水体加热条件下育苗温室温湿度控制系统研究
发布时间：2019-05-22 17:24
【摘要】：为了提高漂浮育苗技术在冬季的使用能力,实施循环加热营养液的方式来保证苗体所需的最佳生长温度。这种增温措施导致大棚内空气湿度过高、温度不稳定。针对这一问题,本文通过分析水体加热条件下漂浮育苗温室的水分蒸发情况,构造了相应的湿度模型。采用了空气—空气热交换的方式对温室大棚进行保温除湿,并通过实验分析了通风量、大棚内外温差和大棚内外空气含湿量的差值对热交换效率的影响。结合湿度模型和影响热交换效率的环境因素对漂浮育苗温室大棚的除湿进行指导。针对单栋漂浮育苗温室的温湿度调控,研制了保温除湿热交换换气机以及基于STM32单片机的换气机控制系统。其中换气机控制系统包含了温湿度传感器、单片机、风机和水阀控制装置及人机交互模块,可以实时显示大棚内的环境参数和换气机工作状态,并可根据设定的环境参数,通过对风机和水阀的组合控制对大棚内的温湿度进行自动调控。研制了基于GPRS的远程监控系统,系统能与热交换换气机控制系统进行远程数据通信,实现对温室大棚环境的实时远程监控。将研制的温湿度控制系统应用于温室育苗生产实践,试验数据表明,系统具有良好的去湿效果,试验大棚平均湿度较对照降低6.7%,平均能量回收效率为59.35%,大棚内苗体茎高增加0.04cm、茎围增加0.06cm。
[Abstract]:In order to improve the ability of floating seedling raising technology in winter, the way of circulating heating nutrient solution was carried out to ensure the optimum growth temperature of seedling. This kind of temperature increase measure causes the air humidity in the greenhouse to be too high, the temperature is unstable. In order to solve this problem, the corresponding humidity model was constructed by analyzing the water evaporation of floating seedling greenhouse under the condition of water heating. The heat preservation and dehumidification of greenhouse was carried out by means of air-air heat exchange, and the effects of ventilation volume, temperature difference inside and outside the greenhouse and the difference of air moisture content inside and outside the greenhouse on the heat exchange efficiency were analyzed through experiments. Combined with humidity model and environmental factors affecting heat exchange efficiency, the dehumidification of floating seedling greenhouse was guided. Aiming at the temperature and humidity control of single floating seedling greenhouse, the heat exchange engine of heat preservation and dehumidification and heat exchange and the control system of ventilator based on STM32 single chip microcomputer are developed. The ventilator control system includes temperature and humidity sensor, single chip microcomputer, fan and water valve control device and human-computer interaction module, which can display the environmental parameters and the working state of the ventilator in real time, and according to the set environmental parameters, The temperature and humidity in the greenhouse are automatically controlled by the combination control of fan and water valve. A remote monitoring system based on GPRS is developed. The system can communicate with the heat exchange engine control system remotely and realize the real-time remote monitoring of greenhouse environment. The temperature and humidity control system has been applied to the production practice of greenhouse seedling raising. The experimental data show that the system has a good dehumidification effect, the average humidity of the experimental greenhouse is 6.7% lower than that of the control, and the average energy recovery efficiency is 59.35%. In the greenhouse, the height of seedling stem increased by 0.04cm, and the stem circumference increased by 0.06cm.
【学位授予单位】：湖南农业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：S31;S126
[Abstract]:In order to improve the ability of floating seedling raising technology in winter, the way of circulating heating nutrient solution was carried out to ensure the optimum growth temperature of seedling. This kind of temperature increase measure causes the air humidity in the greenhouse to be too high, the temperature is unstable. In order to solve this problem, the corresponding humidity model was constructed by analyzing the water evaporation of floating seedling greenhouse under the condition of water heating. The heat preservation and dehumidification of greenhouse was carried out by means of air-air heat exchange, and the effects of ventilation volume, temperature difference inside and outside the greenhouse and the difference of air moisture content inside and outside the greenhouse on the heat exchange efficiency were analyzed through experiments. Combined with humidity model and environmental factors affecting heat exchange efficiency, the dehumidification of floating seedling greenhouse was guided. Aiming at the temperature and humidity control of single floating seedling greenhouse, the heat exchange engine of heat preservation and dehumidification and heat exchange and the control system of ventilator based on STM32 single chip microcomputer are developed. The ventilator control system includes temperature and humidity sensor, single chip microcomputer, fan and water valve control device and human-computer interaction module, which can display the environmental parameters and the working state of the ventilator in real time, and according to the set environmental parameters, The temperature and humidity in the greenhouse are automatically controlled by the combination control of fan and water valve. A remote monitoring system based on GPRS is developed. The system can communicate with the heat exchange engine control system remotely and realize the real-time remote monitoring of greenhouse environment. The temperature and humidity control system has been applied to the production practice of greenhouse seedling raising. The experimental data show that the system has a good dehumidification effect, the average humidity of the experimental greenhouse is 6.7% lower than that of the control, and the average energy recovery efficiency is 59.35%. In the greenhouse, the height of seedling stem increased by 0.04cm, and the stem circumference increased by 0.06cm.
【学位授予单位】：湖南农业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：S31;S126
【参考文献】
相关期刊论文 前10条
1 蒋笃忠;聂新柏;成R退，
本文编号：2483105
本文链接：https://www.wllwen.com/kejilunwen/nykj/2483105.html
