华东型连栋塑料温室自然通风开窗度模型及试验研究

应用流体力学的伯努力方程、连续性方程,设定室内最佳气温,推导出与温室外温度和风速、地理位置、温室结构、时间等多个因素相关联的动态开窗度模型.最后用此模型进行了温室的开窗控制,测出在此模型控制下的室内温度与模型要求基本吻合,说明此模型能控制自然通风下华东型连栋塑料温室的温度,为华东型温室的智能控制作了基础的理论分析.

Opening model of natural ventilation windows for East-China Multi-span Plastic Greenhouse and studies on it

Natural ventilation has taken very important role in adjusting the thermal environment of East-China Multi-span Plastic Greenhouse. Using Bernoulli equation and continuity equation of hydrokinetics, setting up the high-point temperature in greenhouse, the dynamic opening model of natural ventilation windows was set up, which has relations with the temperature out greenhouse, wind speed, time, geographic position and structure of greenhouse. Finally using this model to control the opening of ventilation windows, the temperature data measured in greenhouse had good agreement with the requirement. These results proved the model could control the temperature of East-China Multi-span Plastic Greenhouse under nature ventilation condition and did the based theoretical analysis of intelligent control for the East-China Multi-span Plastic Greenhouse.