冷库库门热压渗风的仿真研究  

Simulation Study on Hot Pressure Air Infiltration of Cold Storage Door

作　　者：刘海波 Liu Haibo(China Agricultural United Enterprise Operation Management Co.,Ltd.,Beijing 100000,China)

机构地区：[1]中农联企业运营管理有限公司,北京100000

出　　处：《科学技术创新》2022年第12期189-192,共4页Scientific and Technological Innovation

摘　　要：由于冷库内温度与室外温度存在较大差距,温差导致冷库内外空气密度不同,冷库内外空气存在热压差。当冷库大门开启时,室外高温高湿的空气将会流进冷库内,而冷库内的低温低湿的空气将会流到室外,冷库内外的空气将会产生强烈的热湿交换导致冷库内结霜、结露,影响冷库内的温度场,造成能源浪费。本文建立了热压作用下库门渗风CFD仿真模型,研究在冷库大门开启后,库内外空气流动方式及热空气进入冷库后对冷库温度场的影响。结果表明,冷库大门的开度大小和开启时间的长短对于冷热空气的运动轨迹影响不大,也不会影响初期中和面的形成;但是库门开度越小,热空气进入冷库的速度越小,库门开启时间越短,进入冷库的热湿空气越少,所引起的热湿负荷也就越小。Due to the large gap between the temperature in the cold storage and the outdoor temperature, the temperature difference leads to different air density inside and outside the cold storage, and there is a thermal pressure difference between the air inside and outside the cold storage. When the door of the cold storage is opened, the outdoor high-temperature and high humidity air will flow into the cold storage, and the low-temperature and low humidity air in the cold storage will flow outdoors. The air inside and outside the cold storage will produce strong heat and moisture exchange, resulting in frost and condensation in the cold storage, affecting the temperature field in the cold storage and causing energy waste. In this paper, the CFD simulation model of air infiltration at the cold storage door under thermal pressure is established to study the air flow mode inside and outside the cold storage after the cold storage door is opened and the influence of hot air entering the cold storage on the temperature field of the cold storage. The results show that the opening degree and opening time of the cold storage door have little effect on the trajectory of cold and hot air, and will not affect the formation of the initial neutralization surface;However, the smaller the opening of the warehouse door, the smaller the speed of hot air entering the cold storage, the shorter the opening time of the warehouse door, the less hot and humid air entering the cold storage, and the smaller the heat and humidity load caused.

关 键 词：冷库门 热压差 仿真模拟 中和面 热湿负荷 

分 类 号：TU111[建筑科学—建筑理论]