Application of the Moisture Potential Theory in Assessing the Heat and Moisture Regime of Building Envelopes
- Authors: Zubarev K.P.1,2,3
-
Affiliations:
- National Research Moscow State University of Civil Engineering
- Scientific-Research Institute of Building Physics of RAACS
- RUDN University
- Issue: No 6 (2024)
- Pages: 46-51
- Section: International Scientific Conference – XV Academic readings dedicated to the memory of Academician of RAACS Osipov G.L., "Actual problems of building physics. Energy saving. Reliability of building structures and environmental safety. Artificial Intelligence"
- URL: https://gynecology.orscience.ru/0585-430X/article/view/635095
- DOI: https://doi.org/10.31659/0585-430X-2024-825-6-46-51
- ID: 635095
Cite item
Abstract
The review of existing mathematical models for humidity conditions was carried out. Methods giving an opportunity to calculate moisture transfer in the sorption zone of humidification and in the supersorption zone are described. The features of calculating moisture distribution using the theory of moisture potential are shown. The new discrete-continuous method for calculating the moisture state of a fence is proposed, which makes it possible to determine the unsteady-state moisture regime using an analytical expression without using various numerical methods. Two formulas for a single-layer and a multi-layer building envelope are derived. The formula allows us to determine the distribution of moisture potential in various sections of building envelopes. The effectiveness of the method is proven by comparing the results obtained with calculations using non-stationary and engineering quasi-stationary calculation methods. The humidity regime of a single-layer enclosing structure in the city of Moscow made of aerated concrete blocks, as well as a two-layer enclosing structure with a clay brick base and silicate brick cladding was calculated. It is shown that the calculation results using the proposed method are both quantitatively and qualitatively close to the distribution obtained using the non-stationary calculation method for both single-layer and multi-layer enclosing structures. The method is recommended for use in engineering work, because it gives a possibility to take into account the inertia of moisture in the building envelope.
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About the authors
K. P. Zubarev
National Research Moscow State University of Civil Engineering; Scientific-Research Institute of Building Physics of RAACS; RUDN University
Author for correspondence.
Email: zubarevkirill93@mail.ru
Candidate of Sciences (Engineering)
Russian Federation, Moscow; Moscow; MoscowReferences
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