R 134a losses from car air-conditioning systems

摘要

The specific approach of this German EPA explanatory study recently carried out is the ex post evaluating data records of refrigerant losses of vehicles actually driven on roads. Overall R 134a emissions are broken down into three types: Normal (bit by bit release through sealings), Irregular (abruptly, in case of accidents, stone hits etc.), Disposal emissions (ELV sucking off not occurring). Based on 1000 A/C units opened and recorded by 9 garages in 2000, the rate of normal loss is assessed at 6.3%/yr (25% tolerance band) during the first seven years of ex work A/C systems' use phase. Irregular losses amount to almost 2%/yr. Future disposal emissions are estimated at 2% on an one-year-base. Thus, the overall emissions range around 10%/yr.