蛋鸡舍热湿环境参数全年逐时动态预测模型  

Hourly model for predicting year-round temperature and relative humidity of the environment in laying hen houses

作　　者：梁超 尹欢欢 李保明[1,2,3] 王朝元 Liang Chao;Yin Huanhuan;Li Baoming;Wang Chaoyuan(College of Water Resources and Civil Engineering,China Agricultural University,Beijing 100083,China;Key Laboratory of Agricultural Engineering in Structure and Environment,Ministry of Agriculture and Rural Affairs,Beijing 100083,China;Beijing Engineering Research Center on Animal Healthy Environment,Beijing 100083,China)

机构地区：[1]中国农业大学水利与土木工程学院,北京100083 [2]农业农村部设施农业工程重点实验室,北京100083 [3]北京市畜禽健康养殖环境工程技术研究中心,北京100083

出　　处：《农业工程学报》2021年第8期229-235,共7页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家重点研发计划(2017FYD0701602、2017YFE0122200);博士后创新人才支持计划(BX20180363);国家现代农业产业技术体系(CARS-40)。

摘　　要：准确预测蛋鸡舍内温度和相对湿度参数动态变化是精准调控舍内热湿环境的重要条件。然而,现有预测模型通常未能考虑湿帘降温效率的变化及其对舍内热湿环境的影响。针对此问题,该研究通过分析湿帘降温效率变化规律和舍内热、湿平衡关系,构建了蛋鸡舍内温、湿度全年逐时动态变化预测模型,并进行了现场验证、案例展示和讨论分析。结果表明:1)蛋鸡舍内温、湿度模拟值与实测值变化趋势一致,舍内温度的平均预测误差为0.67℃,舍内相对湿度的平均预测误差为3.1%;2)因围护结构热惰性而引起蛋鸡舍内温度的延迟(夏季无延迟,冬季1 h)和衰减(夏季0.3℃,冬季1.02℃)均较小;3)若不考虑湿帘降温效率的动态变化,如设为80%定值时,模拟的温度误差为1.4℃,相对湿度误差为5.4%,模型预测精准度降低。该研究可为蛋鸡舍建筑设计与热湿环境调控提供理论指导,以提高蛋鸡生产性能。Laying hen house is an important part of livestock industries,particularly with an intensification scale of over 70%in China.Appropriate indoor temperature and relative humidity are also critical to the health of birds,production performance,and egg quality,further fully exploiting the excellent genetic features of modern laying hens.An automatic control system is,therefore,necessary to precisely predict the dynamic changes of indoor temperature and relative humidity for laying hen houses.An evaporative cooling pad system is the most popular used to increase the accuracy of the prediction model in laying hen houses in summer.However,most currently-used prediction models usually fail to consider the cooling variation of the evaporative cooling pad system.Particularly,it is also lacking to consider the humidified impact on the indoor temperature and relative humidity in laying hen houses.In this study,a novel hourly model was created to predict the annual indoor temperature and relative humidity,as well as its variation in laying hen houses.A mathematical model of cooling efficiency was also adopted to consider the quantitative influence of the evaporative cooling pad system on the indoor thermal and humid environment.A field experiment was then conducted to verify the model in Handan,Hebei Province of China in July 2019.Twenty-six points of indoor temperature and relative humidity were set for the field measurement.A hot-wire anemometer was utilized to monitor the airflow rate of exhaust fans.Meanwhile,an outdoor meteorological station was installed on the roof to continuously record the climatic parameters.Moreover,two cases were carried out in Wuhan City and Harbin City of China to evaluate the performance of the prediction model,thereby analyzing the influence of different climate conditions on the indoor environment of laying hen houses.Finally,the prediction model was used to clarify the difference of heat transfer in the steady and dynamic state for the building envelope on the indoor thermal and humid envir

关 键 词：温度 湿度 蛋鸡舍 热湿环境 湿帘 降温效率 围护结构 

分 类 号：S26[农业科学—农业水土工程]