日光温室墙体与地面吸放热量测定分析

Analysis on measurement of heat absorption and release of wall and ground in solar greenhouse

为研究日光温室土质后墙与地面对室内的放热情况,测定了晴、阴天气条件下土质后墙和地面的表面温度及热通量。结果表明,单位面积墙体与地面各自的放热量与室内太阳辐射密切相关,晴天夜间单位面积墙体放热量为1.90MJ/m2,地面放热量为1.36MJ/m2,而阴天夜间单位面积墙体放热量为0.76MJ/m2,地面放热量为1.34MJ/m2。对于单位面积墙体和地面而言晴天墙体放热量大于地面,阴天地面放热量大于墙体,无论晴天与阴天地面全天放热总量总是大于墙体释放总量,且地面对周期热量变化的缓冲大于墙体。

The study observed heat release of soil back wall and ground of greenhouse,and measured surface temperature and heat flux of soil back wall both in sunny days and cloudy days.The result showed that heat release of per unit wall area and ground surface had a close relationship with solar radiation in greenhouse.The heat release of per unit wall area was 1.90 MJ/m^2 at night in sunny days,and the heat release of ground was 1.36 MJ/m^2 ;while the heat release of per unit area was 0.76 MJ/m^2 at night in cloudy days,and the heat release of ground was 1.34 MJ/m^2 .During sunny days,the heat release of wall was greater than that of ground,while the heat release of ground was greater than that of wall in cloudy days.No matter it is on sunny days or cloudy days,the total amount of heat release was greater than that of wall,moreover,the ground buffer of cycle heat changing is better than the wall.