摘要
为提高装配式辐射顶板的供冷性能,本文建立了一种采用特殊气体层进行热量交换的新型直接蒸发式防凝露辐射供冷顶板的传热模型,利用CFD数值模拟的研究方法,分析了不同管间距,气体层厚度,管径大小,制冷剂流速及蒸发温度对辐射顶板供冷性能的影响。研究表明:随着管间距,气体层厚度的增大及管径的减小,辐射板供冷能力呈下降趋势。当结构参数一定时,辐射板供冷能力与与流速呈正相关,而与蒸发温度呈负相关,并且不同参数对辐射板性能的影响程度与其它参数有一定关系。
To improve the prefabricated radiation cooling performance of the roof,this paper established a special gas layer is adopted to improve the heat exchange of a new type of direct evaporative condensation heat transfer model of radiant cooling ceiling,using CFD numerical simulation methods,analyzes the different spacing,thickness of gas layer,pipe diameter size,refrigerant flow rate and evaporating temperature effect on the properties of radiation cooling roof.Research shows that:with the increase of tube spacing,thickness of gas layer and the decrease of the pipe diameter,radiant panel cooling ability is on the decline,when the structure parameters of a certain radiant panel cooling capacity and velocity were positively related,and negative correlation with the evaporation temperature,and the influence of different parameters on the performance of radiant panel has relationship with other parameters.
作者
蔡攸婵
王汉青
CAI You-chan;WANG Han-qing(College of Civil Engineering University of South China,Hengyang Hunan;Central South University of Forestry and Technology;Engineering Lab of Hunan for Building Environment Control)
出处
《建筑热能通风空调》
2021年第5期24-28,23,共6页
Building Energy & Environment
基金
国家自然科学基金(No.51876087)
湖南省科技厅重点研发计划(No.2017SK2394)
“建筑节能与环境控制技术”南华大学双一流学科重点建设项目。
关键词
辐射顶板
数值模拟
结构参数
供冷能力
radiant ceiling
numerical simulation
structural parameters
cooling capacity
