塑料温室空调-风袋系统通风过程数值模拟与分析  

Numerical simulation and analysis of the ventilation process of a plastic greenhouse air bag system

作　　者：周超帆 宗望远[1] 杨方[1] 谭峰 ZHOU Chaofan;ZONG Wangyuan;YAN Fang;TAN Feng(College of Engineering,Huazhong Agricultural University,Wuhan 430070,China;Shiyan Changxin Mush-room Industry Development Co.Ltd.,Shiyan 442500,China)

机构地区：[1]华中农业大学工学院,湖北武汉430070 [2]十堰市昌欣香菇产业发展有限公司,湖北十堰442500

出　　处：《甘肃农业大学学报》2023年第4期269-278,共10页Journal of Gansu Agricultural University

基　　金：湖北省重点研发计划项目(2020BBA040)。

摘　　要：【目的】验证塑料温室空调-风袋系统的降温、除湿性能,分析空调系统开启后温室内温湿度均一性水平。【方法】以湖北省十堰地区的塑料温室为研究对象,在现场实测的基础上结合已有的理论模型,建立了空温室和食用菌温室两种瞬态计算流体力学仿真模型,对空调-风袋系统开启后温室内温度和水蒸气的分布进行研究。【结果】模型经实测验证,模拟值和实测值的相对误差在12.5%以内,归一化均方根差值小于0.011。模拟结果表明,空温室平均温度可在5 min内由26℃降至22℃,食用菌温室平均温度在50 min内由26℃降至24℃以下,并保持稳定;两种温室温度的不均匀系数平均为0.0062和0.0073,水蒸气质量分数的不均匀系数平均为0.0087和0.0102。【结论】空调-风袋系统可以满足食用菌初秋时节养菌阶段的温度要求,且温室内温湿度均一性好;模拟结果可为传感器布局提供参考依据。【Objective】To verify the cooling and dehumidification performance of the plastic greenhouse air bag system,the uniformity of temperature and humidity in the greenhouse is analyzed after the air condi⁃tioning system is switched on.【Method】Taking the plastic greenhouse in Shiyan area of Hubei Province as the research object,based on the field measurement combined with the existing theoretical models,two tran⁃sient computational fluid dynamics simulation models of the empty greenhouse and the edible mushroom greenhouse were established,and the air conditioning/air bag system was opened.The distribution of tem⁃perature and water vapor in the post-greenhouse was studied.【Result】The model is verified by actual mea⁃surement,and the relative error between the simulated value and the simulated value is within 12.5%,and the normalized root mean square difference is less than 0.011.The simulation results show that the average temperature of the empty greenhouse can be reduced from 26℃to 22℃within 5 minutes,and the average temperature of the edible mushroom greenhouse can be reduced from 26℃to below 24℃within 50 minutes and remain stable;the average non-uniformity coefficients of the two greenhouse temperatures are 0.0062 and 0.0073,and the average non-uniformity coefficients of the water vapor mass fraction are 0.0087 and 0.0102.【Conclusion】The air-conditioning air-bag system can meet the temperature requirements of ed⁃ible mushrooms during the early autumn season and has good temperature and humidity uniformity in the greenhouse.At the same time,the simulation results also provide a reference basis for the layout of the sen⁃sors.

关 键 词：塑料温室 空调-风袋系统 性能 计算流体力学 

分 类 号：S625.51[农业科学—园艺学]