装配式日光温室柔性复合墙体性能测试与分析  

Performance testing and analysis of flexible composite walls in assembled solar greenhouse

作　　者：李建明[1] 李浩杰 孙国涛 王杰[1] LI Jianming;LI Haojie;SUN Guotao;WANG Jie(College of Horticulture,Northwest A&F University,Key Laboratory of Protected Horticulture Engineering in Northwest,Ministry of Agriculture and Rural Affairs,Yangling 712100,China)

机构地区：[1]西北农林科技大学园艺学院,农业农村部西北设施园艺工程重点实验室,杨凌712100

出　　处：《农业工程学报》2024年第8期179-187,共9页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家大宗蔬菜产业技术体系项目(CARS-23-C05)。

摘　　要：为解决装配式日光温室柔性墙体蓄热能力不足的问题,该研究通过在墙体内侧附加蓄热层的方式,设计了一种集蓄热、保温和防水多功能于一体的装配式柔性复合墙体。首先,通过对多种材料进行综合性能评估,筛选出优质的表层材料和保温材料,将其复合制成柔性保温墙体;其次,将水、沙子、相变水凝胶(phase change hydrogel,PCH)作为蓄热层固定在柔性保温墙体内侧,从而形成柔性复合墙体;最后,在4个模型温室中分别对墙体进行性能测试,以未附加蓄热层的柔性保温墙体为对照(CK),分析试验墙体的蓄热和保温性能。单一墙体材料的性能测试结果表明,表层材料中镀铝编织布、黑色淋膜毡抗拉性能好且不透水,断裂强力分别为1.06、0.56 kN,断裂伸长率分别为30.99%、65.91%;保温材料中再生棉、太空棉和空气柱保温效果较好且使用成本低,热阻值分别为0.30、0.50、0.76(m^(2)·℃)/W。柔性复合墙体的性能测试结果表明,所有处理中5 kg/m^(2) PCH柔性复合墙体的蓄热和保温性能最佳,热阻值为2.50(m^(2)·℃)/W,单位面积累计吸热量与放热量分别为1.48、1.13 MJ/m^(2);在典型晴天和阴天条件下,该处理的夜间室内平均温度分别比CK提高了3.08、1.87℃。上述分析结果表明,通过在柔性保温墙体内侧附加相变蓄热层的方式,能够增强墙体的蓄热和保温性能。研究结果可为今后装配式日光温室柔性复合墙体设计及材料选择提供理论依据。In order to solve the issue of limited heat storage capacity of assembled solar greenhouse wall,an assembled flexible composite wall incorporating heat storage,insulation,and waterproof functionalities was developed by integrating a heat storage layer within the wall structure.Initially,after evaluating the performance of various materials,premium surface and insulation materials were meticulously chosen and combined to create a flexible insulation wall.Subsequently,according to the different types and amounts of thermal storage materials on the surface of flexible insulation wall,six experimental treatments were designed in this study:The surface of A1,A2 and A3 wall were treated with the same amount of phase change hydrogel(PCH),water and sand thermal storage materials,respectively;The surface of A4,A5 and A6 wall were 5,4 and 3 kg/m^(2) PCH thermal storage materials,respectively.Finally,the wall performance was tested in four model greenhouses and the flexible insulation wall without thermal storage layer was taken as the control(CK)to analyze the thermal storage and insulation performance of the treatment wall by collecting related indexes such as indoor temperature,wall temperature and heat flux.The analysis of individual wall components revealed that the surface materials of aluminized woven cloth and black coated felt had excellent tensile and impermeable properties with the breaking force of 1.06,0.56 kN and breaking elongation of 30.99%,65.91%,respectively.In the insulation materials,the thermal resistance of recycled cotton,space cotton,and air column were 0.30,0.50 and 0.76(m^(2)·℃)/W,respectively,which had the advantages of efficient insulation effect and low usage cost.When all treatments were tested in model greenhouses,the test results of A1,A2 and A3 showed that the heat storage effect of latent heat storage material of PCH was better than water and sand.This indicated that the A1 wall had the best heat storage and insulation performance and the maximum heat absorption and release per unit area

关 键 词：温室 温度 柔性复合墙体 蓄热性能 保温性能 

分 类 号：S214.3[农业科学—农业机械化工程]