On the Improvement of Temperature Uniformity and Energy Efficiency by Auxiliary Ducts for Cooling Air in a Semi-Low Temperature Warehouse

被引:0
|
作者
Yun, Hyeon [1 ]
Kim, Joon Hyun [2 ]
Sung, Jaeyong [3 ]
机构
[1] Seoul Natl Univ Sci & Technol, Grad Sch, Seoul, South Korea
[2] Seoul Natl Univ Sci & Technol, NDT Ctr, Seoul, South Korea
[3] Seoul Natl Univ Sci & Technol, Dept Mech & Automot Engn, Seoul, South Korea
关键词
Semi-low Temperature Warehouse; Auxiliary Duct; Temperature Uniformity; Energy Efficiency; Porosity; CFD;
D O I
10.3795/KSME-B.2020.44.5.313
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
In this study, the improvement of temperature uniformity and energy efficiency was investigated by installing auxiliary ducts connected to a unit cooler in a low-temperature warehouse for long-term cold storage of cabbage. Based on the empirical data for the refrigeration system of a real storage, numerical simulations were conducted for the 3D unsteady flows inside the storage. Then, the distributions of temperature and velocity fields were compared according to the presence of the duct and the porosity of the duct slit. The results show that at the lower the porosity of the duct slit, the larger the space in the warehouse that remains in the proper temperature band owing to the heat balance during one cooling operation cycle. The auxiliary duct leads to the effective circulation of cooling flows; hence, the temperature uniformity improves and the consumption of cooling energy decreases when the duct is installed.
引用
收藏
页码:313 / 323
页数:11
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