Moisture transfer effects on thermo-hydro properties of multilayer wall in cold area

doi:10.11949/j.issn.0438-1157.20170558

CIESC Journal ›› 2017, Vol. 68 ›› Issue (S1): 162-168.DOI: 10.11949/j.issn.0438-1157.20170558

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Moisture transfer effects on thermo-hydro properties of multilayer wall in cold area

LI Wei¹, LIU Fang^1,2,3, CHEN Baoming^1,2,3, WEI Maofeng¹, GAO Kaikai¹, GENG Wenguang⁴

1. School of Thermal Energy Engineering, Shandong Jianzhu University, Jinan 250101, Shandong, China;
2. Key Laboratory of Renewable Energy Utilization Technologies in Building, Ministry of Education, Shandong Jianzhu University, Jinan 250101, Shandong, China;
3. Shandong Key Laboratory of Renewable Energy Application Technology, Shandong Jianzhu University, Jinan 250101, Shandong, China;
4. Energy Research Institute of Shandong Academy Science, Jinan 250101, Shandong, China

Received:2017-05-04 Revised:2017-05-10 Online:2017-08-31 Published:2017-08-31
Supported by:
supported by the National Natural Science Foundation of China (51406105) and the National Key R&D Plan(2016YFB0601302).

寒冷地区湿传递对多层墙体热湿性能的影响

李玮¹, 刘芳^1,2,3, 陈宝明^1,2,3, 魏茂丰¹, 郜凯凯¹, 耿文广⁴

1. 山东建筑大学热能工程学院, 山东济南 250101;
2. 可再生能源建筑利用技术省部共建教育部重点实验室, 山东济南 250101;
3. 山东省可再生能源建筑应用技术重点实验室, 山东济南 250101;
4. 山东省科学院能源研究所, 山东济南 250101

通讯作者: 刘芳,fliu@sdjzu.edu.cn
基金资助:
国家自然科学基金项目（51406105）；国家重点研发计划项目（2016YFB0601302）。

Abstract

Abstract:

The heat and moisture transfer through wall has an important impact on the hygrothermal performance of building envelope,energy consumption and indoor environment. One-dimensional unsteady heat,wet and air coupled transfer (HAM) model of the multilayer wall is founded,with relative humidity and temperature being the driving force in this paper. And the finite element method is used to solve the numerical model. The numerical results show that considering the moisture transfer,the humidity gradient and the rate of mass change due to phase change is high near the internal and exterior surface; moisture would be accumulated in wall,which shorten the service life of the wall; the range of temperature rise is large and the rise rate is high,moisture transfer have great effect on the average Nu of the wall; the heat storage is 1.6 times as much as that of ignoring moisture transfer,and it is not conducive to the building energy efficiency of air conditioning buildings when the calculation is ignoring moisture transfer.

Key words: porous media, two-phase flow, transport processes, cold area, multilayer wall, heat air and moisture model, thermo-hydro properties, finite element method

摘要：

墙体的传热传湿对建筑围护结构的热工性能、建筑能耗和室内环境有十分重要的影响。以相对湿度和温度为驱动势建立多层墙体一维非稳态热、湿和空气耦合传递模型（HAM模型），并利用有限元法进行数值求解，重点关注湿传递对传热的影响机理。结果表明：考虑传湿时墙体交界面处湿度梯度大，相变速率大；墙体内部会产生湿积累，缩短墙体的使用年限；墙体内部温度上升幅度和上升速率大，墙体交界面处局部Nusselt数变化受湿传递的影响大；相变潜热量占总传热量的26.1%，计算空调负荷时不可忽略。

关键词: 多孔介质, 两相流, 传递过程, 寒冷地区, 多层墙体, HAM模型, 热湿性能, 有限元法

CLC Number:

TK121

LI Wei, LIU Fang, CHEN Baoming, WEI Maofeng, GAO Kaikai, GENG Wenguang. Moisture transfer effects on thermo-hydro properties of multilayer wall in cold area[J]. CIESC Journal, 2017, 68(S1): 162-168.

李玮, 刘芳, 陈宝明, 魏茂丰, 郜凯凯, 耿文广. 寒冷地区湿传递对多层墙体热湿性能的影响[J]. 化工学报, 2017, 68(S1): 162-168.

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Moisture transfer effects on thermo-hydro properties of multilayer wall in cold area

寒冷地区湿传递对多层墙体热湿性能的影响

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