Solid sub-23nm particle number emission measurement inter-laboratory comparison exercise
An interlaboratory comparison exercise of solid, sub-23nm particle number emission (PN) measurements was conducted in 10 emission laboratories. The exercise was divided in two parts: European part (EU) consisting of seven different laboratories and Asian part comprising three different laboratories. In the exercise a light-duty gasoline direct injection vehicles and two reference solid particle number measurement systems and additional particle number counter for >10 nm particle counting were circulated in the laboratories. Solid particle number concentrations were measured from the full dilution tunnel in parallel with reference systems including both >23 nm and >10 nm particle number counters (PN23, PN10) and the laboratory solid particle number measurement system (PMP) also including both >23 nm and >10 nm particle number counters. The reference systems were equipped with catalytic evaporation tubes while the laboratory systems had evaporation tubes.
The determined average PN10 and PN23 emissions were the same for all the instruments within the inter-laboratory coefficient of variance (s_L), separately for different test cycles in the first exercise parts (EU). In the second part, the low number of laboratories affected the results, yet, the PN10 and PN23 results for different instruments were within 20%. In general, reproducibility coefficient of variance (S_R) were at the same level for PN10 and PN23, thus suggesting that PN10 measurement is feasible with the reference methods.
LAHDE Tero;
GIECHASKIEL Barouch;
MARTINI Giorgio;
WOODBURN Joseph;
BIELACZYC Piotr;
SCHREIBER Daniel;
HUBER M.;
FITTAVOLINI C;
PELLEGRINI Leonardo;
KIRCHNER Ulf;
SCHUSTER Norbert;
MOMIQUE Jean Claude;
MONIER Richard;
SHENG Su;
YITU Lai;
WANYOU L;
MURTONEN Timo;
VANHANEN Joonas;
DARDIOTIS Christos;
MAMAKOS Athanasios;
KREUTZIGER Philipp;
SPIELVOGEL J.;
2023-10-03
Publications Office of the European Union
JRC126191
978-92-76-40950-2 (online),
1831-9424 (online),
EUR 30798 EN,
OP KJ-NA-30798-EN-N (online),
https://publications.jrc.ec.europa.eu/repository/handle/JRC126191,
10.2760/618474 (online),
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