某中庭式商业建筑中送下回气流组织模拟及分析研究

发布时间：2018-03-07 20:59

  本文选题：中庭气流组织　切入点：CFD模拟　出处：《南京师范大学》2017年硕士论文　论文类型：学位论文

【摘要】：采用玻璃屋顶的中庭式商业建筑由于温室效应和烟囱效应的叠加,使得建筑内形成了独特的热环境,对工作区域人们的舒适性产生了重要影响,同时,中庭这种高大的建筑空间易产生大量的渗透负荷,带来空调能耗的增加,上述原因使得中庭式建筑气流组织布置越来越受到人们的重视。本文参考层式送风在建筑内采用中送下回式(论文中又称中送风)气流组织布置,对降低中庭式建筑内空调能耗,改善建筑内人的舒适性有着积极的作用。本文的研究对象是南京某商场,该商场为顶部带有玻璃屋顶的中庭式建筑,本文的工作内容有:首先,文章对CFD的基础理论和气流组织评价指标作了简单介绍,为后文的研究作了铺垫;其次,对目标商场的空调运行参数进行现场测试,测试内容包括室外温度、室内温度、空调送风温度、空调送风风速等,在现场测试数据的基础上,然后利用数值模拟软件Airpak对目标商场进行合理简化,以实测数据作为边界条件进行建模,通过数值运算得出模拟结果,将模拟结果与现场实测数据进行对比,验证了数值模型的正确性,也说明了 CFD的方法研究气流组织分布是可行的;最后,结合目前建筑内气流组织分布及存在的问题,本文提出在中庭四周走道区域采用中送下回的气流组织布置,利用数值模拟的方法,对多组工况下的送风高度、送风温度、送风风速分别进行模拟,得出不同工况下的气流组织分布,然后结合气流组织评价指标分析对比模拟结果,确定出在该气流组织布置下的最佳送风参数,模拟结果显示最佳参数为送风高度2.2m,送风温度19℃,送风速度1.2m/s。文中还将商场采用中送下回气流组织布置下的流场分布与原气流组织下的流场分布进行对比,对比表明,在中送风的情况下,建筑内温度场的分布更为均匀,人们的舒适性更高。由于文中采用了简化模型,没有考虑到现实建筑内部结构以及微气候的复杂性,故模拟结果与现实存在一定差距。本文研究的目的旨在提供一种气流布置策略,为今后的相关设计提供思路与方法的参考。
[Abstract]:Because of the superposition of Greenhouse Effect and chimney effect, a unique thermal environment is formed in the atrium commercial building with glass roof, which has an important impact on the comfort of people in the working area, at the same time, The large building space of the atrium is prone to produce a large amount of permeable load, resulting in an increase in the energy consumption of air conditioners. Because of the above reasons, people pay more and more attention to the air distribution of atrium buildings. The research object of this paper is a shopping mall in Nanjing, which is a atrium building with glass roof at the top. The main contents of this paper are as follows: first of all, This paper briefly introduces the basic theory of CFD and the evaluation index of airflow organization, which paves the way for the later research. Secondly, the air conditioning operation parameters of the target shopping mall are tested on the spot, including outdoor temperature, indoor temperature, indoor temperature, etc. Based on the field test data, the temperature of air supply and the air velocity of air conditioning are reasonably simplified by using the numerical simulation software Airpak, and the measured data are used as boundary conditions to model the target market. The simulation results are obtained by numerical calculation, and the simulation results are compared with the field measured data to verify the correctness of the numerical model. It also shows that the CFD method is feasible to study the distribution of airflow. Combined with the distribution of airflow and the existing problems in the building at present, this paper puts forward to adopt the airflow organization arrangement of the middle and next return in the corridor area around the atrium, using the method of numerical simulation, and using the method of numerical simulation, the air supply height and the air supply temperature under many working conditions are studied. The distribution of air distribution under different working conditions is obtained by simulation of air supply wind speed, and then the optimum air distribution parameters under the arrangement of air distribution are determined by analyzing and comparing the simulation results with the evaluation index of air distribution. The simulation results show that the optimum parameters are as follows: air supply height 2.2 m, air supply temperature 19 鈩，

本文编号：1580929