相变材料在公路建筑节能中的应用试验研究
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摘要
为研究相变材料在公路建筑中的节能特性,通过模拟公路建筑所处的气候环境,对不同组合形式、调温速率和相变参量下的建筑试件节能保温性能进行了试验研究.同时,提出利用变温法和节能效率值(K_0-K_1)/K_0×100%作为复合墙体节能保温性能的评价指标.试验结果表明:首先,墙体热阻越大,导热系数越低,其节能效果越高,当保温层热阻为0.67m~2K/W时,墙体节能效率最优;其次,相变材料掺量与墙体节能保温性能呈高度正相关特性;在墙体相变板参量为4kg/m~2,中间保温层厚25mm,下部无机板厚25mm,调温速率为1.2℃/h这一工况下,比基准墙体节能约37.5%,复合墙体节能效果最优.
For the study of phase change materials in energy saving features of highway construction,through the simulation of highway construction environment climate,the different combination forms,rate of temperature and phase change parameter of building energy-saving insulation specimen are studied.At the same time,this paper puts forward the evaluation index of energy saving and thermal insulation performance of composite wall by using variable temperature method and energy saving efficiency.The results show that:firstly,the larger the thermal resistance of the wall,the lower the thermal conductivity,the higher the energy saving effect,and the optimal efficiency of the wall energy efficiency when the thermal resistance of the insulation layer is 0.67 m~2K/W.Secondly,the content of the phase change material is highly positive and relevant to the wall energy conservation performance.When the wall phase transition plate parameter is 4 kg/m~2,intermediate thermal insulation layer thickness is 25 mm,lower inorganic thickness is 25 mm,rate of temperature is 1.2℃/h,this condition than the base wall energy saving about 37.5%,energy saving effect of the optimal composite wall.
For the study of phase change materials in energy saving features of highway construction,through the simulation of highway construction environment climate,the different combination forms,rate of temperature and phase change parameter of building energy-saving insulation specimen are studied.At the same time,this paper puts forward the evaluation index of energy saving and thermal insulation performance of composite wall by using variable temperature method and energy saving efficiency.The results show that:firstly,the larger the thermal resistance of the wall,the lower the thermal conductivity,the higher the energy saving effect,and the optimal efficiency of the wall energy efficiency when the thermal resistance of the insulation layer is 0.67 m~2K/W.Secondly,the content of the phase change material is highly positive and relevant to the wall energy conservation performance.When the wall phase transition plate parameter is 4 kg/m~2,intermediate thermal insulation layer thickness is 25 mm,lower inorganic thickness is 25 mm,rate of temperature is 1.2℃/h,this condition than the base wall energy saving about 37.5%,energy saving effect of the optimal composite wall.
引文
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[15]谢望平,汪南,朱冬生,等.相变材料强化传热研究进展[J].化工进展,2008(2):190-195.
[2]LEE W,MUSINA Z.A one-step method for producing microencapsulated phase change materials[J].Particuology,2010(6):588-590.
[3]李靖,宋燕铭,刘雄.隧道入出口延伸照明段落节能方法研究[J].公路工程,2012(2):57-59.
[4]胡庆康.相变材料在建筑节能中的应用及其模拟实验[D].淮南:安徽理工大学,2016.
[5]辛建丽,陈国佳,陆佩玉.节能减排设计理念下的海启高速如东段如东南枢纽方案设计[J].公路工程,2015(5):179-183.
[6]杨献章,胡柏学,廖春芳,等.相变控温技术在桥梁防冻工程的应用[J].公路工程,2013(1):1-4.
[7]张巨松,刘志鑫,黄灵玺,等.相变材料在不同条件下节能效果的实验[J].沈阳建筑大学学报(自然科学版),2013(1):116-120.
[8]张亮,晏华,余荣升,等.相变材料的研究进展及其在建筑领域的应用综述[J].材料开发与应用,2010(1):69-73.
[9]黄芳.纳米强化相变材料应用于储能式电子器件散热系统的数值模拟研究[D].杭州:浙江大学,2012.
[10]吕知梅,于军强,裴丽霞,等.空调蓄冷相变材料的最新研究[J].材料导报,2010(1):133-136.
[11]叶四化,郭元强,吕社辉,等.微胶囊相变材料及其应用[J].高分子材料科学与工程,2004(5):6-9.
[12]尚红波.微胶囊相变材料的制备[D].南京:南京工业大学,2006.
[13]刘星,刘红研,汪树军.石蜡定形相变材料的包裹及热性能[J].精细化工,2006(1):8-11.
[14]王维龙,杨晓西,方玉堂,等.聚乙二醇/二氧化硅定形相变材料的制备[J].化工学报,2007(10):2664-2668.
[15]谢望平,汪南,朱冬生,等.相变材料强化传热研究进展[J].化工进展,2008(2):190-195.