摘要
微型植物工厂环境的精准调控是实现其智能化控制的前提,但是已有的环境调控方式存在各栽培层温度差异较大的问题。本研究提出在微型植物工厂内部加入混风通道并采用风扇差速调节的方式,在计算流体动力学(Computational fluid dynamics,CFD)模拟仿真中设定目标温度为20℃,通过软件计算得到各栽培层的进风量分别为0.0189 m3/s、0.0236 m3/s、0.0281 m3/s。通过风速调节旋钮对进风量进行调节,通过各层风扇的差速调节来实现各栽培层的均匀调温。结果表明,在目标温度为20℃的条件下,控温设备持续工作60 min后,未使用混风通道和风速差速调节控温方式的传统微型植物工厂内第1、第2栽培层的温度为19℃,而第3栽培层的温度为24℃,温差达到了5℃;使用混风通道和风速差速调节控温方式下的微型植物工厂,各栽培层的温度均为20.5℃左右。由结果可知,在加入混风通道并且进行风扇差速调节后,各栽培层的环境温差得到了有效改善。
Achieving precise control of the mini-plant factory environment is the prerequisite for its intelligent control,but the previous environmental control methods have the problem of large temperature differences among cultivation layers in mini-plant factory.In this study,a mixed air channel was added in the micro plant factory,and the method of fan differential adjustment was adoped.In the computational fluid dynamics(CFD)simulation,the target temperature was set at 20℃,and the air intake volume of each cultivation layer was 0.0189 m3/s,0.0236 m3/s and 0.0281 m3/s.The air inlet volume was adjusted by the wind speed adjustment knob,and the uniform temperature adjustment of each cultivation layer was realized by the differential adjustment of the fans.The experimental results showed that when the target temperature was 20℃and the temperature-control equipment continued to work for 60 min,the temperature of the first,second and third cultivation layers was 19℃,19℃and 24℃in the micro-plant factory without the mixing channel and the wind speed differential adjustment,the temperature difference reached 5℃.The temperature of each cultivation layer was about 20.5℃under the temperature control mode of mixed air channel and wind speed differential adjustment.In conclusion,the environmental temperature difference of each cultivation layer has been effectively improved by using the mixed air channel and fan differential adjustment.
作者
高菊玲
刘永华
GAO Ju-ling;LIU Yong-hua(College of Mechanical and Electrical Engineering,Jiangsu Vocational College of Agriculture and Forestry,Jurong 212400,China;Jiangsu Modern Agricultural Equipment and Engineering Center,Jurong 212400,China)
出处
《江苏农业学报》
CSCD
北大核心
2020年第6期1543-1550,共8页
Jiangsu Journal of Agricultural Sciences
基金
2019年度江苏省高校优秀科技创新团队项目(设施园艺智能装备)。
关键词
微型植物工厂
CFD模拟仿真
风扇差速调节
混风通道
精准控制
mini-plant factory
computational fluid dynamics(CFD)simulation
fan differential adjustment
mixed air channel
precise control
作者简介
高菊玲(1981-),女,江苏泰兴人,硕士,副教授,研究方向为智能农业装备、农业物联网等。(E-mail)89059025@qq.com;通讯作者:刘永华,(E-mail)271681387@qq.com。
