北方地区供暖情况下室内热环境数值分析  

Numerical analysis of the indoor thermal environment under the condition of heating in northern China

作　　者：王烨[1,2] 王靖文[1] 王良璧[2] 张文霞[1] 

机构地区：[1]兰州交通大学环境与市政工程学院,甘肃兰州730070 [2]兰州交通大学铁道车辆热工教育部重点实验室,甘肃兰州730070

出　　处：《哈尔滨工程大学学报》2014年第11期1441-1445,共5页Journal of Harbin Engineering University

基　　金：国家自然科学基金资助项目(51266004;51476073);甘肃省自然科学基金资助项目(1308RJZA151)

摘　　要：为研究建筑围护结构热工性能与供暖季室内散热器传热特性的关联性,采用一种修正的湍流k-ε模型对兰州地区某民用住宅室内热环境进行了数值分析,获得了该住宅在4种外墙类型情况下的散热器传热特性和室内流场、温度场分布。结果表明:在满足室内供暖温度要求条件下(室内平均温度达到18°C),散热器表面对流换热能力随外墙导热系数的增大而增大;室内形成了明显的温度分层现象,外墙导热系数越大,接近地板的温度越低,形成的"冷气湖"厚度自东墙朝西墙方向逐渐变薄;选择不同的外墙类型,室内速度场的变化很微弱。In this paper, the relevance between the thermal performance of building envelope and the heat transfer characteristics of the indoor radiators in a heating season was studied. A revised κ-ε model was used to numerically analyze the indoor thermal environment of a residential house in Lanzhou, China. The objective was to obtain the velocity field, temperature field and heat transfer characteristics of the radiator under four types of external walls of the house. The results indicate that the Nusselt numbers on the radiator surface are increasing with the increasing outerwall thermal conductivity when the indoor average temperature is up to 18℃. The temperature stratification in the room is very obvious. The temperature close to the floor is decreasing with the increasing outerwall thermal conductivity, the so-called ＂cold air lake＂ thickness becomes thinner and thinner from the east wall to the west wall. The difference of indoor flow field structure is very small for the given four types of outerwall.

关 键 词：建筑围护结构 自然对流 供暖 数值模拟 热环境 散热器 温度 室内 

分 类 号：TU832[建筑科学—供热、供燃气、通风及空调工程]