| 摘要: |
| [目的]研发能代替草帘等传统覆盖物的新型日光温室保温被.[方法]分别选用喷胶棉、羊毛、PE发泡片和毛毡做保温芯材,试制了4种保温被,通过静态热箱试验,以草帘为对照分析了其保温性,并采用浸泡法与土工布综合强力机测试了这4种保温被的防水性和机械强度.[结果]静态热箱试验表明,在21和37 W热源功率下,喷胶棉保温被和羊毛保温被的传热系数分别为3.10,3.26 W/(m2·K)和3.42,3.49 W/(m2·K),而草帘为3.50和3.62 W/(m2·K),二者的保温性优于草帘;防水性的测试表明,羊毛保温被防水性最好,其吸水率为4.85%,喷胶棉保温被次之,为5.99%,PE发泡片保温被最差,为17.66%;机械强度测试表明,喷胶棉保温被的强度最高,为332.5N/cm,羊毛保温被次之,为328.3 N/cm,毛毡保温被最低,为172.7 N/cm.[结论]喷胶棉保温被和羊毛保温被性能良好,有望替代草帘成为日光温室的新型高效保温材料. |
| 关键词: 保温被 日光温室 性能测试 保温性 防水性 机械强度 |
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| 基金项目:国家“十一五”科技支撑计划项目“西北地区高效节能日光温室试验与示范”（2006BAD28B07-5） |
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| Laboratory test of four kinds of heat preservation quilts for solar greenhouse |
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| Abstract: |
| 【Objective】 The study was done to study and develop new heat preservation quilts which can replace the traditional materials such as straws for solar greenhouse.【Method】 Four kinds of heat preservation quilts were made,using spray-bonded nonwoven fabric,wool,puffed PE and secondary felt as thermal insulation materials respectively.Their heat preservation performances were tested with static hot-box experiment to compare with that of the straws’,and the waterproof and mechanical strength were tested using soak method and strength tester.【Result】 The static hot-box experiment indicated that spray-bonded nonwoven fabric quilt and wool quilt exceeded straws in heat preservation performance,with the heat-transfer coefficients under the heating power of 21 and 37 W being 3.10 and 3.26 W/(m2·K) of the spray-bonded nonwoven fabric quilt,3.42 and 3.49 W/(m2·K) of the wool quilt,and 3.50 and 3.62 W/(m2·K) of the straws respectively.The one with the best waterproof performance indicated by the test was the wool quilt,with a water absorption rate of 4.85%,followed by the spray-bonded nonwoven fabric of 5.99%,while the worst was the puffed PE quilt of 17.66%.The one with the highest mechanical strength indicated by the test was the spray bonded nonwoven fabric quilt,with a strength of 332.5 N/cm,followed by the wool of 328.3 N/cm,while the weakest was puffed PE quilt of 172.7 N/cm.【Conclusion】 Spray-bonded nonwoven fabric quilt and wool quilt have good performances concerned,so they are likely to become new highly effective heat preservation materials instead of straws. |
| Key words: heat preservation quilt solar greenhouse performance test heat preservation waterproof mechanical strength |
