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

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

VTT Technical Research Centre of Finland

Research output: Thesis › Dissertation › Monograph

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 language	English
Qualification	Doctor Degree
Awarding Institution	Tampere University of Technology (TUT)
Award date	7 Oct 1985
Place of Publication	Espoo
Publisher	VTT Technical Research Centre of Finland
Print ISBNs	951-38-2393-8
Publication status	Published - 1985
MoE publication type	G4 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

Meinander, H. (1985). Introduction of a new test method for measuring heat and moisture transmission through clothing materials and its application on winter work wear: Dissertation. Espoo: VTT Technical Research Centre of Finland.

Meinander, Harriet. / Introduction of a new test method for measuring heat and moisture transmission through clothing materials and its application on winter work wear : Dissertation. Espoo : VTT Technical Research Centre of Finland, 1985. 67 p.

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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 = "Publications / Technical Research Centre of Finland",

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Meinander, H 1985, 'Introduction of a new test method for measuring heat and moisture transmission through clothing materials and its application on winter work wear: Dissertation', Doctor Degree, Tampere University of Technology (TUT), Espoo.

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: Thesis › Dissertation › Monograph

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 - Publications / Technical Research Centre of Finland

PB - VTT Technical Research Centre of Finland

CY - Espoo

ER -

Meinander H. Introduction of a new test method for measuring heat and moisture transmission through clothing materials and its application on winter work wear: Dissertation. Espoo: VTT Technical Research Centre of Finland, 1985. 67 p.