共查询到18条相似文献,搜索用时 93 毫秒
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介绍了自然通风常见的基本形式.从节能、舒适性、可控制性和可靠性等方面分析了自然通风技术的应用,指出了自然通风存在的问题与发展,并给出几种自然通风技术的发展应用.自然通风是一个整体建筑设计概念,需要各专业研究设计人员的相互配合. 相似文献
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阐述了太阳能烟囱技术的技术原理及研究进展,在国内外大量学者试验研究、理论分析及模拟研究的基础上,提出了当前研究存在的问题,并对太阳能强化自然通风技术的继续研究提出了相关建议。 相似文献
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在公共建筑中,自然通风技术正在被日益广泛地采用,降低了能耗,提升了建筑内部环境空气质量,最大限度地使室内的人员舒适并保护他们的健康。 相似文献
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绿色建筑中的自然通风 总被引:4,自引:0,他引:4
分析了现代建筑中造成室内空气品质恶劣的主要因素,提出了应当在绿色建筑中着力推广采用自然通风系统。同时,还分析了在绿色建筑中采用自然通风系统迫切需要解决的几个技术问题。 相似文献
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随着能源危机的加剧,建筑能耗和环境问题的日益严重,可持续发展的理念已成为人类的共识,绿色建筑是建筑行业发展的必然趋势。可从建筑的通风系统入手,优化机械通风系统的使用,减少环境污染,同时提高人们的生活质量,实现与自然和谐发展的目标。 相似文献
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被动式生态建筑中庭的自然通风设计策略 总被引:1,自引:0,他引:1
分析中庭设计存在的问题,将被动式生态设计与中庭结合,归纳总结了寒冷气候区、温和气候区、干热气候区、湿热气候区等4种典型气候类型对中庭被动式生态自然通风设计的影响,提出有效的通风策略和中庭自然通风的季节性调控技术。另外,还提出自然通风控制技术和构造策略,提供了一些新的视角,赋予中庭空间新的意义,为生态建筑中庭的自然通风设计提供参考。 相似文献
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太阳能烟囱的通风效应及应用研究 总被引:4,自引:0,他引:4
对太阳能烟囱自然通风模型进行了理论分析和数值计算,得出了通风量与烟囱高度、宽度及太阳辐射强度之间的关系。最后提出了太阳能烟囱在应用中应注意的几个问题。 相似文献
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The energy policies about energy efficiency in buildings currently focus on new buildings and on existing buildings in case of energy retrofit. However, historic and heritage buildings, that are the trademark of numerous European cities, should also deserve attention; nevertheless, their energy efficiency is nowadays not deeply investigated. In this context, this study evaluates the thermal performance of a traditional massive building situated in a Mediterranean city. Dynamic numerical simulations were carried out on a yearly basis through the software DesignBuilder, both in free-running conditions and in the presence of an air-conditioning (AC) system. The results highlight that the massive envelope of traditional residential buildings helps in maintaining small fluctuations of the indoor temperature, thus limiting the need for AC in the mid-season and in summer. This feature is highly emphasised by exploiting natural ventilation at night, which allows reducing the building energy demand for cooling by about 30%.The research also indicates that, for Mediterranean climate, the increase in thermal insulation does not always induce positive effects on the thermal performance in summer, and that it might even produce an increase in the heat loads due to the transmission through the envelope. 相似文献
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Experimental study for natural ventilation on a solar chimney 总被引:1,自引:0,他引:1
J. Arce M.J. Jimnez J.D. Guzmn M.R. Heras G. Alvarez J. Xamn 《Renewable Energy》2009,34(12):2928-2934
Thermal performance of a solar chimney for natural ventilation was experimentally investigated. The experimental model was implemented on full scale and real meteorological conditions, so that experimental results will be compared with the simulation results. The results show that for a maximum irradiance of 604 W/m2, occurring around 13:00 h on September 15th, 2007, a maximum air temperature increment of 7 °C was obtained through the solar chimney. Also, a volumetric air flow rate ranging from 50 to 374 m3/h was measured on that day. Thus, an average air flow rate of 177 m3/h was achieved from 0:00 h to 24:00 h. The experimental solar chimney discharge coefficient, Cd, was 0.52. This coefficient is useful to determine the mass flow rate in the solar chimney design. It was observed that the air flow rate through the solar chimney is influenced by a pressure difference between input and output, caused by thermal gradients and wind velocity, mainly. 相似文献
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The performance of a glazed solar chimney for heat recovery in naturally-ventilated buildings was investigated using the CFD technique. The CFD program was validated against experimental data from the literature and good agreement between the prediction and measurement was achieved. The predicted ventilation rate increased with the chimney wall temperature. The effects of solar heat gain and glazing type were investigated. It was shown that in order to maximise the ventilation rate in a cold winter, double or even triple glazing should be used. Installing heat pipes in the chimney for heat recovery not only increased the flow resistance but also decreased the thermal buoyancy effect. To achieve the required air flow rates in naturally-ventilated buildings with heat recovery, use should be made of wind forces. 相似文献
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数值模拟了单体自然通风建筑模型内的空气流动和污染物扩散,考察了紊流施密特数Sct对污染物模拟值的影响。结果表明,选取的3种紊流模型对时均流速和紊动能的模拟值和风洞试验值基本一致,标准k-ε模型与realizable k-ε模型模拟的流场较相似,其浓度场结果也基本相同,当Sct为0.8~1.0时,模拟值和试验值吻合得最好。由于RNG k-ε模型对地面污染源附近的时均流动模拟不准确,导致其浓度模拟值和试验值相差较大,因此,选取合理的Sct时,应基于准确的流动模拟,而不能仅考察浓度模拟值和试验值的吻合程度。 相似文献