Deliverables Pilot studies of CEN protocols for evaluating the emission of airborne hazardous substances from machines In this large two-part project, we have investigated and developed a number of methods for measuring the emission rates of pollutants from machines covering particulate and gaseous pollutants, a wide range of machines, in both test houses and the real workplace. We have achieved the following main objectives: 1.An assessment of the performance of the methodology for the current test bench standard EN 1093-3 has been carried out. It was found that the resultant emission rate measurements depending upon; the size distribution of the emitted dust, the transport velocity and transport distance in the test cabin, the degree of mixing in the test bench funnel and sampling duct. 2.A revised protocol for EN 1093-3 has been proposed. This incorporates the suggested changes made in light of the assessment carried out, and includes a number of possible options. If particle deposits on the test bench floor are included, then the biases in the measured emission rate measurements were limited to about 10 %. Intra and inter-laboratory variables were on average less than about 10 and 15 % respectively. 3.A draft protocol for EN 1093-2 for measuring the emission rates of gaseous pollutants from machines using tracer gas techniques, has been produced. It incorporates in the methodology, many of the important requirements that the laboratory tests had shown were essential for accurate results. The results from two laboratories had shown that the overall variability in the results was ± 11 %, with the mean bias in the range -10 to + 5%. Searching for OpenAIRE data... There was an error trying to search data from OpenAIRE No results available
