摘要
以某苹果气调贮藏技术研究中心的1#气调库为研究对象,采用k-ε紊流模型建立了苹果气调库内气体流动、传热与传质的三维数学求解模型。研究了冷风机送风速度、送风温度和加湿装置对库内湿环境的影响。结果表明：送风温度对库内相对湿度有显著的影响,随着送风温度的降低,库内相对湿度明显增大;增大送风速度,气调库湿度梯度变小,货物区内湿度变大;在没有任何加湿装置时,气体区的湿度梯度明显大于货物区,库内大部分区域相对湿度为85%~90%,达不到苹果气调贮藏适宜的湿环境。综合考虑苹果气调贮藏适宜的湿环境,对于该气调库,在送风温度273 K,送风速度为5 m/s,采用加湿装置对库内加湿时,可以明显改善其湿环境,这对降低苹果干耗损失有重要意义。
A three dimensional physical and mathematical model of flow,heat and mass transfer in atmosphere-controlled storage rooms inside the Apple Controlled Atmosphere（CA） Storage Technology Research Center No.1 was established in this paper using k-ε turbulence model. The effect of air cooler＇s supply air velocity,supply air temperature and humidifying device on the storage humidity was investigated. There was a significant impact of supply air temperature on the relative humidity（RH） of CA storage room,which notably increased with the decrease of supply air temperature. The humidity gradient decreased while the RH of cargo area increased if the supply air velocity increased. A higher humidity gradient was observed in the gas zone compared with that of the cargo area without any humidifying device. The RH of the gas zone was mostly around 85%~90% which was not suitable for Apple CA storage. It was suggested that the supply air temperature should be adjusted to 273 K and the supply air velocity was 5 m/s for apple CA storage. The humidifying device could improve the RH in storage room and reduced the weight loss.
出处
《食品与生物技术学报》
CAS
CSCD
北大核心
2015年第12期1278-1284,共7页
Journal of Food Science and Biotechnology
基金
国家"十二五"科技支撑计划项目(2008BAJ08B07-1)
关键词
气调贮藏
湿环境
呼吸速率
相对湿度
controlled atmosphere storage
storage humidity
respiration rate
relative humidity
