摘要
为选取适用于计算一体式重力再循环冷风机传热系数的预测模型,在冷凝温度30.00℃,库温0.00、-5.00、-10.00、-15.00、-20.00、-25.00和-30.00℃工况下,依据实验结果计算得冷风机传热系数,与采用公式模拟计算获得的冷风机传热系数进行对比分析。结果表明:当库温低于-20.00℃时,可采用Chawla和流体横向流过肋片管束关联式,误差维持在8%以内;当库温高于-20.00℃时,可采用Shah和横向流过肋片管束关联式,误差在15%以内。
In order to select the predictive model for calculating the heat transfer coefficient of the integrated gravity recirculation air cooler,the heat transfer coefficient of the cooling fan was calculated according to the experimental results under the conditions of condensing temperature of 30.00℃,storage temperature of 0.00,-5.00,-10.00,-15.00,-20.00,-25.00 and-30.00℃respectively.And the obtained results were compared with the heat transfer coefficient of the air cooler obtained by the formula simulation calculation.It turns out that,when the cold storage temperature is below-20.00℃,the error between calculation result using J.Chawla&H.L formulas and experimental result is the minimum,remained within 8%.When the cold storage temperature is above-20.00℃,the error between calculation result using Shah&H.L formulas and experimental result is the minimum,the maximum error is remained within 15%.
作者
李延贺
臧润清
张秋玉
LI Yan-he;ZANG Run-qing;ZHANG Qiu-yu(Refrigeration Engineering Research Center of Ministry of Education,Tianjin University of Commerce,Tianjin 300134,China;Tianjin Key Laboratory of Refrigeration Technology,Tianjin University of Commerce,Tianjin 300134,China;Tianjin Refrigeration Engineering Technology Center,Tianjin University of Commerce,Tianjin,300134,China)
出处
《热科学与技术》
CAS
CSCD
北大核心
2019年第4期272-277,共6页
Journal of Thermal Science and Technology
关键词
重力再循环
冷风机
传热系数
模拟计算
gravity-recirculation
air cooler
heat transfer coefficient
simulation calculation
