| Document ID (ISN) | 66427 |
| CIS number |
96-987 |
| ISSN - Serial title |
0014-0139 - Ergonomics |
| Year |
1995 |
| Convention or series no. |
|
| Author(s) |
Lotens W.A., Van de Linde F.J.G., Havenith G. |
| Title |
Effects of condensation in clothing on heat transfer |
| Bibliographic information |
June 1995, Vol.38, No.6, p.1114-1131. Illus. 18 ref. |
| Abstract |
The condensation theory presented here enables calculation of the rate of vapour transfer with its associated effects on temperature and total heat transfer inside a clothing ensemble consisting of underclothing, enclosed air, and outer garment. The model was tested in three experiments: (1) impermeable garments worn by subjects with and without plastic wrap around the skin, blocking sweat evaporation underneath the clothing; (2) comparison of heat loss in impermeable and semi-permeable garments and the associated discomfort and strain; (3) subjects working in impermeable garments in cool and warm environments at two work rates, until the limit of tolerance was reached. The measured heat exchange and temperatures are predicted with satisfying accuracy by the model. Numerical analysis shows that the major determinants of heat loss are vapour permeability of the outer garment, skin vapour concentration and air temperature. In the cold, the condensation mechanism may completely compensate for the lack of permeability of the clothing as far as heat dissipation is concerned, but in the heat, impermeable clothing is more stressful. |
| Descriptors (primary) |
thermal balance; heat transfer; mathematical models; clothing |
| Descriptors (secondary) |
heat load; human experiments; thermal comfort |
| Document type |
D - Periodical articles |
| Country / State or Province | Netherlands |
| Subject(s) |
Heating, ventilation and climate
|
| Broad subject area(s) |
Physical hazards
|
| Browse category(ies) |
Heat and cold
|
