基于室内外耦合解析的室内自然通风研究

发布时间：2018-02-20 17:21

本文关键词： 建筑自然通风建筑室内外环境微气候 TRNSYS 建筑节能　出处：《华中科技大学》2013年硕士论文　论文类型：学位论文

【摘要】：当今社会，节能与低碳成为全球瞩目的议题，建筑作为资源和能源消耗的巨大载体之一，建筑节能显得尤为重要。被动式节能设计尤其是自然通风能够通过调节建筑本身的形式和构件等来降低对采暖和空调等机械设备的依赖，可以极大地减少能耗实现节能，是值得广泛提倡和研究的设计方法。但在传统的室内热环境研究中，存在按照某一地区的标准气象条件将建筑周边环境设定为均一环境，导致建筑外部环境的差异无法被室内热环境分析充分反映的问题，因此本文尝试在考虑建筑周边环境的微气候变化条件下，通过CFD与多区域模型（TRNSYS）相结合的方法进行室内外耦合模拟，尝试建立一种室内及室外环境耦合的自然通风模拟计算方法，为基于自然通风的建筑节能设计提供一个能够综合考虑建筑周边环境变化对建筑室内热环境所产生影响进行分析的手段。文章首先梳理了国内外关于建筑室内自然通风、结合主动式空调系统达到热舒适的相关技术研究，，接下来运用CFD技术进行建模，将某具体户型热工性能实测结果同基于实例进行的模拟研究结果进行对比，验证了模拟方法的可靠性。利用该模拟方法，结合通风量比，可以计算出全年不同风向下的风环境。基于室内外耦合作用下的室内自然通风即可以通过通风量、换气次数等参数来衡量。在案例研究中，进一步完善定量化研究，利用TRNSYS与CFD计算出的通风量比耦合计算，将其转化为室内在风的作用下的自然室温。同时根据温度、相对湿度、室内风速的不同计算出PMV的变化值，以PMV定量化衡量自然通风的利弊和需要开启空调的时间，整个计算方法结束。最后，对整个工作进行总结，提出若干未来研究的发展方向。
[Abstract]:In today's society, energy conservation and low carbon have become a global issue, and architecture is one of the huge carriers of resource and energy consumption. Passive energy-saving design, especially natural ventilation, can reduce the dependence on heating and air conditioning and other mechanical equipment by adjusting the form and components of the building itself, and can greatly reduce energy consumption to achieve energy conservation. It is a design method worthy of extensive promotion and research. However, in the traditional indoor thermal environment research, the surrounding environment of the building is set as a homogeneous environment according to the standard meteorological conditions of a certain area. The difference of the exterior environment of the building can not be fully reflected by the indoor thermal environment analysis, so this paper tries to consider the microclimate change of the surrounding environment of the building. The indoor and outdoor coupling simulation is carried out by combining CFD with multi-area model TRNSYS, and a natural ventilation simulation method of indoor and outdoor environment coupling is established. This paper provides an analysis method for building energy saving design based on natural ventilation, which can comprehensively consider the influence of the surrounding environment change on the indoor thermal environment. This paper first combs the domestic and foreign research on indoor natural ventilation, combined with the active air conditioning system to achieve thermal comfort related technology, and then use CFD technology to model, The reliability of the simulation method is verified by comparing the measured results of a specific household thermal performance with the simulation results based on an example. The indoor natural ventilation based on the coupling action of indoor and outdoor can be measured by the parameters of ventilation quantity, number of air exchange and so on. In the case study, the quantitative study is further improved, and the coupling calculation of ventilation ratio calculated by TRNSYS and CFD is used to transform it into the natural room temperature of indoor under the action of wind. At the same time, according to the temperature and relative humidity, The change value of PMV is calculated with different indoor wind speed. The advantages and disadvantages of natural ventilation and the time needed to open air conditioning are quantitatively measured by PMV. The whole calculation method is concluded. Finally, the whole work is summarized and some future research directions are put forward.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU834.1

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