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

LI Wei; LIU Fang; CHEN Baoming; WEI Maofeng; GAO Kaikai; GENG Wenguang

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

更新时间：2025-12-10

- Moisture transfer effects on thermo-hydro properties of multilayer wall in cold area
- CIESC Journal Issue S1, Pages: 162-168(2017)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20170558
  CLC： K121
- Online First：31 August 2017，
  
  Published：31 August 2017
- 稿件说明：
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LI Wei, LIU Fang, CHEN Baoming, et al. Moisture transfer effects on thermo-hydro properties of multilayer wall in cold area[J]. CIESC Journal, 2017, (S1): 162-168.
DOI：

LI Wei, LIU Fang, CHEN Baoming, et al. Moisture transfer effects on thermo-hydro properties of multilayer wall in cold area[J]. CIESC Journal, 2017, (S1): 162-168. DOI： 10.11949/j.issn.0438-1157.20170558.

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。

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.

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