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利用聚氨酯、膨胀珍珠岩、挤塑式聚乙烯保温板 (PEF)、稻壳等隔热材料分别对仓顶、仓拱板上弦及粮面等部位进行控温效果试验。结果表明仓拱内采用 1 0cm珍珠岩 +5 0cm水泥珍珠岩隔热 ,效果最好 ,具有经济、有效的特点 ,最高可降低仓温 1 0℃ ,降低粮温 3～ 4℃ ,延缓了粮食陈化。仓顶采用 2 0cm厚水泥珍珠岩隔热 ,最高可降低仓温 8℃ ;仓拱内采用 3cm聚氨酯隔热 ,最多可降低仓温 6℃。粮面采用 2cm厚PEF材料隔热 ,板上板下最高温差 7℃ ;采用 1 5cm厚稻壳覆盖粮面隔热 ,在一定时间内能够延缓粮温上升
The effect of temperature control on the roof of warehouses, the winding of curvilinear arch and the grain noodles by using polyurethane, expanded perlite, extruded polyethylene insulation board (PEF) and rice hull and other insulation materials were respectively tested. The results show that the use of 10cm perlite +5 0cm cement perlite insulation inside the arch, the best, with economic and effective features, the maximum can reduce the warehouse temperature 10 ℃, reduce grain temperature 3 ~ 4 ℃, delay the food Aging. Roof with 20cm thick cement perlite insulation, maximum temperature can be lowered 8 ℃; warehouse arch 3cm polyurethane insulation, warehouse temperature can be reduced up to 6 ℃. The grain surface is insulated with 2cm thick PEF material, and the highest temperature difference under the slab is 7 ℃. Using 15cm thick rice hull to cover the grain surface, it can delay the grain temperature increase within a certain time