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肋片管表冷器湿工况动态数学模型及仿真 被引量:8

Dynamic mathematical model and simulation of fin-tube cooling coils on wet conditions
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摘要 利用分段集总参数法建立了肋片管表冷器在湿工况下的动态数学模型,将模型的微分方程转换为以表冷器各出口参数为状态变量的状态方程,对表冷器动态数学模型进行了直接求解,得到了肋片管表冷器各微元段水侧温度和空气侧温湿度随时间的变化关系,分析了表冷器在湿工况下达到稳态时各微元段的换热情况,以及流体入口温度和流速扰量对表冷器换热量的影响。结果表明,空气侧流速扰量对表冷器换热量的影响最大,随空气流速的增大,换热量增加的速度将减小。 Establishes a dynamic mathematical model of fin-tube cooling coil on wet conditions using the sub-lumped parameter method.Through converting the differential equation of the coil model into the state equation in which the state variables are the outlet parameters,the dynamic model is solved directly.Obtains the function expressions of water temperature,air temperature and humidity of all sub-elements of fin-tube cooling coil.Analyses the heat transfer of sub-elements on wet condition in the steady state,and the influences of the fluctuation of inlet temperature and air velocity on the heat transfer of cooling coil.The results show that the fluctuation of air velocity has the greatest impact on the heat transfer,and increasing rate of heat transfer will decrease with increase of air velocity.
出处 《暖通空调》 北大核心 2011年第7期128-133,共6页 Heating Ventilating & Air Conditioning
基金 国家自然科学基金资助项目(编号:51078053 51078067) 中央高校基本科研业务费专项资金资助项目(编号:DUT11ZD105) 教育部新世纪优秀人才支持计划基金资助项目
关键词 肋片管表冷器 湿工况 动态数学模型 换热量 fin-tube cooling coil wet condition dynamic mathematical model heat transfer
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参考文献4

  • 1Wang Gang. Deoupled moeling of chilled-water cooling coils[G]//ASHRAE Trans, 2007,113 (2): 102-113.
  • 2孟华,龙惟定,王盛卫,张恩泽.适于系统仿真的表冷器模型及其实验验证[J].暖通空调,2004,34(8):17-20. 被引量:11
  • 3Yao Ye, Lian Zhiwei, Hou ZhijiarL Thermal analysis of cooling coils based on a dynamic model[J]. Therm Eng, 2004,24(7): 1037-1050.
  • 4Morisot O, Marchio D, Stabat P. Simplified model for operation of chilled water cooling coils under nonnominal conditions [ J ]. HVAC&R Research, 2002, 8 (2):135-158.

二级参考文献4

  • 1ASHRAE. ASHRAE Equipment Guide. 1983
  • 2Stoecker W F. Proposed procedures for simulating the performance of components and systems for energy calculations. 2nd Edition. New York: McGraw-Hill,1971
  • 3Lebrun J, Ding X, Eppe J P, et al. Cooling coil models to be used in transient and/or wet regimes-theoretical analysis and experimental validation. In: Proceedings of System Simulation in Buildings '90, Liege, Belgium, 1990
  • 4Rohsenow W M. Handbook of Heat Transfer. 3rd Edition. New York: McGraw-Hill, 1998

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