日光温室北侧墙体内部冬春季的温度日较差变化分析  

Analysis of the daily temperature differences inside north wall in solar greenhouse during winter and spring

作　　者：杨艳红[1] 李亚灵[1] 马宇婧 杨存良 温祥珍[1] 

机构地区：[1]山西农业大学园艺学院,山西太谷030801 [2]山西忻州原平市粮种场,山西原平034100

出　　处：《山西农业大学学报（自然科学版）》2017年第8期594-599,共6页Journal of Shanxi Agricultural University(Natural Science Edition)

基　　金：国家自然科学基金重点项目(61233006);山西省煤基重点科技攻关项目(FT201402-05)

摘　　要：[目的]确定日光温室建设中合理的墙体厚度。[方法]在山西晋中市选取3种日光温室,北侧墙体底部分别为6.6m(下凹式日光温室)、2m(粘土墙)、0.5m(砖混结构墙体),温室内部跨度分别为15.00m、10.00m、9.25m,在墙体1.5m高度的地方,从室内往外每隔5cm设定一个测点,分别测定墙体冬春季节的温度变化(每0.5h自动记录一次数据),通过各测点的日较差分布区段将墙体划分为不同的层次,并分析其温度拐点的变化。[结果]结果表明:虽然墙体结构、厚度不同,但热交换规律基本一致。根据日较差的变化大小将墙体划分为热交换层、热缓冲层和热稳定层,分别位于墙体从内向外的0~15cm、15~25cm和25cm以后,相对应的日较差变化范围分别为5℃以上(有时达25℃)、2~5℃和0~2℃;通过线性回归计算求得温室墙体内部热交换层与热稳定层的拐点(即热缓冲层)位于17~22cm之间,且拐点处的日较差差异不大,这与墙体的热交换方式(传导放热)有关;从冬到春,墙体内部的拐点位置并没有显著变化,但日较差在降低,这与太阳高度角的变化及通风有关。[结论]经本文分析认为,山西晋中地区日光温室北侧墙体的适宜厚度为30cm。[Objective] In order to determining the reasonable thickness of the north wall in the construction of solar greenhouse. [Methods]Three Chinese solar greenhouses were selected in Jinzhong city, Shanxi province, in which the bottom of the north wall were 6.6 m （for digging-down greenhouse）, 2 m （for clay wall） and 0. 5 m （for brick-mixture wall）, respectively. And the inner span of the greenhouses were 15 m, 10 m, 9.25 m, respectively. The temperature inside north wall （the measuring points were set at every 5 cm from inner surface to the outside） was measured every 0.5 h at 1.5 m height above ground during winter and spring period. According to analyzing the daily differences （TemDIF） of each measuring point, the north wall was divided into different layers, then to analyzing the variation of the inflection point. [Results]Theresult showed that, the heat exchange rules inside north wall were basically the same, although the structure and thickness of north wall were different. According to the variation of the daily TemDIF in each layer, the north wall was divided into three layers that were heat exchange layer, heat buffer and heat stability layer which were located at 0-15 cm, 15-25 cm and beyond 25 cm depth, respectively, from inner surface of north wall to outside. The TemDIF in those layers were above 5 ℃ （up to 25℃）, 2-5℃ and 0-2 ℃, respectively. The change point/inflection point between layers of heat exchange and heat stability was located at 17-22 cm calculated by linear regression. And the daily TemDIF in those points were not very different, which was related to the way of heat exchange （heat conduction） of the north wall. From winter to spring, the location of the change point/inflection point did not change significantly, but the daily TemDIF was decreased a little, it was related to the changes of solar elevation angle and ventilation. [Conclusion]According to the analysis of this paper, the suitable thickness of the north wall in solar greenhouse in Jinzhong, Shan

关 键 词：日光温室 北墙内部 冬春季 日较差 变化 

分 类 号：S625.1[农业科学—园艺学]