热量平衡法确定日光温室换气次数  

Air Exchange Rate Calculation for Solar Greenhouse Using Thermal Balance Method

作　　者：佟国红[1] 车忠仕[1] 白义奎[1] 山口智治[2] 

机构地区：[1]沈阳农业大学水利学院,沈阳110161 [2]日本筑波大学农林工学系,日本筑波305-8572

出　　处：《沈阳农业大学学报》2008年第4期459-462,共4页Journal of Shenyang Agricultural University

基　　金：辽宁省博士启动基金项目(20061040)

摘　　要：准确估计日光温室冬季生产时热收支是实现温室环境合理调控的基础,正确估计温室换气次数则可正确估计由冷风渗透引起的失热。因此,从热量平衡的角度出发,建立了求解日光温室换气次数的模型,计算了12m跨度不加温日光温室在12月至2月晴天的换气次数。结果表明:投射到室内地面上的太阳辐射显热转换系数为80%及30%两种情况下,前者日均换气次数变化为0.94～2.31h-1,后者为0.28～1.32h-1,最小值出现在12月。夜间的换气次数基本在0.13～0.2h-1范围内。由热量平衡法确定的日光温室换气次数与现有文献中换气次数吻合。Precise estimation for thermal gain and loss during the solar greenhouse operation is the main concern for reasonable control inside greenhouses. Air infiltration loss depends on air exchange rate. Thermal balance method was used to calculate air exchange rate in winter time from December to February for solar greenhouse, 12 m span without auxiliary heat recourses. Calculation results showed that air exchange rates in 80% and 30% （accounted for sensible change factors of incident solar insolation on ground inside） were different with daily average air exchange rate, 0.94h^-1 to 2.31h^-1 for 80% case and 0.28h^-1 to 1.32h^-1 for 30% case. The air exchange rates were smaller in December than in other months. Nocturnal air exchange rates were nearly from 0.13h^-1 to 0.2h^-1. Air exchange rates based on thermal balance agree well with those in former literatures.

关 键 词：日光温室 热平衡 换气次数 

分 类 号：S625[农业科学—园艺学]