摘要：根据已有的光辐射分析理论，基于MATLAB语言，本课题建立了一个考虑内部遮阳网、外部遮阳网、屋面覆盖材料的透射率、温室内梁檩骨架结构遮荫率等多种因素影响下的温室内的光环境模型。

应用此模型可以模拟出不同地点的Venlo型玻璃温室内部在一天中任何时刻的太阳光辐照度。此外，本模型中还考虑了室内光辐射环境在晴天、阴天等多种天气条件下的变化情况；模拟出计算室内散射辐射和直接辐射的方法。同时，模型中考还虑了透明覆盖材料的雾度这一因素对散射与直射光辐射的影响。

对这些问题的细致处理使本模型更加准确也更加接近于实际。有利于提高温室整体的管理方式，完善调控手段，进而创造出更适合作物生长的环境，提高作物的产量。

关键词：Venlo型连栋玻璃温室；太阳辐射；光环境预测

ABSTRACT：According to the existing optical radiation analysis theory, based on the MATLAB language, this paper established a model of light environment,considering the effects of the internal shading and external shading and roof covering materials and the rate of shading caused by purlin beam transmission frame structure in the greenhouse

The model can be used to simulate the irradiance of sunlight of Venlo type glass greenhouse at any time of day at different locations. In addition, the model also considers the change of indoor light radiation environment under various weather conditions, such as sunny weather, cloudy and so on, and simulates indoor scattering radiation and direct radiation. Meanwhile, the influence of the haze of transparent cover material on scattering and direct light radiation is also considered in the model.

The careful handling of these problems makes the model more accurate and closer to reality. It is beneficial to improve the whole management style of greenhouse, perfect the means of regulation and control, and then create a more suitable environment for crop growth and increase crop yield.

Keywords: Venlo-Type greenhouse ,solar radiation, light environment prediction

目录

第一章绪论 1

1.1研究的背景和意义 1

1.2国外研究现状 2

1.3国内研究现状 3

1.4现有研究的不足 4

1.5主要研究内容 5

第二章 温室外太阳辐射的分析与计算 6

2.1日地相对参数确定 6

2.1.1太阳赤纬角、太阳方位角、高度角、时角 6

2.1.2日出日落时刻 7

2.2斜面上的太阳位置的确定 8

2.2.1太阳高度角、太阳方位角 8

2.2.2时角 9

2.3水平面瞬时太阳辐射量的计算 10

2.3.1 HOTTEL模型 10

2.3.2 ASHRAE模型 13

2.4室外太阳辐射曲线的模拟 14

2.4.1日出日落时间的确定 15

2.4.2太阳辐射峰值的计算 15

2.4.3室外太阳辐射MATLAB程序开发和流程框图 17

第三章温室内太阳辐射的分析与计算