日光温室砖混结构墙体内冬春季温度状况

通过对日光温室砖混结构墙体温度变化状况进行观测分析,结果表明:墙体温度受到温室内和温室外气温的影响,墙体不同深度间存在明显的差异。内侧墙体受直射光及室内气温的影响,温度变幅较大,尤其是距温室内侧墙体表面5 cm、10 cm、15 cm处的温度,在1月份寒冷季节日变幅分别达到20℃、15℃、10℃左右,是吸贮热或放热的主要部位;墙体外侧也受外界气温的影响,但影响范围局限在距外表面15 cm之内,且变幅较小。在墙体内部还存在着一个热稳定层,位置在距墙体内侧表面30~35 cm处。墙体温度的变化也受到季节变化的影响,在低温寒冷时期与外界的温差大,相反春夏之际温差会缩小,反映出冬季墙体对于温室的重要作用。

Analysis of Temperature Within North Composite Wall of Solar Greenhouse

The observation and analysis of temperature within north wall(composite with different materials) of solar greenhouse were conducted during winter and spring seasons.The results showed that the temperature of north wall was affected by the temperature indoor and outdoor.And there was obvious temperature difference in different depth of north wall.The daily temperature differences within north wall during cold time were larger,up to 20 ℃,15 ℃,10 ℃,5 ℃ for 5 cm,10 cm,15 cm,20 cm away from inner surface,respectively,due to the effect of direct sunlight and temperature in the greenhouse.It is suggested that 0~20 cm is the main part of north wall for heat absorbing and releasing.The temperature difference in outer side of north wall was affected by outdoor temperature,limited in 5 ℃,and within 15 cm away from outside surface of the wall.There was a layer of heat stable inner side of the wall,located at 30~35 cm away from inside surface.The temperature of north wall was affected by season,larger temperature difference during cold time,and smaller during warmer season.It is suggested that north wall is very important for solar greenhouse during winter time.