Initial, transient and steady state evaporative resistance of impermeable protective clothing

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceeding


The measured water vapour resistances of clothing ensembles differ among laboratories particularly for impermeable clothing. Due to the moisture transfer in the clothing ensemble, evaporative heat losses in initial, transient and steady state phases are different. The purpose of this study was to investigate moisture absorption inside underwear and outer layer as a function of time, to quantify the difference of water vapour resistance of protective clothing (impermeable outer layer and cotton underwear) in initial, transient and steady state. Manikin Tore was used by wearing wet ‘skin’ to simulate sweating. The evaporative resistance is found to be more than two times higher in the initial phase than that in the saturation phase. The moisture content is gained exponentially in the clothing ensemble. On the contrary, mass loss directly from the wet skin decreases exponentially. These may partly explain the poor reproducibility while measuring the evaporative resistance of impermeable clothing for a short period.


Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Production Engineering, Human Work Science and Ergonomics


  • water vapour resistances, Manikin Tore, Clothing ensemble, climatic chamber, sweating test
Original languageEnglish
Title of host publication[Host publication title missing]
EditorsJintu Fan
PublisherThe Hong Kong Polytechnic University
Number of pages9
ISBN (Print)962-367-534-8
Publication statusPublished - 2006
Publication categoryResearch
EventThe 6th International Thermal Manikin and Modeling Meeting (6I3M) - The Hong Kong Polytechnic University, Hong Kong SAR
Duration: 2006 Oct 162006 Oct 18


ConferenceThe 6th International Thermal Manikin and Modeling Meeting (6I3M)