基于温波传递理论的日光温室土墙体蓄热层及墙体厚度分析  

Analysis on heat storage layer and thickness of soil wall in solar greenhouse based on theory of temperature-wave transfer

作　　者：白青[1,2] 张亚红[1] 孙利鑫[1] 

机构地区：[1]宁夏大学农学院,银川750021 [2]宁夏科技发展战略和信息研究所,银川750001

出　　处：《农业工程学报》2016年第22期207-213,共7页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家科技支撑计划课题(2014BAD05B02);宁夏回族自治区科技支撑计划项目

摘　　要：为研究日光温室土质墙体蓄热层变化规律和墙体最适厚度,测试分析了北墙（厚330 cm）水平方向不同深度温度,结果表明：随墙内深度的增加墙体两侧温波昼夜变化幅度趋于缓和,由内向外温度逐渐降低;从温波振幅看,墙体内50～230 cm温波振幅接近0,基本处于稳定状态,0～50和280～330 cm变化幅度都较大,证实日光温室北墙体存在波动层、稳定层和保温层;提出了利用室内最低气温和墙体内温度确定每日蓄热层厚度的方法,得到试验期间温室墙体蓄热层厚度在55～200 cm之间;同时提出了一种利用墙内温波传播速度计算墙体厚度的方法,对探讨日光温室墙体厚度具有重要意义。The wall plays an important role in the study of the greenhouse. Heat storage layer and thickness of the wall are 2 key factors for studying wall thermal environment and optimizing the structure. As widely used wall in solar greenhouse, soil wall is typical and representative, and it is significant to study heat storage layer and thickness of soil wall. To study the varying rule of the heat storage layer and to find the optimum thickness of the wall, an experiment was performed in Yanghe County, Yinchuan, Ningxia, China in 2011. The fifth generation greenhouse with soil wall from Shouguang City, Shandong Province was used. The CR10X-2M and CR3000 data collectors from America were adopted, and 18 T-types thermocouple temperature probes were also used to test inner wall temperature at the positions of 0, 10, 20, 30, 40, 50, 60, 80, 100, 150, 200, 230, 250, 280 and 330 cm thickness （along horizontal direction of wall body）. The temperature variation was analyzed in the horizontal direction. Indoor temperature and wall temperature were used to determine the thickness of heat storage layer. Besides, a method for calculating wall thickness was pointed out, which was based on wall temperature spreading speed. The results showed with the increase of wall depth, the variation of bilateral temperature-wave of the wall became less obvious. However, the temperatures were gradually decreased from wall surface to exterior surface. Temperature-wave amplitude approached zero at 50-230 cm depth of the wall surface, which was in a stable state. The thickness of heat storage layer was got by using the lowest temperature of inner greenhouse and inner wall. The temperature changed obviously in 0-50 cm and 280-330 cm depth of the wall, which showed wave layer, stable layer and insulation layer existing in the north wall of solar greenhouse, and the thickness of heat storage layer was various. In January, the amplitude of temperature within a month at wave layer ranged from 10.01 to 0.34℃ with an average temperature amplitude of

关 键 词：温室 墙 蓄热 土质墙体 蓄热层 墙体厚度 

分 类 号：S625.1[农业科学—园艺学] TU111.3[建筑科学—建筑理论]