高大空间建筑不同供暖末端方式的耗热量研究

发布时间：2018-11-03 07:12

【摘要】：目前,由于高大空间建筑在冬季供暖时,室内气流组织异常复杂,热空气由于热浮力影响上浮,极易出现上热下冷的温度分层现象,这是对供暖工况极为不利的,而且采用不同的供暖末端方式,产生室内温度分层的效果也不尽相同,这也对暖通设计工程师提出了更高的要求。目前没有统一的行业规范规定高大空间建筑冬季供暖工况的耗热量计算方法,只是在原有的传统耗热量计算方法上进行高度附加、风力附加以及朝向附加修正。对高大空间建筑来讲,区别于普通建筑冬季供暖的最大一点是其温度分层特别明显。考虑到高大空间建筑的功能用途在社会生活上出现的频率,本课题选择了工业建筑和公共建筑作为高大空间建筑的研究对象;因严寒地区和寒冷地区建筑的围护结构的节能性要求不一样,本课题选择了严寒地区的哈尔滨市和寒冷地区的北京市和郑州市作为地方性的典型城市;依据目前市场上常用的供暖方式,本课题选择了散热器供暖、低温地板辐射供暖、燃气红外辐射供暖3种供暖末端方式。为了研究不同供暖末端方式的高大空间建筑的耗热量情况,本文先用传统耗热量计算方法计算了各地区不同类型高大空间建筑的不同供暖末端方式的供暖耗热量情况。通过CFD数值模拟手段对18种工况进行仿真计算,对比供暖模拟耗热量和理论计算耗热量的差值,通过对温度场的不均匀度评价,表明现有的耗热量计算方法并不完全适合于高大空间建筑的供暖耗热量计算。本文研究发现高大空间建筑的供暖耗热量是和其供暖末端方式相关的,而且高度附加耗热量的选择对高大空间建筑供暖设计关重要的作用。此外,同一地区,不同建筑类型的高大空间建筑对不同供暖末端方式的耗热量计算有较大影响;同一建筑类型,不同气候分区的高大空间建筑也对不同供暖末端方式的耗热量计算有重要影响。
[Abstract]:At present, because the indoor airflow organization is very complicated when the large space buildings are heating in winter, the hot air is floating because of the influence of thermal buoyancy, so it is easy to appear the phenomenon of temperature stratification of upper heat and lower cooling, which is extremely disadvantageous to the heating condition. Moreover, the effect of indoor temperature stratification is different with different heating terminal methods, which puts forward higher requirements for HVAC design engineers. At present, there is no uniform industry standard to calculate the heat consumption of large space buildings in winter. It is only to carry on the height addition, the wind force addition and the orientation additional correction in the original traditional heat consumption calculation method. For large space buildings, the biggest difference from ordinary buildings in winter heating is that the temperature stratification is particularly obvious. Considering the frequency of the function use of the tall space building in the social life, this topic chooses the industrial building and the public building as the research object of the tall space building; Because of the different energy saving requirements of the building envelope structure in the cold area and the cold area, this subject chooses Harbin city in the cold area and Beijing and Zhengzhou city in the cold area as the typical local cities; According to the heating methods commonly used in the market at present, three kinds of end heating methods are selected: radiator heating, low temperature floor radiation heating and gas infrared radiation heating. In order to study the heat consumption of tall space buildings with different heating end ways, the heat consumption of different types of large space buildings in different regions is calculated by the traditional heat consumption calculation method. By means of CFD numerical simulation, 18 working conditions are simulated and calculated. The difference of heat consumption between heating simulation and theoretical calculation is compared, and the uneven degree of temperature field is evaluated. The results show that the existing heat consumption calculation method is not suitable for the heat consumption calculation of large space buildings. In this paper, it is found that the heating heat consumption of tall space buildings is related to its heating terminal mode, and the choice of high additional heat consumption plays an important role in the heating design of tall space buildings. In addition, in the same area, the large space buildings of different building types have great influence on the calculation of heat consumption of different heating end ways. The same type of buildings and large space buildings with different climatic zones also have an important influence on the calculation of heat consumption in different heating terminal modes.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU832

【参考文献】