Abstract Humidity control, which is affected by the performance of humidifying device and structure of the container, is very important for delaying water loss of fresh products. Humidifying rate and humidity distribution uniformity in fresh-keeping container were investigated to evaluate the characteristic of humidity control by Computational Fluid Dynamics (CFD) models. A pressure gauge was adopted to measure the ventilation resistance of products, by which the inertial resistance and viscous resistance values were obtained. The results of humidity performance were evaluated by entropy method. The results showed that the number of ultrasonic atomizers and sensor location had a significant effect on the humidifying rate. The effects of spray height, deflector angle and products quantity on humidifying rate are not significant, but they showed significant difference in the humidity distribution uniformity on products. The results of this study provide a better understanding of humidity control, which will help for the environment control in a fresh-keeping container.

中文翻译：

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基于CFD模型的保鲜容器湿度控制特性分析

摘要 湿度控制受加湿装置性能和容器结构的影响，对于延缓新鲜产品的失水非常重要。通过计算流体动力学（CFD）模型研究了保鲜容器内的加湿速率和湿度分布均匀性，以评估湿度控制的特性。采用压力表测量产品的通风阻力，得到惯性阻力和粘滞阻力值。湿度性能的结果采用熵值法进行评价。结果表明，超声波雾化器的数量和传感器位置对加湿率有显着影响。喷雾高度、偏转角和产品数量对加湿率的影响不显着，但它们在产品的湿度分布均匀性上表现出显着差异。本研究的结果提供了对湿度控制的更好理解，这将有助于保鲜容器中的环境控制。