Method for measuring whole and local clothing ventilation

A device to measure local clothing ventilation was developed based on analyzing previous clothing ventilation measurements at home and abroad. This method chose N2as the tracer gas and used the so called ' steady state method' based on the mass conservation law. This measuring system can measure the clothing local ventilation values at the chest,back,right arm and left arm at the same time.The clothing whole ventilation value can also be computed according to the measured data. The forced ventilation method was used to verify the system and the method was proved to be feasible. Local ventilation of several upper body garments( hunter jacket,firefighter uniform or vest de chasse) was measured using this system. The results demonstrated that the method has wide application ranges.