摘要
[目的]考查在温室中采用不同水压下喷雾降温的效果。[方法]以可编程逻辑控制器、变频器、水泵、触控系统和多路传感器为硬件平台，设计了温室变频雾化装置。试验探索5个不同喷雾频率下，系统的实际降温效果，并在此基础上提出了适合试验温室的喷雾压力。[结果]喷雾压力低于110kPa（对应喷雾频率为31Hz时，降温幅度随着压力的增加而升高，但当喷雾压力大于110kPa时，随着压力的增加降温效果趋于平滑，而温室内湿度随着压力的增加不断增加，喷头的流量随着压力的升高而近似线性增加。[结论]综合考虑温度和湿度2个因素，该试验温室的最适应喷雾为压力为100～120kPa。
[ Objective ] To investigate spray cooling effect under different spray frequency in greenhouse. [ Method ] A frequency conversion at- omization device was designed based on PLC ,frequency converter,water pump,touch system and multi-channel sensors to study the spray cooling effect. The experiment explored the actual cooling effect of the system under 5 different spray frequency,and proposed the best pressure for the ex- periment greenhouse. [ Result] It was found that when the spray pressure is lower than 110 kPa （ frequency of 31 Hz） ,the cooling amplitude in- creased with the pressure increasing. When the spray pressure was higher than 110 kPa,the cooling effect tended to be smooth with pressure in- creases while humidity increases with pressure. Also,water flow increased approximately linear with pressure. [Conclusion] Considered tempera- ture and humidity,the best spray pressure for this greenhouse was 100 to 120 kPa.
出处
《安徽农业科学》
CAS
2015年第24期311-314,共4页
Journal of Anhui Agricultural Sciences
基金
国家自然科学基金项目(61273227)
江苏省科技支撑计划(BE2013395)
关键词
温室
喷雾降温
PLC
变频器
Greenhouse
Spray cooling
PLC
Frequency converter
