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

doi:10.1252/kakoronbunshu.44.355

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

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

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 language	English
Pages (from-to)	355-362
Number of pages	8
Journal	Kagaku Kogaku Ronbunshu
Volume	44
Issue number	6
DOIs	https://doi.org/10.1252/kakoronbunshu.44.355
Publication status	Published - 2018 Jan 1

Keywords

Artificial nos
Breathing control
Heating and humidifying
Phase change

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)

Access to Document

10.1252/kakoronbunshu.44.355

Cite this

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title = "Fundamental characteristics of the transient response of a heat and moisture exchanger with a CaCl2 component",

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.",

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AU - Okinaga, Yoshihito

AU - Hachisuka, Katsumasa

AU - Murata, Makoto

AU - Hagiwara, Ryo

AU - Yamaguchi, Masaki

AU - Eguchi, Kunihisa

AU - Ueda, Toshihisa

PY - 2018/1/1

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N2 - 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.

AB - 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.

KW - Artificial nos

KW - Breathing control

KW - Heating and humidifying

KW - Phase change

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