节点文献
温室热环境动态模拟研究
The Research on the Dynamic Model of the Thermal Environment of Greenhouse
【作者】 杨锋;
【导师】 何德明;
【作者基本信息】 新疆农业大学 , 农业机械化, 2004, 硕士
【副题名】以天彩集团温室为例
【摘要】 温室是农业生产性建筑设施。现代温室生产的一个主要特征,是可根据室外气象条件和作物生长发育阶段,利用控制设备对温室内环境条件进行有效控制,采用连续生产方式和管理方式,高效、均衡地生产。温室是一个半封闭的环境系统,受外界环境因素的影响很大。因此对乌鲁木齐地区的温室内部环境进行研究,对发展本地温室产业具有重要意义的。本文以天彩集团的棉花育种温室的热环境为研究对象。首先,介绍对温室内热环境有密切联系的温度环境、光环境和湿度环境的特点以及棉花生长发育对这些环境的要求。其次,将整个温室分为覆盖层、内部空气、作物层和土壤等四个层次,根据传热学原理,分别对这四层建立热平衡方程。再次,采用适当的数值算法并运用MATLAB编程求解该热平衡方程组,验证方程组的正确性,分析温室环境的特点以及变化趋势。最后,根据该温室不足之处,对温室的改造提出建议。
【Abstract】 The greenhouse is a kind of agriculture production building facilities. A main characteristic of modern greenhouse is to make use of the control equipments to control the environment in the greenhouse according to the outdoors weather term and the stage of the growth and adopt the continuous mode of production with manage the way efficiently and balanced. The greenhouse is a half-closed environment system, which is influenced by the outdoors environment greatly. Proceeding the research on the internal environment of greenhouse in the region of Urumqi is of great importance to develop the native glasshouse industry. The research object of this text is the internal environment of the Rainbow Group’s cotton breeding greenhouse. First of all, introduce the characteristics of the light environment, the temperature environment and the humidity environment, which affect the internal thermal environment of greenhouse greatly and the request to these environment of cotton breeding briefly. Secondly, divide the whole greenhouse into the four layers, which is the cover, the internal air, the plant and the soil. According to the theory of heat conduction, establish the thermal balanced equation of the four layers. Thirdly, adopt the definite numerical arithmetic, and use the MATLAB to program to solve the non-linear equation system and validate the correctness of it. Finally, find out the disadvantages of the greenhouse and put forward the suggestion to reconstruct it.
- 【网络出版投稿人】 新疆农业大学 【网络出版年期】2004年 04期
- 【分类号】S625
- 【下载频次】261