堆垛方式及送风功率对冷库制冷效果的影响

The influence of stacking mode and air supply power on cooling effect of cold storage

目的:合理规划移动冷库内货物堆放方式,合理设计风机的送风功率,降低冷库能耗、提高经济效益。方法:以某冷库为研究对象,建立了冷库的三维物理模型和k-ε数学模型,采用Fluent软件对冷库内货物不同堆垛方式、不同送风功率下的温度场进行模拟。结果:在相同工况下,货物横置时平均库温为2.014℃,货物竖置时平均库温为2.006℃,均达到设计要求,且货框横置可以堆放162个,竖置可以堆放180个,竖置堆放可以让空间利用率最大化。在不同送风功率,运行15 min后,功率100%时平均库温为2.006℃;功率70%时平均库温为2.129℃;功率50%时平均库温为2.410℃,在3种不同风扇功率情况下冷库温度都达到了设计要求。实际选型功率过大,50%功率即可满足冷库满载运行的设计要求。结论:竖置的堆垛方式可以提高冷库的空间利用率,冷风机选型可以降低运行成本,提高经济效益。

Objective:Reasonable planning of the stacking of goods in the mobile cold storage and reasonable design of the air supply power of the fan,to reduce cold storage energy consumption and improve economic efficiency.Methods:A three-dimensional physical model and k-εmathematical model of a certain cold storage were established,and the temperature field inside the cold storage under different stacking methods of goods and different air supply power were simulated using Fluent software.Results:The research results showed that under the same working conditions,the average storage temperature of goods horizontally was 2.014℃,and the average storage temperature of goods vertically was 2.006℃,all meet the design requirements.The goods can be stacked horizontally to accommodate 162 and vertically to accommodate 180.Vertical stacking maximizes space utilization.At different airflow powers,after running for 15 minutes,the average cold storage temperature was 2.006℃at 100%power;The average cold storage temperature was 2.129℃at 70%power;The average cold storage temperature was 2.410℃at 50%power.The cold storage temperature met the design requirements for all three different fan power scenarios.The actual selected power was too high,and 50%power was sufficient to meet the design requirements for full-load operation of the cold storage.Conclusion:Choosing the vertical stacking method can improve the space utilization rate of cold storage.According to the simulation results,the selection of cooler type can reduce the energy consumption,reduce the operating cost and improve the economic benefit.