Introduction of a new test method for measuring heat and moisture transmission through clothing materials and its application on winter work wear: Dissertation

Harriet Meinander

Research output: ThesisDissertation

2 Citations (Scopus)

Abstract

The conventional methods of estimating the thermal comfort properties of clothing materials (thermal resistance and water vapour permeability) are not suitable for cold weather clothing materials, where a substantial condensation of water vapour takes place in the textiles.A new apparatus, the sweating cylinder, was constructed, which measures simultaneously the heat and moisture transfer in textile systems.A test series was performed, in which 24 material combinations for winter work wear were tested in 3 environment temperatures (0, -20, and -40 °C) and at 2 sweating levels (72 and 145 ml/m²h).The thermal resistance and moisture evaporation values were determined and compared with values from standard measurements.The results show that the thermal resistance of the clothing decreases with an increasing sweating level.The water vapour is only partly transmitted through the textile layers and partly condensates within them.Particularly at -40 °C most of the water remains in the textiles.The correlation of the results from the sweating cylinder with standard thermal resistance measurements is fair at low but poor at high sweating levels.The correlation between standard water vapour transmission tests and evaporation on the cylinder is poor.The test series proved that the sweating cylinder is a valuable instrument for measuring the heat and moisture transmission through textile materials in different environments.After some technical refinements it will be introduced as a standard test method to other research laboratories.
Original languageEnglish
QualificationDoctor Degree
Awarding Institution
  • Tampere University of Technology (TUT)
Award date7 Oct 1985
Place of PublicationEspoo
Publisher
Print ISBNs951-38-2393-8
Publication statusPublished - 1985
MoE publication typeG4 Doctoral dissertation (monograph)

Fingerprint

Textiles
Moisture
Heat resistance
Water vapor
Wear of materials
Evaporation
Thermal comfort
Research laboratories
Condensation
Hot Temperature
Water
Temperature

Keywords

  • clothing
  • physiology
  • heat transmissions
  • moisture
  • tests

Cite this

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title = "Introduction of a new test method for measuring heat and moisture transmission through clothing materials and its application on winter work wear: Dissertation",
abstract = "The conventional methods of estimating the thermal comfort properties of clothing materials (thermal resistance and water vapour permeability) are not suitable for cold weather clothing materials, where a substantial condensation of water vapour takes place in the textiles.A new apparatus, the sweating cylinder, was constructed, which measures simultaneously the heat and moisture transfer in textile systems.A test series was performed, in which 24 material combinations for winter work wear were tested in 3 environment temperatures (0, -20, and -40 °C) and at 2 sweating levels (72 and 145 ml/m²h).The thermal resistance and moisture evaporation values were determined and compared with values from standard measurements.The results show that the thermal resistance of the clothing decreases with an increasing sweating level.The water vapour is only partly transmitted through the textile layers and partly condensates within them.Particularly at -40 °C most of the water remains in the textiles.The correlation of the results from the sweating cylinder with standard thermal resistance measurements is fair at low but poor at high sweating levels.The correlation between standard water vapour transmission tests and evaporation on the cylinder is poor.The test series proved that the sweating cylinder is a valuable instrument for measuring the heat and moisture transmission through textile materials in different environments.After some technical refinements it will be introduced as a standard test method to other research laboratories.",
keywords = "clothing, physiology, heat transmissions, moisture, tests",
author = "Harriet Meinander",
year = "1985",
language = "English",
isbn = "951-38-2393-8",
series = "Technical Research Centre of Finland. Publications",
publisher = "VTT Technical Research Centre of Finland",
number = "24",
address = "Finland",
school = "Tampere University of Technology (TUT)",

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Introduction of a new test method for measuring heat and moisture transmission through clothing materials and its application on winter work wear : Dissertation. / Meinander, Harriet.

Espoo : VTT Technical Research Centre of Finland, 1985. 67 p.

Research output: ThesisDissertation

TY - THES

T1 - Introduction of a new test method for measuring heat and moisture transmission through clothing materials and its application on winter work wear

T2 - Dissertation

AU - Meinander, Harriet

PY - 1985

Y1 - 1985

N2 - The conventional methods of estimating the thermal comfort properties of clothing materials (thermal resistance and water vapour permeability) are not suitable for cold weather clothing materials, where a substantial condensation of water vapour takes place in the textiles.A new apparatus, the sweating cylinder, was constructed, which measures simultaneously the heat and moisture transfer in textile systems.A test series was performed, in which 24 material combinations for winter work wear were tested in 3 environment temperatures (0, -20, and -40 °C) and at 2 sweating levels (72 and 145 ml/m²h).The thermal resistance and moisture evaporation values were determined and compared with values from standard measurements.The results show that the thermal resistance of the clothing decreases with an increasing sweating level.The water vapour is only partly transmitted through the textile layers and partly condensates within them.Particularly at -40 °C most of the water remains in the textiles.The correlation of the results from the sweating cylinder with standard thermal resistance measurements is fair at low but poor at high sweating levels.The correlation between standard water vapour transmission tests and evaporation on the cylinder is poor.The test series proved that the sweating cylinder is a valuable instrument for measuring the heat and moisture transmission through textile materials in different environments.After some technical refinements it will be introduced as a standard test method to other research laboratories.

AB - The conventional methods of estimating the thermal comfort properties of clothing materials (thermal resistance and water vapour permeability) are not suitable for cold weather clothing materials, where a substantial condensation of water vapour takes place in the textiles.A new apparatus, the sweating cylinder, was constructed, which measures simultaneously the heat and moisture transfer in textile systems.A test series was performed, in which 24 material combinations for winter work wear were tested in 3 environment temperatures (0, -20, and -40 °C) and at 2 sweating levels (72 and 145 ml/m²h).The thermal resistance and moisture evaporation values were determined and compared with values from standard measurements.The results show that the thermal resistance of the clothing decreases with an increasing sweating level.The water vapour is only partly transmitted through the textile layers and partly condensates within them.Particularly at -40 °C most of the water remains in the textiles.The correlation of the results from the sweating cylinder with standard thermal resistance measurements is fair at low but poor at high sweating levels.The correlation between standard water vapour transmission tests and evaporation on the cylinder is poor.The test series proved that the sweating cylinder is a valuable instrument for measuring the heat and moisture transmission through textile materials in different environments.After some technical refinements it will be introduced as a standard test method to other research laboratories.

KW - clothing

KW - physiology

KW - heat transmissions

KW - moisture

KW - tests

M3 - Dissertation

SN - 951-38-2393-8

T3 - Technical Research Centre of Finland. Publications

PB - VTT Technical Research Centre of Finland

CY - Espoo

ER -