Moisture Buffer Effect and its Impact on Indoor Environment

Mingjie Zhang, Menghao Qin*, Zhi Chen

*Corresponding author for this work

Research output: Contribution to journalConference articleResearchpeer-review

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The moisture buffer effect of building materials may have great influence on indoor hygrothermal environment. In order to characterize the moisture buffering ability of materials, the basic concept of moisture buffer value (MBV) is adopted. Firstly, a theoretical correction factor is introduced in this paper. The moisture uptake/release by hygroscopic materials can be calculated with the factor and the basic MBV. Furthermore, the validation of the correction factor is carried out. The impact of moisture buffering on indoor environment is assessed by using numerical simulations. The results show that the application of hygroscopic materials with large MBV values could reduce the fluctuation of indoor relative humidity, thus decreasing the energy demand for dehumification. The potential energy saving rate of the test building in temperate climates and semi-arid climates could be up to 25-30%. Finally, the relationship between MBV and potential energy saving rate is discussed.
Original languageEnglish
JournalProcedia Engineering
Pages (from-to)1123-1129
Publication statusPublished - 2017
Event10th International Symposium on Heating, Ventilation and Air Conditioning - Jinan, China
Duration: 19 Oct 201722 Oct 2017
Conference number: 10


Conference10th International Symposium on Heating, Ventilation and Air Conditioning


  • Building energy conservation
  • Hygroscopic material
  • Indoor humidity condition
  • Moisture Buffer Effect
  • Test method

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