内置空气-卵石槽对日光温室横向地温的影响

Influence of Inside Air-pebble Groove on Lateral Soil Temperature in Solar Greenhouse

空气-卵石槽包括卵石槽、通风管道和风机,它的工作原理通过风机将室内富余热空气传送至卵石槽内部进行蓄放热。为详细了解该卵石槽内部温度变化以及其对日光温室土壤温度的影响,在陕西杨凌日光温室中测试了南墙内侧内置空气-卵石槽的试验隔间和无空气-卵石槽的对照隔间的土壤温度变化规律。结果表明:空气-卵石槽是一个有效地蓄放热体,与对照隔间相比,试验隔间内置空气-卵石槽可使土壤温度提高1.0～2.4℃,土壤边际界点南移距离在温室跨度的7.5%以上,有效地扩大了日光温室冬季种植的土壤温度稳定区域。

The air pebble trough includes pebble tank,ventilation duct and fan. Its working principle is to trans fer indoor excess hot air into the interior of the pebble tank for heat storage by the fan. In order to understand the internal temperature variation of the pebble tank and its effect on soil temperature in solar greenhouse,ex periments were conducted in a test compartment （with an air-pebble groove inside south wall） and a control compartment （without air pebble groove） in a solar greenhouse in Yangling,Shaanxi Province. The resultss bowed that the air pebble trough is an effective heat storage body. Compared with the control compartment,the air pebble trough inside the test compartment could increase soil temperature by 1.0 to 2.4℃. The marginal boundary point of the soil was moved southwards more than 7. 5% of the greenhouse span, which effectively expands the soil temperature stability area of the greenhouse in winter.