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为研究日光温室土质梯形截面墙体热量环境,测定了温室墙体内表面上、中、下3点太阳辐射照度、热通量及3点距墙内表面0.05m和0.30m处2个层次测点的温度。结果表明:墙体表面上、中、下3点太阳辐射和墙内温度由上向下均逐步升高,3点日均太阳辐射总量分别为2.21、2.30、3.08MJ·m~(-2);0.05m处上、中、下3点平均温度分别为2.37、13.83、14.13℃,0.30m处分别为11.13、12.62、13.34℃;3点吸热量也是由上向下依次升高,试验期间3点分别累计吸热85.60、85.80、92.89MJ·m~(-2);墙体上部平均放热量最小,下部次之,中部最大,上、中、下3点放热量分别为76.47、96.88、93.70MJ·m~(-2);墙体吸热和太阳辐射直接相关,也和墙体放热显著相关,墙体放热又与墙内温度相关,因此太阳辐射直接影响到墙体热量环境。试验证实日光温室土质梯形截面墙体不同高度太阳辐射与热环境存在差异。
In order to study the thermal environment of soil trapezoidal cross-section wall in solar greenhouse, the illuminance, heat flux and solar radiation fluxes at three points above, below and below the inner surface of the greenhouse were measured and two levels at 0.05m and 0.30m The temperature of the point The results show that the solar radiation at the middle, the lower 3 points and the temperature inside the wall increase gradually from top to bottom. The total daily solar radiation at 3 o’clock are respectively 2.21, 2.30, 3.08 MJ · m -2 ); 0.05m at the upper, middle and lower 3-point average temperature was 2.37,13.83,14.13 ℃, 0.30m at 11.13,12.62,13.34 ℃; 3:00 endothermic also increased in turn from the top to the bottom, the test During the period, the accumulative endotherms were respectively 85.60, 85.80 and 92.89 MJ · m -2 at 3 o’clock. The average heat release in the upper part of the wall was the lowest, followed by the lower part, and the maximum in the middle part was 76.47 and 96.88 at the middle, , 93.70MJ · m -2. Wall heat absorption and solar radiation are directly related to the wall heat release is also significantly related to wall heat and the wall temperature, solar radiation directly affects the wall heat surroundings. Experiments confirmed that there are differences between solar radiation and thermal environment at different heights of trapezoidal cross-section wall in solar greenhouse.