Development and experimental validation of a one-dimensional dynamic hygrothermal modeling based on air humidity ratio |
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Authors: | Xing-guo Guo You-ming Chen and Yong-qiang Deng |
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Affiliation: | [1]School of Civil Engineering and Architecture, Nanchang University, Nanchang 330031, China [2]College of Civil Engineering, Hunan University, Changsha 410082, China |
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Abstract: | A modified one-dimensional transient hygrothermal model for multilayer wall was proposed using air humidity ratio and temperature
as the driving potentials. The solution for the governing equations was obtained numerically by implementing the finite-difference
scheme. To evaluate the accuracy of the model, a test system was built up to measure relative humidity and temperature within
a porous wall and compare with the prediction of the model. The prediction results have good agreement with the experimental
results. For the interface close to indoor side, the maximum deviation of temperature between calculated and test data is
1.87 K, and the average deviation is 0.95 K; the maximum deviation of relative humidity is 11.4%, and the average deviation
is 5.7%. For the interface close to outdoor side, the maximum deviation of temperature between prediction and measurement
is 1.78 K, and the average deviation is 1.1 K; the maximum deviation of relative humidity is 9.9%, and the average deviation
is 4.2%. |
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Keywords: | transient hygrothermal modeling air humidity ratio modified modeling experimental test multilayer wall |
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