Warmtetransport in Kleding bij Aanstraling met Warmte (Heat Transport in Clothing during Irradiation with Heat).

摘要

A model is suggested to calculate temperatures and heatflows in clothing with one-sided heat radiation. Two clothing layers are taken into account in the model. The model is verified experimentally. In these experiments only the dry heatflow is measured by wrapping the subjects in plastic foil. In the first experiment the influence of radiation (550 Wsq.m) wind (1 m/s) and movement (standing or walking 4 km/h) were studied. Wind and movement decrease clothing temperature and insulation. The insulation of the air is mainly influenced by wind whereas the clothing isolation is mainly influenced by movement. The mean difference between the measured and calculated temperatures is 0.4 C (SD = 1.9) and between heatflow O W (SD = 13). In a second experiment the influence of the radiation properties of clothing was determined. The subjects wore absorbing, reflecting, and transmitting garments while walking at a speed of 4 km/h in radiation of 800 W/sqm. In the reflecting garment, the mean skin temperature was 5 C lower than in the absorbing or transmitting garment. The mean difference between measured temperatures and calculated temperatures is 1.2 C (SD = 1.4), and between the heatflows 2.2 W (SD = 8.6). Keywords: Protective clothing, Mathematical models, Thermal properties, Netherlands, Dutch language. (jhd)