基于REV的保温多孔材料传热“三箱”分析模型  

“Three-box”Model of Heat Transfer for Porous Thermal Insulation Materials Based on REV

作　　者：王志国[1] 赵子琦 郑刚[2,5] 晏耿成[2,5] 朱云鹏[1] 杨文哲 宋永臣 WANG Zhi-Guo;ZHAO Zi-Qi;ZHENG Gang;YAN Geng-Cheng;ZHU Yun-Peng;YANG Wen-Zhe;SONG Yong-Chen(School of Civil Engineering,Northeast Petroleum University,Daqing 163318,China;Oil&Gas Technology Research Institute,Changqing Oilfield Company,Xi’an 710021,China;School of Mechanical Engineering,Tianjin University of Commerce,Tianjin 300134,China;School of Energy and Power,Dalian University of Technology,Dalian 116024,China;National Engineering Laboratory for Exploration and Development of Low Permeability Oil and Gas Field,Xi’an 710021,China)

机构地区：[1]东北石油大学土木建筑工程学院,大庆163318 [2]长庆油田分公司油气工艺研究院,西安710021 [3]天津商业大学机械工程学院,天津300134 [4]大连理工大学能源与动力学院,大连116024 [5]低渗透油气田勘探开发国家工程实验室,西安710021

出　　处：《工程热物理学报》2021年第8期1950-1957,共8页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目(No.51706154);黑龙江省科学基金项目(No.E2018011);天津市自然科学基金项目(18JCQNJC77-300);中国石油科技创新基金资助项目(No.2018D-5007-0211)。

摘　　要：保温材料广泛应用于建筑中的制冷与空调等领域,保温多孔介质材料的内部结构复杂无规律且孔隙分布具有不确定性,热质传递作用机理复杂多变,目前的分析方法和研究模型普适性差,对一些微观热质传递机理问题尚未提出解决方法。本文基于表征体元REV,建立了保温多孔介质材料传热计算"三箱"分析模型。利用"三箱"模型对保温多孔介质材料传热过程进行分析,并给出各模型下多孔介质导热系数计算公式。基于保温多孔介质材料传热计算"三箱"分析模型,对不同孔隙率、孔隙通道分布系数和迂曲度的硅酸钙材料进行了计算和模拟并研究了其对保温多孔介质材料导热系数的影响,总结出其变化规律。本文所做工作,不仅为保温多孔介质材料传热分析研究提供了新模型与新方法,在其他类型多孔材料研究中也有借鉴意义。Thermal insulation materials are widely used in the fields of refrigeration and air conditioning in buildings.The internal structures of the porous insulation materialsare irregular,whose pore distributionsare uncertain,and whose heat and mass transfer mechanismsare complex and changeable.The current heat and mass transfer analysis methods and models are poor in adaptability.And no solution has been proposedfor the problems of microscopic heat and mass transfer mechanisms.Based on the representative elementary volume(REV)method,this paper establishes a“three-box”model of heat transfer forporous thermal insulation materials.The“three-box”model is used to analyze the heat transfer process of the porous thermal insulationmaterials,and the calculation formula of the thermal conductivity of porous media in each model is given.Based on the“three-box”model of heat transfer forporous thermalinsulation materials,the calculation and simulation of calcium silicate materials withdifferent porosity,pore distribution coefficients and tortuosity are carried out.And their influences on the thermal conductivity of porous thermal insulation materialsare studied.Thenthe changing law of thermal conductivity is summarized.By using a new method in this paper,we propose a new model of heat transfer for porous thermal insulation materials.And this proposed modelalso can be used for other typesof porousmaterials.

关 键 词：“三箱”模型 多孔介质 导热系数 表征体元 建筑多孔材料 

分 类 号：TU551.1[建筑科学—建筑技术科学]