Fundamental characteristics of the transient response of a heat and moisture exchanger with a CaCl2 component

Yoshihito Okinaga, Katsumasa Hachisuka, Makoto Murata, Ryo Hagiwara, Masaki Yamaguchi, Kunihisa Eguchi, Toshihisa Ueda

Research output: Contribution to journalArticle

Abstract

The fundamental characteristics of a medical heat and moisture exchanger with filter (HMEF), the artificial nose, were investigated experimentally and numerically. Transient changes in the temperature and humidity in HMEF were measured. Saturated air at 37°C simulating exhalation by a patient was fed into the HMEF for 180 s, then dry air at 26°C simulating inhalation was fed in the opposite direction. CaCl2 installed in the HMEF intensified the condensation of water and retained water in the HMEF. The water vaporized in the returning dry air, allowing and a patient to inhale air with some humidity. The results also revealed that the condensed water can not be completely returned to the inhalation supply. The numerical results showed the difference in the process of condensation and vaporization.

Original languageEnglish
Pages (from-to)355-362
Number of pages8
JournalKagaku Kogaku Ronbunshu
Volume44
Issue number6
DOIs
Publication statusPublished - 2018 Jan 1

Keywords

  • Artificial nos
  • Breathing control
  • Heating and humidifying
  • Phase change

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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    Okinaga, Y., Hachisuka, K., Murata, M., Hagiwara, R., Yamaguchi, M., Eguchi, K., & Ueda, T. (2018). Fundamental characteristics of the transient response of a heat and moisture exchanger with a CaCl2 component. Kagaku Kogaku Ronbunshu, 44(6), 355-362. https://doi.org/10.1252/kakoronbunshu.44.355