【摘要】：為了提高漂浮育苗技術(shù)在冬季的使用能力,實(shí)施循環(huán)加熱營(yíng)養(yǎng)液的方式來(lái)保證苗體所需的最佳生長(zhǎng)溫度。這種增溫措施導(dǎo)致大棚內(nèi)空氣濕度過(guò)高、溫度不穩(wěn)定。針對(duì)這一問(wèn)題,本文通過(guò)分析水體加熱條件下漂浮育苗溫室的水分蒸發(fā)情況,構(gòu)造了相應(yīng)的濕度模型。采用了空氣—空氣熱交換的方式對(duì)溫室大棚進(jìn)行保溫除濕,并通過(guò)實(shí)驗(yàn)分析了通風(fēng)量、大棚內(nèi)外溫差和大棚內(nèi)外空氣含濕量的差值對(duì)熱交換效率的影響。結(jié)合濕度模型和影響熱交換效率的環(huán)境因素對(duì)漂浮育苗溫室大棚的除濕進(jìn)行指導(dǎo)。針對(duì)單棟漂浮育苗溫室的溫濕度調(diào)控,研制了保溫除濕熱交換換氣機(jī)以及基于STM32單片機(jī)的換氣機(jī)控制系統(tǒng)。其中換氣機(jī)控制系統(tǒng)包含了溫濕度傳感器、單片機(jī)、風(fēng)機(jī)和水閥控制裝置及人機(jī)交互模塊,可以實(shí)時(shí)顯示大棚內(nèi)的環(huán)境參數(shù)和換氣機(jī)工作狀態(tài),并可根據(jù)設(shè)定的環(huán)境參數(shù),通過(guò)對(duì)風(fēng)機(jī)和水閥的組合控制對(duì)大棚內(nèi)的溫濕度進(jìn)行自動(dòng)調(diào)控。研制了基于GPRS的遠(yuǎn)程監(jiān)控系統(tǒng),系統(tǒng)能與熱交換換氣機(jī)控制系統(tǒng)進(jìn)行遠(yuǎn)程數(shù)據(jù)通信,實(shí)現(xiàn)對(duì)溫室大棚環(huán)境的實(shí)時(shí)遠(yuǎn)程監(jiān)控。將研制的溫濕度控制系統(tǒng)應(yīng)用于溫室育苗生產(chǎn)實(shí)踐,試驗(yàn)數(shù)據(jù)表明,系統(tǒng)具有良好的去濕效果,試驗(yàn)大棚平均濕度較對(duì)照降低6.7%,平均能量回收效率為59.35%,大棚內(nèi)苗體莖高增加0.04cm、莖圍增加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.
【學(xué)位授予單位】：湖南農(nóng)業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：S31;S126

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 蔣篤忠;聶新柏;成R退，

本文編號(hào)：2483105