Research on airflow organization characteristics of high-space logistics cold storage

GAO Xuebin; CHEN Ru; DENG Xingwang; WANG Qiang; ZHANG Zhenxing

doi:10.3969/j.issn.1004-7948.2025.12.002

Abstract：To address the issue of uniformity in velocity and temperature fields in high-space cold storage,a combination of numerical simulation and experimental verification is adopted to study the air flow organization characteristics of high-space cold storage under four different supply and return air modes,air distribution duct supply air and natural return air,vertical orifice plate return air through ordinary air supply,natural return air through unpowered air supply,and natural return air through low pressure difference air supply.The results show that under non-steady-state conditions,the absolute error between the test results of the average temperature at the measurement points in the warehouse and the simulation results is less than 0.2℃,verifying the reliability of the theoretical model.Under steady-state conditions,the velocity non-uniformity coefficients in the warehouse of the four different supply and return air methods in numerical simulation are 0.85,1.11,1.07 and 1.09,respectively.The air distribution duct supply air and natural return air method improves the uniformity of the velocity field by more than 15%compared with other supply methods.The temperature non-uniformity coefficients inside the warehouse under four different supply and return air methods are 0.76,0.63,0.18 and 0.59,respectively.The temperature uniformity of the natural return air without powered supply air is more than 60%higher than that of other supply air methods.Considering the temperature uniformity requirements for goods storage in cold storage,for high-space logistics cold storage,it is recommended to adopt the supply and return air method in sequence,unpowered supply air and natural return air,low-pressure difference supply air and natural return air,air distribution duct supply air and natural return air,and ordinary supply air and vertical orifice plate return air.