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围护结构三维导热数值仿真研究 总被引:4,自引:0,他引:4
建筑外围护结构的传热性能是供暖系统设计热负荷的主要影响因素 ,围护结构失热量计算的精确与否直接影响室内的热环境 ,影响人的热舒适感觉。围护结构的确定首先应保证住宅结构的安全可靠 ,现有住宅的外围护结构并非由均匀的材料构成 ,如墙体与墙体交接处构造柱的设置 ,墙体与楼板、阳台、屋面连接处圈梁的设置 ,外墙与窗洞口分界处过梁的设置等。与主墙体相比 ,钢筋混凝土构造柱、圈梁、过梁的热导率较大 ,这样 ,在室内外温差的作用下 ,极易形成热桥 ,在墙体内形成三维热传导。热桥能破坏外围护结构的隔热性能 ,加剧室内热量向室外的传递。… 相似文献
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在夏热冬冷地区,对采用R.E-Ⅱ复合保温砂浆外保温系统的混凝土小型空心砌块墙体住宅进行冬季和夏季温度场监测,对其外保温墙体的保温隔热效果进行分析。结果表明该复合墙体的热工性能能够使住宅室内气温与墙体内表面温度较为稳定,改善室内的热环境,有效地提高了室内舒适度,并达到节能的目的。 相似文献
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通过在夏热冬冷地区对采用R.E复合保温砂浆外保温系统的混凝土小型空心砌块复合墙体住宅冬季热工性能的监测,对其外保温墙体保温应用效果进行分析,说明该复合墙体的热工性能能够使住宅室内气温与墙体内表面温度较为稳定,改善室内热环境,有效提高室内舒适度,并达到节能目的。 相似文献
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指出了我国建筑节能的必要性,详细地介绍了外墙建筑节能技术,就唐山市旧房的节能措施以及投资和节能效果进行了分析,以期能够使有关部门、投资企业和供热冷公司等明确投资和居住用户的经济协调关系,从而加快旧房建筑节能的进程。 相似文献
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概括了节能住宅的发展状况,分析了节能住宅对居民的好处以及对节能减排和环境保护的意义,通过对比各种保温方法的优缺点,突出了外墙外保温技术的优越性,说明了建筑节能由居住建筑向公共建筑发展的趋势,从而真正实现所有建筑节能。 相似文献
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针对目前现状,将建筑的各种能耗进行了列举说明,从系统的角度对建筑能耗进行了分析,进而提出了建筑节能的有关建议,统一规划各种能源的使用,以提高能源的使用效率。 相似文献
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三峡库区民居建筑形态初探 总被引:3,自引:2,他引:1
结合三峡库区实地考察以及对瓷器口古镇建筑的实地测绘,从美学要素和建筑形态两方面诠释了川东民居的特色,并且指出考察中发现的问题与不和谐因素,以期给库区新建筑的改良和修建提供建设性意见。 相似文献
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《Energy and Buildings》1987,10(1):29-47
A theoretical study has been performed to determine the effect of variations in convection coefficients on the storage of thermal energy in structural materials in the exterior envelope of buildings. Detailed analytical and numerical analyses have been performed to study the fundamental aspects of the problem for simple geometries. Based on the detailed analyses, a thermal energy storage effectiveness parameter has been defined in terms of the changes in heating and cooling energy requirements of a single-zone building in response to the introduction of mass in its exterior walls. Calculations of the exterior wall effectiveness have been made to investigate the effect of variations in convection coefficients at the interior surface of external envelope materials, as well as the influence of dditional building parameters, such as internal loads, interior air temperature control strategy, and internal mass.To extent the results of the detailed analysis and to study the effects of variable convection coefficients on heating and cooling energy requirements in real buildings, simulations of two prototype residential buildings (in Mexico and the United States) have been performed using the building energy analysis computer program BLAST2. Results indicate that the energy consumption of a typical uninsulated Mexican residence is quite sensitive to the variations in convection coefficients commonly occurring in buildings (a difference up to a factor of three over the range 0.5 ⩽ h ⩽ 10.0 W/m2K). Buildings energy consumption of a typical well-insulated U.S. residence is less sensitive to variations in convection coefficients, although for some climates the effects are still significant (up to a 40% increase over the range 0.5 ⩽ h ⩽ 10.0 W/m2K). Since the convection coefficients at interior building surfaces vary quite widely within this range, this work suggests that for some climates and building constructions, improved characterization of convection coefficients is needed to permit reliable calculation of the energy requirements of buildings incorporating large amounts of thermal mass. 相似文献
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建筑节能是事关我国建设社会主义和谐社会、保持经济社会可持续发展的战略命题。经济激励是建筑节能的合理选择。在对我国建筑能耗现状、建筑节能潜力、建筑节能效益进行分析基础上,论证了我国现阶段对建筑节能进行经济激励的必要性和可行性,借鉴发达国家建筑节能经济激励政策的成功实践,梳理出我国建筑节能经济激励的政策建议与展望,即合理定位、系统设计、动态改进。 相似文献
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结合我国建筑能耗的特点,简单介绍了节能建筑与建筑节能的涵义及区别,针对节能建筑造价管理进行了探讨,阐述了全寿命周期造价管理的概念、工作理念及内容,并提出了节能建筑周期造价管理的发展建议,以指导实践。 相似文献