A Modified Budaiwi Model and Its Experimental Evaluation

GUO Xingguo; CHEN Youming; DENG Yongqiang; ZHANF Le

doi:10.11835/j.issn.1674-4764.2010.02.018

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A Modified Budaiwi Model and Its Experimental Evaluation

更新时间：2023-11-28

- A Modified Budaiwi Model and Its Experimental Evaluation
- Journal of Civil and Environmental Engineering Vol. 32, Issue 2, Pages: 91-95(2010)
- 作者机构：
  
  1. 湖南大学土木工程学院
  2. 教育部建筑安全与节能重点实验室,长沙,410082
- 作者简介：
- 基金信息：
- DOI：10.11835/j.issn.1674-4764.2010.02.018
  CLC：
- Published：2010
- 稿件说明：
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GUO Xingguo, CHEN Youming, DENG Yongqiang, et al. A Modified Budaiwi Model and Its Experimental Evaluation[J]. Journal of Civil and Environmental Engineering, 2010, 32(2): 91-95.
DOI：

GUO Xingguo, CHEN Youming, DENG Yongqiang, et al. A Modified Budaiwi Model and Its Experimental Evaluation[J]. Journal of Civil and Environmental Engineering, 2010, 32(2): 91-95. DOI： 10.11835/j.issn.1674-4764.2010.02.018.

摘要

在Fourier定律和Fick定律的基础上，考虑墙体内部相变及太阳辐射的影响，以墙体中的空气含湿率和温度为驱动势对Budaiwi模型进行了修正

弥补了质传递方程中的遗漏之处。为了验证模型的正确性，建立了一个实验装置测试实际气候条件下墙体内的温度和相对湿度，并将实验结果跟模型预测结果进行了对比，模型预测结果跟试验测试结果吻合良好。室外侧分界面处的空气相对湿度平均误差为4.44%，平均温度偏差为1.31 K，室内侧分界面处的空气相对湿度平均偏差为6.3%，平均温度偏差为1.26 K。该改进模型能较精确的预测墙体内的热湿耦合迁移情况。

Abstract

Based on Fourier and Fick law

a modified Budaiwi model considering phase change within wall and the effect of solar radiation was established by using air humidity ratio in wall and temperature as the driving potentials.The term omitted in the mass transfer equation of the original model was added in the modified model.To evaluate the accuracy of the model

a test system was set up to measure relative humidity and temperature within a porous wall under actual weather conditions and compared with the prediction of the model.It was found that the predictions were in good agreement with the experimental results.At the interface close to outdoor

the average deviation of the relative humidity was 4.44% and average temperature deviation was 1.31K.At the interface close to indoor

the average deviation of the relative humidity was 6.3% and average temperature deviation was 1.26K.

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