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采用羟丙基甲基纤维素(HPMC)、氯化钠、纯净水研制了热致调光材料,测试了不同配比下该材料的热致转变温度、光谱透过率.通过数值分析,研究了热致调光中空玻璃窗模型的热致浑浊转变速度,并通过实际测试比较了热致调光中空玻璃窗与普通中空玻璃窗及Low-E中空玻璃窗的辐射透过率.结果表明:羟丙基甲基纤维素(HPMC)、氯化钠、纯净水的质量比为2∶10∶100时,可以满足实际建筑热致转换需求,以此配比研制的热致调光中空玻璃窗应用于亚热带地区建筑,能自动阻隔夏季约90%的太阳辐射热量,而冬季又能透射约70%的太阳辐射能. 相似文献
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绿色纤维素醚类热致调光材料的研制及节能效果 总被引:3,自引:0,他引:3
采用羟丙基甲基纤维素(HPMC)、氯化钠、纯净水研制了绿色纤维素醚类热致调光材料,测试了不同配比下的热致转变温度、可见光透射比及太阳光直射透射比。通过能耗模拟分析,研究了不同配比热致调光中空玻璃窗的节能效果。结果表明:羟丙基甲基纤维素(HPMC)、氯化钠、纯净水质量配比在2:15:100时,可以较好地满足实际建筑热致转换需求,以此配比研制的热致调光中空玻璃窗运用于夏热冬冷地区,其节能效果比Low E中空玻璃窗高约3%,比普通中空玻璃窗高约8%。此类热致调光材料在节能建筑和绿色建筑中具有广阔的应用前景。 相似文献
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建筑节能用调光玻璃 总被引:4,自引:0,他引:4
谢可勇 《墙材革新与建筑节能》2004,(10):32-34
本文介绍了几种建筑节能用调光玻璃,包括电致调光玻璃、热致调光玻璃和液晶调光玻璃,阐述了其工作原理,综述了调光玻璃的研究现状。 相似文献
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介绍了致变色材料的研究进展,阐述了热致变色、光致变色、电致变色的原理,并讨论了这些致变色材料在建筑节能窗上的应用和存在的问题,并展望了这一方兴未艾的领域。 相似文献
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《Planning》2014,(12)
以自制的可熔融丙烯腈(AN)-丙烯酸甲酯(MA)共聚物为基体,以碳酸乙烯酯(EC)与柠檬酸三乙酯(TEC)为复配稀释剂,采用热致相分离法(TIPS)制备丙烯腈-丙烯酸甲酯(AN-MA)/纳米二氧化钛(TiO2)复合膜。借助场发射扫描电子显微镜(FESEM)、X-射线衍射仪(XRD)和万能试验机,从微孔膜的力学性能、水通量、孔隙率、晶型等方面对膜的结构与性能进行表征。结果表明,添加TiO2纳米粒子可以显著提高AN-MA微孔膜的机械强度和水通量。随着TiO2含量的增加,微孔膜的机械强度先增加后降低,TiO2质量分数为0.1%时,断裂强度最高可达8.0 MPa,比未添加TiO2的样品高36%。纳米TiO2的加入一定程度上抑制了大孔的产生,微孔膜结构更加均一。随着凝固浴温度的升高,微孔膜的力学性能逐渐提高,通量出现下降趋势。 相似文献
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In this study, we evaluated the long‐term antifungal effectiveness of 3 types of interior building materials (gypsum board [GB], cement board [CB], and softwood plywood [S‐PW]) impregnated with thermally reduced silver nanoparticles supported by titanium dioxide (AgNPs/TiO2) under 95% relative humidity for 4 weeks. AgNPs/TiO2 was synthesized at 2 thermal reduction temperatures (TRTs, 120 and 200°C) with 2 different AgNP weight percentages (2 and 5 wt%). Four different silver‐loading levels (SLLs, 0.025, 0.05, and 0.5 μg/cm2 and the critical concentration required to inhibit fungal growth on agar plates) and 3 fungal species (Aspergillus niger, Penicillium spinulosum, and Stachybotrys chartarum) were used in the experiments. Higher temperature reduced more ionic Ag+ to metallic Ag0 and increased the dispersion of Ag on TiO2 surface. The 200°C thermally reduced AgNPs/TiO2 demonstrated excellent antifungal efficiency: Mold growth was almost completely inhibited for 28 days at the low SLL of 0.5 μg/cm2. Additionally, AgNPs/TiO2 exhibited higher antifungal activity on GB and CB than on S‐PW. The stepwise regression results indicated that the TRT of AgNPs/TiO2 (β = ?0.739 to ?0.51), the SLL (β = ?0.477 to ?0.269), and the Ag0 level in the AgNPs (β = ?0.379 to ?0.136) were the major factors influencing antifungal activity and TRT might be the most significant one. 相似文献
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从生态与环境的视角论述装饰材料及其利用方面的特质,并对装饰材料的利用中存在的问题进行分析,提出装饰材料可持续利用与生态调控的对策。 相似文献
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《Fire Safety Journal》2005,40(5):395-410
