Application of hygroscopic material to moderate indoor humidity environment

H. B. Zhang, Hiroshi Yoshino, K. Hasegawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Keeping indoor humidity environment steady with the correct level is very important for ensuring the sustainable and healthy building. Hygroscopic material, which has ability of adsorbing and desorbing moisture from the adjacent air naturally, can be applied to moderate indoor humidity variations without adding energy cost. So far, there are many kinds of hygroscopic materials with good moisture buffering effect, have been applied to building envelope. However, these methods used only an element sample material in a small climatic oven without ventilation, and the ambience air is assumed well-mixed. These evaluation methods are limited to evaluate material self-properties, and they are inadequate to reveal the material's moisture buffering performance in a real room space. In this research, a series of experiments were carried out in climate controlled test chamber with different loading ratio (loading ratio: the ratio of material's furnishing area to room volume) of hygroscopic material, different air change rate and different moisture production rate. The purpose of this paper is to understand humidity variations by furnishing hygroscopic material, as well as to evaluate the moisture buffering effect of building envelope when hygroscopic material is applied in a room scale. Experimental results indicated that the application of hygroscopic material was an efficient way to reduce the amplitude of daily moisture variation. Furthermore, the moisture adsorption / desorption effects decreased exponentially when the ambient air change rate per unit area of hygroscopic material increased. These experimental and analysis results are very useful for the application of hygroscopic material, as well as for the realization of comfortable and healthy indoor humidity environment from design stage.

Original languageEnglish
Title of host publication7th International Symposium on Heating, Ventilating and Air Conditioning - Proceedings of ISHVAC 2011
Pages126-132
Number of pages7
Publication statusPublished - 2011 Dec 1
Event7th International Symposium on Heating, Ventilating and Air Conditioning, ISHVAC 2011 - Shanghai, China
Duration: 2011 Nov 62011 Nov 9

Publication series

Name7th International Symposium on Heating, Ventilating and Air Conditioning - Proceedings of ISHVAC 2011
Volume1

Other

Other7th International Symposium on Heating, Ventilating and Air Conditioning, ISHVAC 2011
CountryChina
CityShanghai
Period11/11/611/11/9

Keywords

  • Humidity
  • Hygroscopic material
  • Moisture buffering effect
  • Moisture distribution

ASJC Scopus subject areas

  • Environmental Science (miscellaneous)

Fingerprint Dive into the research topics of 'Application of hygroscopic material to moderate indoor humidity environment'. Together they form a unique fingerprint.

Cite this