
关键词
蒸发冷凝器
仿真
结构参数
优化
Evaporative-condenser
Solar assisted refrigeration system
Simulation
Experimental