The standard methods used to derive effective thermal properties of thermally thick materials based on bench-scale radiant exposure tests are reviewed and analyzed. These methods are compared with numerical calculations for the same boundary conditions. These comparisons show that the standard analytical methods for predicting surface temperature histories are not accurate because they either ignore heat losses from the surface or do not adequately treat the highly nonlinear reradiative surface heat loss term. A method is presented for determining more accurate values for the thermal inertia based on effective values for this term published widely in the literature. It is found that actual thermal inertias tend to be lower by about a factor of 1.3–2.7 when compared with reported effective values for a wide range of conditions. This can have a significant effect on flame spread predictions for models that rely on accurate values for the thermal inertia. 相似文献
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李湘洲 《墙材革新与建筑节能》2001,(2):32-33
一、概述 高层建筑的迅速发展,带来建筑材料的供需矛盾,减轻建筑物自重和抗震设计等问题更为突出。目前,我国的高层建筑物自重一般为1.2-1.7 t/m2。当然,这样的自重偏高,材料用量多,势必给设计、施工、运输和造价等诸多方面带来不利因素。 国外建筑材料的发展不断推动建筑技术的进步,其中最显著的特点之一就是建筑物的重量不断减轻,材料用量不断减少,材料的潜力逐步得到发挥。其总的趋势是:结构材料正在朝着轻质高强的方向发展,而围护材料不但轻质高强,而且具有隔音、隔热、防火、防腐等良好性能。它们不但满足了对… 相似文献
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针对当前乃至今后消防工作与火灾斗争的现实需要,提出运用经济策略调节火灾风险,加大消防投入的观点,分析了在火灾风险控制中运用经济策略的必要性、因果性、合理性以及可行性,提出了实现火灾风险调控的几种经济策略,以期与法律、行政于一体,掌握与火灾隐患现实斗争的主动性,增强有效性。 相似文献
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Metin Arikan Konstantin Sobolev Tomris Ertün Asim Yeğinobali Pelin Turker 《Construction and Building Materials》2009,23(1):62-70
Kaolin, one of the materials of major importance for the ceramic and paper industry, is also used in the construction industry as a raw material for the production of white cement clinker and, in the form of metakaolin, as an artificial pozzolanic additive for concrete. Metakaolin is a vital component of high-performance and architectural concrete; however, its application in regular concrete is very limited due to relatively high production costs. This report evaluates the performance of a low-cost metakaolin-based additive called thermally activated kaolin (TAK), in cement. Due to its pozzolanic properties and the densification of cement matrix, the application of TAK provides a 15% improvement of the compressive strength. It was shown that TAK of optimal quality can be manufactured by the thermal treatment of raw kaolin with 74% of kaolinite at 750 °C without the intermediate beneficiation stage. The application of a developed approach can significantly reduce production expenditures and make the application of such an additive feasible even in regular-grade cement and concrete. 相似文献
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轻型木结构房屋的主要建筑材料 总被引:1,自引:0,他引:1
针对轻型木结构房屋的建筑材料与我国传统梁柱体系的木结构房屋的不同,指出其主要以小尺寸的规格材和板材组合成的木剪力墙、楼盖、屋架作为主要受力构件,从而利于工业化生产和充分利用木材. 相似文献
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作为在中国宏观调控非常时期上任的日立建机(上海)有限公司总经理,在很多人的心目中都是一个迷。一位异国人,能在刚刚上任不久,面临宏观调控的重大;中击,沉着冷静地出台一系列措施,在变化莫测的中国市场中游刃有余。在中国工程机械市场急转直下时,他是如何应对市场形势来领导这个企业的?面对市场的强大冲击,他又如何带领日立建机向前迈进?就此本刊记者有幸采访了他。 相似文献