共查询到19条相似文献,搜索用时 109 毫秒
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分析砌块夹心复合墙体在严寒地区保温节能方面存在的问题及原因,提出应从设计、施工、监理等各个环节加强对砌块复合墙体的重视程度和技术水平,完善节能住宅认定体系. 相似文献
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为了加强墙体的保温性能,设计了一种复合保温砌块,利用数值模拟方法优化砌块结构,得到一种绝热效果最佳的砌块,并对这种砌块的保温性能、经济性进行了初步分析,论证了此种砌块所具有的优越性及推广应用的可行性。 相似文献
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为提高混凝土复合自保温砌块的热工性能,将相变材料填充到砌块中,形成相变自保温砌块。设计了
五种相变自保温砌块,采用 ANSYS软件模拟分析不同方案的保温性能,得到最优砌块块型。在此基础上,以
西安地区夏季某朝南房间为研究对象,采用 EnergyPlus软件对相变砌块房间展开热环境模拟,研究不同相变
温度及相变材料安装位置对室内热环境的影响,探究最优相变层位置及最优相变温度。研究结果表明:孔型
为三排交错排列的砌块为最优砌块,其砌筑墙体传热系数为0.439W/(m2·K);夏 季 初 始 室 外 气 温 中 温 时
段、中间高温时段以及末期低温时段的最优相变温度分别为24.00、30.00及28.00℃。整个夏季的最优相变
温度为26.00~28.00℃,最优相变层位置为砌块内侧孔。对于整个夏季,相变材料安装位置对室内温度的影
响高于相变温度的影响,优化设计时应重点考虑。 相似文献
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《太阳能学报》2020,(4)
复合相变保温砂浆可作为内保温砂浆与日光温室墙体组成复合相变保温墙体,为温室生产提供热能。通过对日光温室相变墙体相变传热过程的数值模拟研究,可较好地掌握其蓄放热特性,为日光温室应用复合相变材料提供理论支持。该文利用ANSYS有限元分析软件模拟研究日光温室复合相变保温墙体的传热过程,数值模拟结果表明:50 mm复合相变保温砂浆与490 mm砖墙组成的复合相变保温墙体和30 mm复合相变保温砂浆与240 mm加气混凝土砌块墙组成的复合相变保温墙体都具有较强的蓄放热能力,两者的持续蓄热时间均为8 h,持续放热时间分别为16和13 h,这2种复合相变保温墙体均适合于冬季温室生产。 相似文献
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基于矿区老式居民住宅楼冬季供暖单耗的考察、测试数据,遵循封闭式门窗抑制楼内热量向外扩散和外墙敷设保温层降低墙体热值传导系数的原理,制定出了铁法矿区老式住宅楼供暖节能改造总体方案。至2009年10月仅完成了该方案中的封闭式门窗增设工程,投资1 323万元,实现节省热值45.33 GJ/h,已供扩展挂网增收1 600万元。预计2011年10月全部完成节能改造总体方案,将完成总投资13 737万元,节省热值达99.32 GJ/h,供扩展挂网增收总额9 486万元,年增收取暖费2 134.35万元,经济效益和社会效益都十分明显。 相似文献
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分析了传统冷藏集装箱的结构和传热特点,指出了传统冷藏集装箱隔热保温的局限性,提出了使用相变储能材料的隔热板能够减少冷藏车的能耗和费用。阐述了相变储能的原理,总结了相变储能材料在减少室内温度波动和节能方面的应用,提出并设计了一种使用相变储能材料的节能型冷藏集装箱隔热板,可为同类设计提供参考。 相似文献
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A new approach to estimate the heat loss from thermal energy storage tank foundations is presented. Results are presented through analytical correlations based on numerical solutions for the steady‐state heat conduction problem for thermal energy slab‐on‐grade tanks with uniform insulation. Model results were verified with other well‐established benchmark problems with similar boundary conditions and validated with experimental data with excellent agreement. In addition to the TES foundation heat loss, new correlations for the maximum temperature and for the radial evolution of the temperature underneath the insulation layer are also provided, giving important information related to the tank foundation design. The correlated variables are of primordial importance in the tank foundation design because, due to the typical high operating storage temperatures, an inappropriate tank foundation insulation would lead not only to a not desired loss of energy but also to an inadmissible increase of the temperatures underneath the insulation layer, affecting the structural stability of the tank. The proposed correlations provide a quick method for the estimation of total tank foundation heat losses and soil maximum temperature reached underneath the insulation layer, saving time, and cost on the engineering tank foundation design process. Finally, a comprehensive parametric analysis of the variables of interest is made and a set of cases covering a wide range of tank sizes, insulation levels, depths to water table, and storage temperatures are solved. 相似文献
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In countries that import most of their energy, like Turkey, energy saving and the effective usage of energy become much more important. Energy consumption for heating is too high in Turkey because buildings have almost no insulation. Also the high prices of heating energy in Turkey, emphasize the need for energy saving. Therefore, the optimum insulation-thickness of the external wall for the five different energy-sources (coal, natural gas, LPG, fuel oil and electricity) and two different insulation materials (expanded polystyrene, rock wool) are calculated for Denizli. The optimization is based on a life-cycle cost analysis. According to the results, the optimum has been obtained by using coal as the energy source and expanded polystyrene as the insulating material. When the optimum insulation-thickness is used the life cycle saving and payback period are 14.09 $/m2 and 1.43 years, respectively. 相似文献