ISO 18640-1:2018 消防士用防護服—生理学的影響—パート1：発汗胴体との熱と水分の結合伝達の測定 | ページ 6

3.1

cooling delay

CD

time delay until the effect of evaporation cooling will be detected in an experimental phase with simulated activity and sweating

Note 1 to entry: The cooling delay is given in minutes.

3.2

evaporated sweat water

fraction of supplied sweat water which is evaporated in active phase with sweating

3.3

experimental phase

part of an experiment with a defined sweat rate and surface temperature or heating power; an experiment can consist of multiple phases

Note 1 to entry: Each phase simulates a specific situation with defined temperature or heating power and sweat rate settings. A standard experiment consists of three phases.

3.4

initial cooling

IC

rate at which temperature changes after cooling delay CD in an experimental phase simulating activity with sweating

Note 1 to entry: The initial cooling is given in degrees (°C) per hour.

3.5

moisture uptake

amount of moisture stored in clothing system determined by torso weight

Note 1 to entry: The moisture uptake is given in grams.

3.6

post cooling

PC

end of cooling period in an experimental phase without sweating and heating power corresponding to a human being at rest following a simulated activity

Note 1 to entry: The evaporation of stored moisture will extract energy from the sweating torso which can be detected in a decrease of the surface temperature.

Note 2 to entry: The post cooling is given in minutes.

3.7

phase profile

series of experimental phases which define the experiment

3.8

sustained cooling

sc

rate at which temperature changes towards the end of an experimental phase simulating activity with sweating (steady state of cooling)

Note 1 to entry: The sustained cooling is given in degrees (°C) per hour.

3.9

spacer

air layer

frame or setup to add a defined air layer between torso surface and protective garment to be tested

Note 1 to entry: Simulation of air layers which are typically observed in real use. An air layer influences overall thermal resistance and moisture transport. A spacer may be used to simulate a defined air layer.

3.10

sweat water

supply of water used to simulate sweating

3.10.1

gravimetric system to deliver sweat water

control of sweat water delivery using a tank on a balance with a defined height difference to the sweat nozzles to deliver the set amount of water by opening and closing valves in a calibrated interval

Note 1 to entry: Other ways of sweat water deliver may be used as long as the requirements of this document are fulfilled.

3.11

thermal resistance

R_{ct (torso)}

calculated at steady state from the difference between torso surface temperature and ambient temperature, the surface area of the device and the heating power needed to maintain the temperature difference

Note 1 to entry: The thermal insulation is given in m²∙K/W.

3.11.1

correction value for R_{ct (torso)}

R_{ct0 (torso)}

thermal resistance measurement without a sample on the sweating torso to determine a system specific correction value for the thermal resistance R_{ct (torso)}

Note 1 to entry: Thermal resistance as defined above depends on the geometry of the apparatus, convective conditions (wind or still air) and ambient conditions. R_{ct0 (torso)} is a cumulative measure of this and might differ slightly from device to device and installation to installation. By taking it into account differences in results from different installations can be reduced.

3.12

torso balance

device used to measure torso weight

3.13

torso surface temperature

average temperature on the surface of the measurement area of the torso

3.14

torso weight

overall weight of the sweating torso and test object during a test

3.15

total sweat water

amount of water supplied to torso surface during an active phase with sweating

3.16

wicking layer

thin hydrophilic textile layer with defined moisture transport and thermal properties used for homogeneous sweat water distribution

3.17

wind speed

ambient velocity of air flow around the torso during an experiment

Note 1 to entry: To avoid undefined boundary air layers due to random air exchange in the chamber and the temperature difference between torso surface and climatic chamber a fan system is used. The fan system consists of ventilators to achieve a set homogeneous wind speed at the torso surface of 1 m/s (turbulence level of up to 25 % measured with a hot-wire anemometer).